U.S. patent application number 15/949161 was filed with the patent office on 2018-08-09 for method for winding a stator for use in a dual-phased motor.
The applicant listed for this patent is Sunonwealth Electric Machine Industry Co., Ltd.. Invention is credited to Chung-Ken Cheng, I-Fen Hsieh, Sing-Ying Lee, Shit-Chin Wu.
Application Number | 20180226854 15/949161 |
Document ID | / |
Family ID | 55526664 |
Filed Date | 2018-08-09 |
United States Patent
Application |
20180226854 |
Kind Code |
A1 |
Cheng; Chung-Ken ; et
al. |
August 9, 2018 |
Method for Winding a Stator for use in a Dual-Phased Motor
Abstract
A method for winding a stator for use in a dual-phased motor is
disclosed. The stator includes a magnetic yoke portion and first,
second, third and fourth magnetic poles that are circumferentially
arranged around and coupled with the magnetic yoke portion. The
method includes winding a first wire around the first and third
magnetic poles to form first coil layers, winding a second wire
around the first magnetic pole to form a second coil layer, around
the second magnetic pole to form a first coil layer, around the
third magnetic pole to form a second coil layer, and around the
fourth magnetic pole to form a first coil layer, and winding a
third wire around the second and fourth magnetic poles to form
second coil layers.
Inventors: |
Cheng; Chung-Ken; (Kaohsiung
City, TW) ; Hsieh; I-Fen; (Kaohsiung City, TW)
; Wu; Shit-Chin; (Kaohsiung City, TW) ; Lee;
Sing-Ying; (Kaohsiung City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Sunonwealth Electric Machine Industry Co., Ltd. |
Kaohsiung City |
|
TW |
|
|
Family ID: |
55526664 |
Appl. No.: |
15/949161 |
Filed: |
April 10, 2018 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
14814545 |
Jul 31, 2015 |
|
|
|
15949161 |
|
|
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02K 15/095 20130101;
H02K 3/28 20130101 |
International
Class: |
H02K 3/28 20060101
H02K003/28; H02K 15/095 20060101 H02K015/095 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 24, 2014 |
TW |
103133060 |
Claims
1. A method for winding a stator for use in a dual-phased motor,
wherein the stator comprises a magnetic yoke portion and first,
second, third and fourth magnetic poles that are circumferentially
arranged around and coupled with the magnetic yoke portion, wherein
the method comprises: winding a first wire around the first and
third magnetic poles to form first coil layers; winding a second
wire around the first magnetic pole to form a second coil layer,
around the second magnetic pole to form a first coil layer, around
the third magnetic pole to form a second coil layer, and around the
fourth magnetic pole to form a first coil layer; and winding a
third wire around the second and fourth magnetic poles to form
second coil layers.
2. The method for winding the stator for use in the dual-phased
motor as claimed in claim 1, wherein the first coil layer of each
of the first, second, third and fourth magnetic poles is an inner
layer of the coil, and wherein the second coil layer of each of the
first, second, third and fourth magnetic poles is an outer layer of
the coil.
3. The method for winding the stator for use in the dual-phased
motor as claimed in claim 1, further comprising: dividing each of
the first, second, third and fourth magnetic poles into two winding
areas radially spaced from each other; and winding the first coil
layer and the second coil layer in the two winding areas,
respectively.
4. The method for winding the stator for use in the dual-phased
motor as claimed in claim 1, wherein the first and second coil
layers of the first and third magnetic poles are wound in a
direction, and wherein the first and second coil layers of the
second and fourth magnetic poles are wound in another direction
opposite to the direction.
5. The method for winding the stator for use in the dual-phased
motor as claimed in claim 1, further comprising: connecting two
ends of the first wire to a common pin and a connection pin,
respectively; connecting two ends of the second wire to a second
power pin and the common pin, respectively; and connecting two ends
of the third wire to the connection pin and a first power pin.
6. A method for winding a stator for use in a dual-phased motor,
wherein the stator comprises a magnetic yoke portion and first,
second, third and fourth magnetic poles that are circumferentially
arranged around and coupled with the magnetic yoke portion, wherein
the method comprises: winding a first wire around the first and
second magnetic poles to form first coil layers; winding a second
wire around the first magnetic pole to form a second coil layer,
around the second magnetic pole to form a second coil layer, around
the third magnetic pole to form a first coil layer, and around the
fourth magnetic pole to form a first coil layer; and winding a
third wire around the third and fourth magnetic poles to form
second coil layers.
7. The method for winding the stator for use in the dual-phased
motor as claimed in claim 6, wherein the first and second coil
layers of the first and third magnetic poles are wound in a
direction, and wherein the first and second coil layers of the
second and fourth magnetic poles are wound in another direction
opposite to the direction.
8. A method for winding a stator for use in a dual-phased motor,
wherein the stator comprises a magnetic yoke portion and first,
second, third and fourth magnetic poles that are circumferentially
arranged around and coupled with the magnetic yoke portion, wherein
the method comprises: winding a first wire around the first,
second, third and fourth magnetic poles to form first coil layers;
connecting two ends of the first wire to a common pin and a first
power pin, respectively; winding a second wire around the first,
second, third and fourth magnetic poles to form second coil layers;
and connecting two ends of the second wire to a second power pin
and the common pin, respectively.
9. The method for winding the stator for use in the dual-phased
motor as claimed in claim 8, wherein the first and second coil
layers of the first and third magnetic poles are wound in a
direction, and wherein the first and second coil layers of the
second and fourth magnetic poles are wound in another direction
opposite to the direction.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The application claims the benefit of Taiwan application
serial No. 103133060, filed Sept. 24, 2014, the subject matter of
which is incorporated herein by reference.
[0002] This is a divisional application of U.S. patent application
Ser. No. 14/814,545 filed on Jul. 31, 2015.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0003] The present invention generally relates to a stator for use
in a dual-phased motor and, more particularly, to a stator for use
in a dual-phased motor in which the stator includes a plurality of
magnetic poles each being wound with first and second coil
layers.
