U.S. patent application number 10/256083 was filed with the patent office on 2004-04-01 for stator with radial winding.
This patent application is currently assigned to Sunonwealth Electric Machine Industry Co., Ltd.. Invention is credited to Hong, Ching-Sheng, Horng, Alex.
Application Number | 20040061405 10/256083 |
Document ID | / |
Family ID | 32029218 |
Filed Date | 2004-04-01 |
United States Patent
Application |
20040061405 |
Kind Code |
A1 |
Horng, Alex ; et
al. |
April 1, 2004 |
STATOR WITH RADIAL WINDING
Abstract
A stator with radial winding invention comprises a single pole
plate formed by punching a plate having excellent conductivity in
magnetism and having an appropriate thickness. The pole plate
includes a central tubular portion defining a central hole. A
plurality of pole arms project from an outer periphery of the
tubular portion and extend radially. Each pole arm terminates at an
edge. At least one pole face projects from each edge and extends