2. Description of the Related Art
[0004] FIG. 1 shows a conventional stator 9 for use in a
dual-phased motor. The stator 9 includes a first magnetic pole 91,
a second magnetic pole 92, a third magnetic pole 93 and a fourth
magnetic pole 94 that are circumferentially arranged around and
coupled with a magnetic yoke portion 95. The winding of the stator
9 is formed by center tapping. The magnetic poles 91, 92, 93, 94
can be wound with a wire to form a coil 96 on each of the magnetic
poles 91, 92, 93, 94. The wire includes two ends connected to a
first power pin "O" and a second power pin "I", respectively. The
wire also forms a common pin "V" at a center thereof by center
tapping. In the arrangement, each coil 96 of the first and third
magnetic poles 91, 93 is in a first phase, and each coil 96 of the
second and fourth magnetic poles 92, 94 is in a second phase.
Accordingly, the stator 9 can be used in a brushless direct current
motor in order to drive the rotor of the motor to rotate.
[0005] In this structure, the stator 9 can be activated by
dual-phased power which includes first-phased power and
second-phased power. The first-phased power can be received via the
first power pin "O", and the second-phased power can be received
via the second power pin "I." The common pin "V" can be connected
to ground or can have a reference voltage.
[0006] However, the stator 9 still has some disadvantages. For
example, surge is easily induced on the coils 96 when the voltage
polarities of the first-phased power and the second-phased power
change (phase commutation), leading to generation of noise or
vibration of the dual-phased motor.
[0007] In light of this, it is necessary to provide a novel stator
for use in a dual-phased motor and a method for winding the stator.
The stator is able to reduce the surge of individual coils when the
voltage polarities of the first-phased power and the second-phased
power change, thereby advantageously reducing the noise and
vibration generated during the operation of the motor and improving
its operational stability.
SUMMARY OF THE INVENTION
[0008] It is therefore the objective of this disclosure to provide
a stator for use in a dual-phased motor in which the stator
includes a plurality of magnetic poles each being wound with a
first coil layer and a second coil layer. The first and second coil
layers on each magnetic pole are designed to have different phases
in order to form a first-phased coil and a second-phased coil on
the magnetic pole, thereby reducing the surge that is generated on
the first and second coil layers during the phase commutation of
first-phased power and second-phased power.
[0009] It is another objective of this disclosure to provide a
method for winding a stator of a dual-phased motor. In the method,
a first wire is wound around two of four magnetic poles of the
stator to form first coil layers, a second wire is wound around the
two magnetic poles of the stator to form second coil layers and
wound around another two of four magnetic poles to form first coil
layers, and a third wire is wound around the other two magnetic
poles to form second coil layers. In this arrangement, the first
and second coil layers of each magnetic pole are able to have
different phases.
[0010] In an embodiment, a stator for use in a dual-phased motor
comprises a magnetic yoke portion, a first magnetic pole, a second
magnetic pole, a third magnetic pole and a fourth magnetic pole.
The first, second, third and fourth magnetic poles are
circumferentially arranged around and coupled with the magnetic
yoke portion. Each of the first, second, third and fourth magnetic
poles is wound with a coil having a first coil layer and a second
coil layer. The first coil layer and the second coil layer of each
of the first, second, third and fourth magnetic poles are in
different phases.
[0011] In a form shown, the first coil layers of the first, second,
third and fourth magnetic poles comprise at least one first-phased
coil and at least one second-phased coil, and the second coil
layers of the first, second, third and fourth magnetic poles also
comprise at least one first-phased coil and at least one
second-phased coil.
[0012] In the form shown, the first coil layers of the first and
third magnetic poles are first-phased coils, the second coil layers
of the second and fourth magnetic poles are first-phased coils, the
second coil layers of the first and third magnetic poles are
second-phased coils, and the first coil layers of the second and
fourth magnetic poles are second-phased coils.
[0013] In the form shown, the first coil layers of the first and
third magnetic poles are formed by a first wire, the second coil
layers of the first and third magnetic poles and the first coil
layers of the second and fourth magnetic poles are formed by a
second wire, and the second coil layers of the second and fourth
magnetic poles are formed by a third wire.
[0014] In the form shown, the first coil layers of the first and
second magnetic poles are first-phased coils, the second coil
layers of the third and fourth magnetic poles are first-phased
coils, the second coil layers of the first and second magnetic
poles are second-phased coils, and the first coil layers of the
third and fourth magnetic poles are second-phased coils.
[0015] In the form shown, the first coil layers of the first and
second magnetic poles are formed by a first wire, the second coil
layers of the first and second magnetic poles and the first coil
layers of the third and fourth magnetic poles are formed by a
second wire, and the second coil layers of the third and fourth
magnetic poles are formed by a third wire.
[0016] In the form shown, the stator further comprises a common
pin, a connection pin, a first power pin and a second power pin.
The first wire has two ends respectively connected to the common
pin and the connection pin, the second wire has two ends
respectively connected to the second power pin and the common pin,
and the third wire has two ends respectively connected to the
connection pin and the first power pin.
[0017] In the form shown, the first coil layers of the first,
second, third and fourth magnetic poles are first-phased coils, and
the second coil layers of the first, second, third and fourth
magnetic poles are second-phased coils.
[0018] In the form shown, the stator further comprises a common
pin, a first power pin and a second power pin. The first coil
layers of the first, second, third and fourth magnetic poles are
formed by a first wire, and the second coil layers of the first,
second, third and fourth magnetic poles are formed by a second
wire. The first wire has two ends respectively connected to the
common pin and the first power pin, and the second wire has two
ends respectively connected to the second power pin and the common
pin.
[0019] In the form shown, the first coil layer of each of the
first, second, third and fourth magnetic poles is an inner layer of
the coil, and the second coil layer of each of the first, second,
third and fourth magnetic poles is an outer layer of the coil that
is axially wound around the first coil layer.
[0020] In the form shown, each of the first, second, third and
fourth magnetic poles is divided into two winding areas radially
spaced from each other for the winding purposes of the first coil
layer and the second coil layer.
[0021] In the form shown, each of the first, second, third and
fourth magnetic poles comprises a partition that divides the
magnetic pole into the two winding areas.
[0022] In the form shown, the stator further comprises a plurality
of magnetic poles in addition to the first, second, third and
fourth magnetic poles, and a total number of the plurality of
magnetic poles and the first, second, third and fourth magnetic
poles is even
[0023] In the form shown, the coils of the first and third magnetic
poles are wound in a first direction, and the coils of the second
and fourth magnetic poles are wound in a second direction opposite
to the first direction.
[0024] In the form shown, the windings of the first and second coil
layers have a same number of turns.
[0025] In the form shown, a number of the first, second, third and
fourth magnetic poles having the first coil layer being the
first-phased coil is the same as a number of the first, second,
third and fourth magnetic poles having the first coil layer being
the second-phased coil, and a number of the first, second, third
and fourth magnetic poled having the second coil layer being the
first-phased coil is the same as a number of the first, second,
third and fourth magnetic poles having the second coil layer being
the second-phased coil.
[0026] In another embodiment, a method for winding a stator for use
in a dual-phased motor is disclosed. The stator comprises first,
second, third and fourth magnetic poles that are circumferentially
arranged around and coupled with a magnetic yoke portion. The
method comprises winding a first wire around the first and third
magnetic poles to form first coil layers; winding a second wire
around the first magnetic pole to form a second coil layer, around
the second magnetic pole to form a first coil layer, around the
third magnetic pole to form a second coil layer, and around the
fourth magnetic pole to form a first coil layer; and winding a
third wire around the second and fourth magnetic poles to form
second coil layers.
[0027] In still another embodiment, a method for winding a stator
for use in a dual-phased motor is disclosed. The stator comprises
first, second, third and fourth magnetic poles that are
circumferentially arranged around and coupled with a magnetic yoke
portion. The method comprises winding a first wire around the first
and second magnetic poles to form first coil layers; winding a
second wire around the first magnetic pole to form a second coil
layer, around the second magnetic pole to form a second coil layer,
around the third magnetic pole to form a first coil layer, and
around the fourth magnetic pole to form a first coil layer; and
winding a third wire around the third and fourth magnetic poles to
form second coil layers.
[0028] In a form shown, the method further comprises connecting two
ends of the first wire to a common pin and a connection pin,
respectively; connecting two ends of the second wire to a second
power pin and the common pin, respectively; and connecting two ends
of the third wire to the connection pin and a first power pin.
[0029] In a further embodiment, a method for winding a stator for
use in a dual-phased motor is disclosed. The stator comprises
first, second, third and fourth magnetic poles that are
circumferentially arranged around and coupled with a magnetic yoke
portion. The method comprises winding a first wire around the
first, second, third and fourth magnetic poles to form first coil
layers; connecting two ends of the first wire to a common pin and a
first power pin respectively; winding a second wire around the
first, second, third and fourth magnetic poles to form second coil
layers; and connecting two ends of the second wire to a second
power pin and the common pin, respectively.
[0030] In the form shown, the method further comprises dividing
each of the first, second, third and fourth magnetic poles into two
winding areas radially spaced from each other, and winding the
first coil layer and the second coil layer in the two winding
areas, respectively.
[0031] In the form shown, the first and second coil layers of the
first and third magnetic poles are wound in a direction, and the
first and second coil layers of the second and fourth magnetic
poles are wound in another direction opposite to the direction.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The present invention will become more fully understood from
the detailed description given hereinafter and the accompanying
drawings which are given by way of illustration only, and thus are
not limitative of the present invention, and wherein:
[0033] FIG. 1 is a top view of a conventional stator for use in a
dual-phased motor.
[0034] FIG. 2 is a top view of a stator for use in a dual-phased
motor according to a first embodiment of the invention.
[0035] FIG. 3 shows the winding mechanisms of the stator of the
first embodiment of the invention.
[0036] FIG. 4 is a top view of the stator of the first embodiment
where the winding process starts with a first wire.
[0037] FIG. 5 is the top view of the stator of the first embodiment
where the first wire is being wound around a first magnetic pole of
the stator to form a first coil layer.
[0038] FIG. 6 is the top view of the stator of the first embodiment
where the first wire is being wound around a third magnetic pole of
the stator to form another first coil layer.
[0039] FIG. 7 is the top view of the stator of the first embodiment
where the winding operation of the first wire is completed.
[0040] FIG. 8 is the top view of the stator of the first embodiment
where the first magnetic pole of the stator is wound with a second
coil layer.
[0041] FIG. 9 is the top view of the stator of the first embodiment
where a second magnetic pole of the stator is wound with a first
coil layer.
[0042] FIG. 10 is the top view of the stator of the first
embodiment where a third magnetic pole of the stator is wound with
a second coil layer.
[0043] FIG. 11 is the top view of the stator of the first
embodiment where a fourth magnetic pole of the stator is wound with
a first coil layer.
[0044] FIG. 12 is the top view of the stator of the first
embodiment where the second magnetic pole of the stator is wound
with a second coil layer.
[0045] FIG. 13 is the top view of the stator of the first
embodiment where a fourth magnetic pole of the stator is wound with
a second coil layer.
[0046] FIG. 14 is the top view of the stator of the first
embodiment where the winding operations of all of the wires are
completed.
[0047] FIG. 15a shows a voltage diagram measured from the coils of
the conventional stator of FIG. 1.
[0048] FIG. 15b shows a voltage diagram measured from the first and
second coil layers of the stator of the first embodiment of the
invention.
[0049] FIG. 16 is a top view of a stator for use in a dual-phased
motor according to a second embodiment of the invention.
[0050] FIG. 17 shows the winding mechanisms of the stator of the
second embodiment of the invention.
[0051] FIG. 18 is a top view of a stator for use in a dual-phased
motor according to a third embodiment of the invention.
[0052] FIG. 19 is a partially-enlarged, cross sectional view of the
stator of the third embodiment of the invention.
[0053] FIG. 20 shows the winding mechanisms of the stator of the
third embodiment of the invention.
[0054] In the various figures of the drawings, the same numerals
designate the same or similar parts. Furthermore, when the terms
"first", "second", "third", "fourth", "inner", "outer", "top",
"bottom", "front", "rear" and similar terms are used hereinafter,
it should be understood that these terms have reference only to the
structure shown in the drawings as it would appear to a person
viewing the drawings, and are utilized only to facilitate
describing the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0055] FIG. 2 shows a stator for use in a dual-phased motor
according to a first embodiment of the disclosure. The stator of
the first embodiment can be used to form a brushless direct current
motor and includes a plurality of magnetic poles and a magnetic
yoke portion 15. The magnetic yoke portion 15 is coupled with at
least four magnetic poles. The at least four magnetic poles include
a first magnetic pole 11, a second magnetic pole 12, a third
magnetic pole 13 and a fourth magnetic pole 14. The magnetic poles
11, 12, 13, 14 are coupled with and circumferentially arranged
around the magnetic yoke portion 15. However, the magnetic yoke
portion 15 can be coupled with a plurality of magnetic poles having
a quantity being a multiple of 2. Namely, the stator for use in a
dual-phased motor can have 4, 6, 8, 10 or 12 poles. The stator for
use in a dual-phased motor in the first embodiment can be used in
an inner-rotor-type motor or an outer-rotor-type motor. In this
embodiment, the stator is used in an outer-rotor-type motor in
which the magnetic poles 11, 12, 13, 14 are circumferentially
arranged around and coupled with an outer periphery of the magnetic
yoke portion 15. In another case where the stator is used in an
inner-rotor-type motor, the magnetic poles 11, 12, 13, 14 would be
coupled with an inner periphery of the magnetic yoke portion 15, as
it can be readily appreciated by one skilled in the art.
[0056] Each of the magnetic poles 11, 12, 13, 14 is wound with a
coil 2 having a first coil layer 21 and a second coil layer 22. The
windings of first and second coil layers 21, 22 can have the same
number of turns. Specifically, the first coil layer 21 is wound
around an outer periphery of first magnetic pole 11, and the second
coil layer 22 is then wound on the first coil layer 21. As such,
the first coil layer 21 is an inner layer of the coil 2 and the
second coil layer 22 is an outer coil layer of the coil 2. Similar
to the first magnetic pole 11, each of the second, third and fourth
magnetic poles 12, 13, 14 is wound with first and second coil
layers 21, 22. The first coil layer 21 on each magnetic pole is
always an inner layer of the coil 2 and the second coil layer 22 on
each magnetic pole is always an outer layer of the coil 2.
Furthermore, as stated above, the second coil layer 22 is wound
around first coil layer 21. Therefore, the first and second coil
layers 21, 22 form a double-layered coil structure. However, the
first and second coil layers 21, 22 have different phases.
[0057] Among the first coil layers 21 of the magnetic poles 11, 12,
13, 14, said first coil layers 21 include at least one first-phased
coil 2a and at least one second-phased coil 2b. Similarly, among
the second coil layers 22 of the magnetic poles 11, 12, 13, 14,
said second coil layers 22 also include at least one first-phased
coil 2a and at least one second-phased coil 2b. In other words,
there is at least one first-phased coil 2a and at least one
second-phased coil 2b out of the first coil layers 21, and there is
also at least one first-phased coil 2a and at least one
second-phased coil 2b out of the second coil layers 22.
[0058] Among the first, second, third and fourth magnetic poles 11,
12, 13, 14, the number of the magnetic pole(s) having the first
coil layer 21 being the first-phased coil 2a may be the same as the
number of the magnetic pole(s) having the first coil layer 21 being
the second-phased coil 2b, and the number of the magnetic pole(s)
having the second coil layer 22 being the first-phased coil 2a may
be the same as the number of the magnetic pole(s) having the second
coil layer 22 being the second-phased coil 2b. In other words, the
first coil layers 21 of the magnetic poles 11, 12, 13, 14 may
include the same number of first-phased coils 2a and second-phased
coils 2b, and the second coil layers 22 of the magnetic poles 11,
12, 13, 14 may also include the same number of first-phased coils
2a and second-phased coils 2b.
[0059] For example, the first coil layers 21 of first and third
magnetic poles 11, 13 in the embodiment are first-phased coils 2a,
and the second coil layers 22 of second and fourth magnetic poles
12, 14 are first-phased coils 2a. As such, the second coil layers
22 of first and third magnetic poles 11, 13 are second-phased coils
2b, and the first coil layers 21 of second and fourth magnetic
poles 12, 14 are second-phased coils 2b. In this manner, the first
and second coil layers 21, 22 on each magnetic pole are in
different phases. Thus, each of the magnetic poles 11, 12, 13, 14
includes the first-phased coils 2a and the second-phased coils 2b.
In this regard, the first coil layers 21 of all of the magnetic
poles 11, 12, 13, 14 include two first-phased coils 2a and two
second-phased coils 2b, and the second coil layers 22 of all of the
magnetic poles 11, 12, 13, 14 also include two first-phased coils
2a and two second-phased coils 2b.
[0060] Specifically, FIG. 3 shows a winding mechanism of the stator
for use in a dual-phased motor in the first embodiment of the
invention. The first coil layers 21 of first and third magnetic
poles 11, 13 are formed by winding a first wire 31 around said
magnetic poles 11, 13. The second coil layers 22 of first and third
magnetic poles 11, 13 and the first coil layers 21 of second and
fourth magnetic poles 12, 14 are formed by winding a second wire 32
around said magnetic poles 11, 12, 13, 14. In addition, the second
coil layers 22 of second and fourth magnetic poles 12, 14 are
formed by winding a third wire 33 around said magnetic poles 12,
14. In this regard, please also refer to FIG. 2, the stator for use
in a dual-phased motor may include a common pin "V", a connection
pin "C", a first power pin "O" and a second power pin "I." Two ends
of first wire 31 are connected to the common pin "V" and the
connection pin "C", respectively. Two ends of second wire 32 are
connected to the second power pin "I" and the common pin "V",
respectively. In addition, two ends of third wire 33 are connected
to the connection pin "C" and the first power pin "O",
respectively.
[0061] The stator for use in a dual-phased motor may receive
dual-phased power which includes first-phased power and
second-phased power. Since the first-phased power may be received
between the first power pin "O" and the common pin "V", the
first-phased power is able to generate an electric current between
the first power pin "O" and the common pin "V." The electric
current flows on the third wire 33 and flows through the second
coil layers 22 of second and fourth magnetic poles 12, 14. The
electric current can be guided to the first wire 31 via the
connection pin "C", so that the electric current is able to flow
through the first coil layers 21 of first and third magnetic poles
11, 13. Thus, the first coil layers 21 of first and third magnetic
poles 11, 13 and the second coil layers 22 of second and fourth
magnetic poles 12, 14 are first-phased coils 2a.
[0062] Similarly, since the second-phased power may be received
between the second power pin "I" and the common pin "V", the
second-phased power is able to generate an electric current between
the second power pin "I" and the common pin "V." The electric
current flows on the second wire 32 and flows through the second
coil layer 22 of first magnetic pole 11, the first coil layer 21 of
second magnetic pole 12, the second coil layer 22 of third magnetic
pole 13 and the first coil layer 21 of fourth magnetic pole 14.
Thus, the second coil layer 22 of first magnetic pole 11, the first
coil layer 21 of second magnetic pole 12, the second coil layer 22
of third magnetic pole 13 and the first coil layer 21 of fourth
magnetic pole 14 are second-phased coils 2b.
[0063] Generally, a bobbin may be coupled with and fitted around an
outer periphery of magnetic yoke portion 15. In this regard, the
common pin "V", the connection pin "C", the second power pin "I"
and the first power pin "O" can be arranged on the bobbin. The
structure and arrangement of the bobbin is not described herein as
it can be readily appreciated by one having ordinary skill in the
art.
[0064] The method for winding the stator for use in a dual-phased
motor in the first embodiment of the disclosure is elaborated as
follows.
[0065] Referring to FIG. 4, the winding operation of first wire 31
is performed first. One end of the first wire 31 is connected to a
common pin "V." Referring to FIG. 5, the first wire 31 is wound
around the first magnetic pole 11 to form a first coil layer 21.
Referring to FIG. 6, the first wire 31 is also wound around the
third magnetic pole 13 to form a first coil layer 21. Referring to
FIG. 7, another end of the first wire 31 is connected to a
connection pin "C" as a final step of the winding operation of
first wire 31. In other words, two ends of the first wire 31 may be
connected to the common pin "V" and the connection pin "C",
respectively. In one aspect, the two ends of the first wire 31 may
also be respectively soldered to the common pin "V" and the
connection pin "C" to electrically connect the first wire 31 to the
common pin "V" and the connection pin "C", as it can be readily
appreciated by the skilled person.
[0066] Although the winding operation of first wire 31 starts at
common pin "V" and finishes at connection pin "C" in FIGS. 4-7, the
winding operation of the first wire 31 may also start at connection
pin "C", wound around the third magnetic pole 13 and the first
magnetic pole 11 to form a first coil layer 21 on each of the first
and third magnetic poles 11, 13, and finally connected to the
common pin "V." As such, the winding operation of the first wire 31
is performed by winding the first wire 31 around the first and
third magnetic poles 11, 13 to form a first coil layer 21 on each
of the first and third magnetic poles 11, 13 and connecting two
ends of the first wire 31 to the common pin "V" and the connection
pin "C", respectively.
[0067] Referring to FIG. 8, the winding operation of the second
wire 32 is then performed. One end of the second wire 32 is
connected to a second power pin "I", and the second wire 32 is
wound around the first coil layer 21 of the first magnetic pole 11
to form a second coil layer 22. Referring to FIG. 9, the second
wire 32 is wound around the second magnetic pole 12 to form a first
coil layer 21. Referring to FIG. 10, the second wire 32 is then
wound around the first coil layer 21 of the third magnetic pole 13
to form a second coil layer 22. Referring to FIG. 11, the second
wire 32 is wound around the fourth magnetic pole 14 to form a first
coil layer 21, and another end of the second wire 32 is connected
to the common pin "V." Thus, the two ends of the second wire 32 are
connected to the second power pin "I" and the common pin "V",
respectively. In one aspect, the two ends of the second wire 32 may
also be respectively soldered to the second power pin "I" and the
common pin "V" to electrically connect the second wire 32 to the
second power pin "I" and the common pin "V", as it can be readily
appreciated by the skilled person.
[0068] Similar to the first wire 31, the sequence of the winding
procedures of the second wire 32 is not limited to the above. In
other words, the winding operation of second wire 32 may start at
common pin "V" and finish at second power pin "I." As such, the
winding operation of the second wire 32 is performed by winding the
second wire 32 around the first coil layer 21 of the first magnetic
pole 11 to form a second coil layer 22, winding the second wire 32
around the second magnetic pole 12 to form a first coil layer 21,
winding the second wire 32 around the first coil layer 21 of the
third magnetic pole 13 to form a second coil layer 22, winding the
second wire 32 around the fourth magnetic pole 14 to form a first
coil layer 21, and connecting the second wire 32 to the second
power pin "I" and the common pin "V" respectively.
[0069] Referring to FIG. 12, the winding operation of a third wire
33 is performed last. One end of the third wire 33 is connected to
the connection pin "C", and the third wire 33 is wound around the
first coil layer 21 of the second magnetic pole 12 to form a second
coil layer 22. Referring to FIG. 13, the third wire 33 is then
wound around the first coil layer 21 of the fourth magnetic pole 14
to form a second coil layer 22. Referring to FIG. 14, another end
of the third wire 33 is connected to a first power pin "O" as a
final step of the winding operation of the third wire 33. Thus, the
two ends of the third wire 33 are connected to the connection pin
"C" and the first power pin "O", respectively. In one aspect, the
two ends of the third wire 33 may also be respectively soldered to
the connection pin "C" and the first power pin "O" to electrically
connect the third wire 33 to the connection pin "C" and the first
power pin "O", as it can be readily appreciated by the skilled
person.
[0070] Similar to the first wire 31 and the second wire 32, the
sequence of the winding procedures of the third wire 33 is not
limited to the above. In other words, the winding operation of
third wire 33 may start at first power pin "O" and finish at
connection pin "C." As such, the winding operation of the third
wire 33 is performed by winding the third wire 33 around the first
coil layer 21 of the second magnetic pole 12 to form a second coil
layer 22, winding the third wire 33 around the first coil layer 21
of the fourth magnetic pole 14 to form a second coil layer 22, and
connecting the third wire 33 to the connection pin "C" and the
first power pin "O" respectively.
[0071] Referring to FIGS. 2 and 14 also, after the winding
operations of the first, second and third wires 31, 32 and 33 are
finished, the first coil layers 21 of the first and third magnetic
poles 11 and 13 and the second coil layers 22 of the second and
fourth magnetic poles 12 and 14 may form first-phased coils 2a, and
the second coil layers 22 of the first and third magnetic poles 11
and 13 and the first coil layers 21 of the second and fourth
magnetic poles 12 and 14 may form second-phased coils 2b. Thus, the
winding operations of the stator for use in a dual-phased motor in
the first embodiment are completed.
[0072] As stated above, the dual-phased motor of the first
embodiment may be activated by dual-phased power having
first-phased power and second-phased power. The first-phased power
may be fed between the first power pin "O" and the common pin "V",
and the second-phased power may be fed between the second power pin
"I" and the common pin "V." The first-phased power may generate an
electric current between the first power pin "O" and the common pin
"V" in which the electric current flows through the first-phased
coils 2a formed by the first coil layers 21 of the first and third
magnetic poles 11 and 13 and the second coil layers 22 of the
second and fourth magnetic poles 12 and 14. Similarly, the
second-phased power may generate an electric current between the
second power pin "I" and the common pin "V" in which the electric
current flows through the second-phased coils 2b formed by the
second coil layer 22 of the first magnetic pole 11, the first coil
layer 21 of the second magnetic pole 12, the second coil layer 22
of the third magnetic pole 13 and the first coil layer 21 of the
fourth magnetic pole 14.
[0073] Referring to FIG. 15a which shows a voltage diagram measured
from the coil 96 of the stator 9 when the dual-phased power is fed
into a brushless direct current (BLDC) motor using the conventional
stator 9. In FIG. 15a, the first signal "P1" represents the voltage
diagram of the coil 96 when the first-phased power of the
dual-phased power is fed into the coil 96, and the second signal
"P2" represents the voltage diagram of the coil 96 when the
second-phased power of the dual-phased power is fed into the coil
96. It can be observed from the first signal "P1" and the second
signal "P2" that surge "R" tends to occur on the coil 96 during the
change of the voltage polarity of the first-phased power and the
second-phased power (phase commutation). The magnitude difference
".DELTA.R" between the surge "R" and the first signal "P1" and the
second signal "P2" is approximately 20 volts.
[0074] Referring to FIG. 15b which shows a voltage diagram measured
from the coil 2 when said dual-phased power is fed into a BLDC
motor using the stator of the first embodiment. In FIG. 15b, the
third signal "P3" represents the voltage diagram of the first power
pin "O" when the first-phased power of said dual-phased power is
fed into the first power pin "O", and the fourth signal "P4"
represents the voltage diagram of the second power pin "I" when the
second-phased power of the dual-phased power is fed into the second
power pin "I." The third signal "P3" can be retrieved from each
first-phased coil 2a, and the fourth signal "P4" can be retrieved
from each second-phased coil 2b, as it can be readily appreciated
by the skilled person. It can be observed from the third signal
"P3" and the fourth signal "P4" that surge R' tends to occur on the
coil 2 during the change of the voltage polarity of the
first-phased power and the second-phased power (phase commutation).
The magnitude difference .DELTA.R' between the surge R' and the
third signal "P3" and the fourth signal "P4" is approximately 10
volts. According to the comparison, it is proven that the stator
for use in a dual-phased motor as disclosed by the invention is
able to effectively reduce the surge of the coil 2 generated during
the phase commutation of the first-phased power and the
second-phased power.
[0075] Referring to FIG. 16, a stator for use in a dual-phased
motor is shown according to a second embodiment of the invention.
The stator also comprises a magnetic yoke portion 15 that couples
with a first magnetic pole 11, a second magnetic pole 12, a third
magnetic pole 13 and a fourth magnetic pole 14. The stator in the
second embodiment differs from that in the first embodiment in that
the first coil layers 21 on the first and second magnetic poles 11
and 12 and the second coil layers 22 on the third and fourth
magnetic poles 13 and 14 are first-phased coils 2a. In this regard,
the second coil layers 22 on the first and second magnetic poles 11
and 12 and the first coil layers 21 on the third and fourth
magnetic poles 13 and 14 are second-phased coils 2b. In this
embodiment, the first coil layer 21 on each of the magnetic poles
is an inner layer of the coil 2, and the second coil layer 22 on
each of the magnetic poles is an outer layer of the coil 2. The
second coil layer 22 is wound around the first coil layer 21 along
an axial direction of the magnetic yoke portion 15. In this manner,
the first and second coil layers 21 and 22 are able to form a
double-layered coil structure.
[0076] Specifically, referring to FIG. 17, a winding mechanism of
the stator of the second embodiment of the invention is shown. The
first coil layers 21 on the first and second magnetic poles 11 and
12 may be formed by a first wire 31, the second coil layers 22 on
the first and second magnetic poles 11 and 12 and the first coil
layers 21 on the third and fourth magnetic poles 13 and 14 may be
formed by a second wire 32, and the second coil layers 22 on the
third and fourth magnetic poles 13 and 14 may be formed by a third
wire 33. Also referring to FIG. 16, the stator of the dual-phased
motor may have a common pin "V", a connection pin "C", a first
power pin "O" and a second power pin "I." Two ends of the first
wire 31 are connected to the common pin "V" and the connection pin
"C", respectively. Two ends of the second wire 32 are connected to
the second power pin "I" and the common pin "V", respectively. Two
ends of the third wire 33 are connected to the connection pin "C"
and the first power pin "O", respectively.
[0077] Since first-phased power can be fed between the first power
pin "O" and the common pin "V", the first-phased power is able to
generate an electric current between the first power pin "O" and
the common pin "V." The electric current flows through the second
coil layers 22 of the fourth and third magnetic poles 14 and 13
along the third wire 33. The electric current then flows to the
first wire 31 via the connection pin "C" and flows through the
first coil layers 21 of the second and first magnetic poles 12 and
11. Therefore, the first coil layers 21 of the first and second
magnetic poles 11 and 12 and the second coil layers 22 of the third
and fourth magnetic poles 13 and 14 are first-phased coils 2a.
[0078] Similarly, the second-phased power may be fed into the
second power pin "I" and the common pin "V." Therefore, the
second-phased power may generate an electric current on the second
power pin "I" and the common pin "V." The electric current flows
through the second coil layers 22 of the first and second magnetic
poles 11 and 12 and the first coil layers 21 of the third and
fourth magnetic poles 13 and 14 along the second wire 32.
Therefore, the second coil layers 22 of the first and second
magnetic poles 11 and 12 and the first coil layers 21 of the third
and fourth magnetic poles 13 and 14 are second-phased coils 2b.
[0079] The method for winding the stator of the second embodiment
is similar to the method for winding the stator of the first
embodiment. The method for winding the stator of the second
embodiment also includes the winding operations of the first,
second and third wires 31, 32 and 33. The winding operation of the
first wire 31 is performed by winding the first wire 31 around the
first and second magnetic poles 11 and 12 to form first coil layers
21 and connecting two ends of the first wire 31 to the common pin
"V" and the connection pin "C." The winding operation of the second
wire 32 is performed by winding the second wire 32 around the first
coil layer 21 of the first magnetic pole 11 to form a second coil
layer 22, winding the second wire 32 around the first coil layer 21
of the second magnetic pole 12 to form another second coil layer
22, winding the second wire 32 around the third magnetic pole 13 to
form a first coil layer 21, winding the second wire 32 around the
fourth magnetic pole 14 to form another first coil layer 21, and
connecting two ends of the second wire 32 to the second power pin
"I" and the common pin "V." The winding operation of the third wire
33 is performed by winding the third wire 33 around the first coil
layers 21 of the third and fourth magnetic poles 13, 14 to form
second coil layers 22 and connecting the two ends of the third wire
33 to the connection pin "C" and the first power pin "O."
[0080] It can be known from the above that, in the stator of the
second embodiment, the first coil layer 21 and the second coil
layer 22 on each of the magnetic poles are able to have different
phases by forming the first coil layers 21 of the first and second
magnetic poles 11, 12 and the second coil layers 22 of the third
and fourth magnetic poles 13, 14 as first-phased coils 2a as well
as forming the second coil layers 22 of the first and second
magnetic poles 11, 12 and the first coil layers 21 of the third and
fourth magnetic poles 13, 14 as second-phased coils 2b.
[0081] Referring to FIG. 18, a stator for use in a dual-phased
motor is shown according to a third embodiment of the invention.
Although the second coil layer 22 is wound around the first coil
layer 21 to respectively form the first and second coil layers 21,
22 as an inner layer of the coil 2 and an outer layer of the coil 2
in the first and second embodiments, the first coil layer 21 and
the second coil layer 22 may be separately wound around each of the
first, second, third and fourth magnetic poles 11, 12, 13, 14 in
the third embodiment. Specifically, as an example of the first
magnetic pole 11, the first coil layer 21 and the second coil layer
22 are wound around the first magnetic pole 11 in a manner that the
first coil layer 21 is arranged on the portion of the first
magnetic pole 11 relatively distant to the magnetic yoke portion 15
and the second coil layer 22 is arranged on the portion of the
first magnetic pole 11 relatively adjacent to the magnetic yoke
portion 15. In this arrangement, the first coil layer 21 and the
second coil layer 22 may be separately wound around the first
magnetic pole 11 without forming the double-layered coil structure
in the first and second embodiments. As such, the magnetic pole may
be divided into two winding areas along a radial direction for
winding purposes of the first coil layer 21 and the second coil
layer 22.
[0082] More specifically, each of the first, second, third and
fourth magnetic poles 11, 12, 13, 14 may be provided with a
partition 16. The partition 16 may be coupled to the outer
periphery of the magnetic pole. Alternatively, each of the first,
second, third and fourth magnetic poles 11, 12, 13, 14 may be
provided with a winding bobbin 17 on which the partition 16 is
formed. The partition 16 may be formed on the winding bobbin 17 in
an integral manner or may be an independent component that is
attached to the winding bobbin 17. As an example of second magnetic
pole 12, FIG. 19 shows a partially-enlarged, cross sectional view
of the second magnetic pole 12 wherein the partition 16 is provided
to divide the space of the winding bobbin 17 into two winding areas
for winding the first coil layer 21 and the second coil layer 22,
respectively. Therefore, the partition 16 is able to prevent the
first coil layer 21 and the second coil layer 22 from coming into
contact with each other during the winding operations thereof
Advantageously, the winding operation of the stator of the third
embodiment is convenient. However, the structure and arrangement of
the winding bobbin 17 is not described herein as it can be readily
appreciated by the skilled person.
[0083] Besides, although both the first coil layer 21 and the
second coil layer 22 include at least one first-phased coil 2a and
at least one second-phased coil 2b in the above first and second
embodiments, each of the first coil layer 21 is a first-phased coil
2a and each of the second coil layer 22 is a second-phased coil 2b
in the third embodiment. Accordingly, the stator of the third
embodiment is able to effectively reduce the surge of the coils 2
during the phase commutation of the first-phased power and the
second-phased power.
[0084] More specifically, FIG. 20 shows a winding mechanism of the
stator of the third embodiment of the invention. A first wire 31
may be wound around the first, second, third and fourth magnetic
poles 11, 12, 13, 14 to form four first coil layers 21, and a
second wire 32 may be wound around the first, second, third and
fourth magnetic poles 11, 12, 13, 14 to form four second coil
layers 22. The stator of the third embodiment may include a common
pin "V", a first power pin "O" and a second power pin
[0085] "I." Two ends of the first wire 31 are connected between the
common pin "V" and the first power pin "O", and two ends of the
second wire 32 are connected between the second power pin "I" and
the common pin "V."
[0086] Since first-phased power may be fed between the first power
pin "O" and the common pin "V", the first-phased power is able to
generate an electric current between the first power pin "O" and
the common pin "V." The electric current flows through the first
coil layers 21 of the first, second, third and fourth magnetic
poles 11, 12, 13, 14. Thus, the first coil layers 21 of the first,
second, third and fourth magnetic poles 11, 12, 13, 14 are
first-phased coils 2a.
[0087] Similarly, since second-phased power may be fed between the
second power pin "I" and the common pin "V", the second-phased
power is able to generate an electric current between the second
power pin "I" and the common pin "V." The electric current flows
through the second coil layers 22 of the first, second, third and
fourth magnetic poles 11, 12, 13, 14. Thus, the second coil layers
22 of the first, second, third and fourth magnetic poles 11, 12,
13, 14 are second-phased coils 2b.
[0088] The method for winding the stator of the third embodiment
includes the winding operations of the first wire 31 and the second
wire 32. The winding operation of the first wire 31 is performed by
winding the first wire 31 around the first, second, third and
fourth magnetic poles 11, 12, 13, 14 to form a first coil layer 21
on each of said magnetic poles 11, 12, 13, 14 and connecting the
two ends of the first wire 31 to the common pin "V" and the first
power pin "O", respectively. The winding operation of the second
wire 32 is performed by winding the second wire 32 around the
first, second, third and fourth magnetic poles 11, 12, 13, 14 to
form a second coil layer 22 on each of said magnetic poles 11, 12,
13, 14 and connecting the two ends of the second wire 32 to the
second power pin "I" and the common pin "V", respectively.
[0089] It can be known from the above that, in the stator of the
third embodiment, the first coil layer 21 and the second coil layer
22 on each of the magnetic poles 11, 12, 13, 14 are able to have
different phases by forming the first coil layers 21 of the first,
second, third and fourth magnetic poles 11, 12, 13, 14 as
first-phased coils 2a as well as forming the second coil layers 22
of the first, second, third and fourth magnetic poles 11, 12, 13,
14 as second-phased coils 2b.
[0090] Referring to FIGS. 3, 17 and 20, it may be noted that the
coils 2 are wound around the first and third magnetic poles 11, 13
in a first direction in the methods for winding the stators of the
first, second and third embodiments. In this regard, the coils 2
are wound around the second and fourth magnetic poles 12, 14 in a
second direction opposite to the first direction. Specifically, one
first coil layer 21 and one second coil layer 22 are wound around
the first magnetic pole 11 in the first direction between the
magnetic yoke portion 15 and an end face of the first magnetic pole
11, and the other first coil layer 21 and second coil layer 22 are
wound around the second magnetic pole 12 in the second direction
between the magnetic yoke portion 15 and an end face of the second
magnetic pole 12. If the first direction is a clockwise direction,
the second direction may be a counterclockwise direction, as it can
be readily appreciated by the skilled person.
[0091] Therefore, in the stator of any of the first, second and
third embodiments, if the coil 2 on one magnetic pole is wound in
the first direction, the coil 2 on an adjacent magnetic pole
(magnetic poles 11 and 12 are adjacent, the magnetic poles 12 and
13 are adjacent . . . etc) will be wound in the second direction.
Accordingly, the stator will be able to receive the dual-phased
power for activation and operation.
[0092] Moreover, as discussed previously, the magnetic yoke portion
15 can be coupled with a plurality of magnetic poles having a
quantity being a multiple of 2. Although the stator in each of the
above embodiments is shown to have four magnetic poles, the stator
may also include a fifth magnetic pole and a sixth magnetic pole in
addition to the first, second, third and fourth magnetic poles. The
winding mechanisms of the fifth and sixth magnetic poles may be the
same as those of the first and second magnetic poles. Thus, the
stator can also be a six-pole stator.
[0093] Similarly, as another example, the stator in the disclosure
may also include a fifth magnetic pole, a sixth magnetic pole, a
seventh magnetic pole and an eighth magnetic pole in addition to
the first, second, third and fourth magnetic poles. In this regard,
the winding mechanisms of the fifth, sixth, seventh and eighth
magnetic poles may be the same as those of the first, second, third
and fourth magnetic poles. Therefore, the stator can also be an
eight-pole stator. In other words, according to the stators and
their winding processes discussed above, one having ordinary skill
in the art would readily appreciate the winding mechanisms of any
extra magnetic poles in addition to the discussed first, second,
third and fourth magnetic poles 11, 12, 13, 13. Thus, the stator
can have four, six, eight, ten, twelve or more poles.
[0094] It can be concluded from the above that each magnetic pole
of the stator in the first, second and third embodiments can have a
first-phased coil 2a and a second-phased coil 2b by winding the
magnetic pole with a first coil layer 21 and a second coil layer 22
and forming the first coil layer 21 and the second coil layer 22
with different phases. An electric current generated by the
first-phased power of the dual-phased power may flow through the
first-phased coil 2a, and an electric current generated by the
second-phased power of the dual-phased power may flow through the
second-phased coil 2b. As such, the surge generated on the first
coil layer 21 and the second coil layer 22 during the phase
commutation of the first-phased power and the second-phased power
can be reduced.
[0095] Based on this, as compared with the conventional stator 9
(which is formed by center tapping) where the surge is easily
induced on the coil 96 during the change of the voltage polarities
of the first-phased power and the second-phased power (phase
commutation), the stator in each embodiment of the invention is
able to reduce the surge generated on the first coil layer 21 and
the second coil layer 22 during the phase commutation of the
first-phased power and the second-phased power by winding each
magnetic pole with the first coil layer 21 and the second coil
layer 22 and forming the first coil layer 21 and the second coil
layer 22 with different phases. Advantageously, noise and vibration
of the dual-phased motor using the stator can be reduced.
[0096] Although the invention has been described in detail with
reference to its presently preferable embodiments, it will be
understood by one of ordinary skill in the art that various
modifications can be made without departing from the spirit and the
scope of the invention, as set forth in the appended claims
* * * * *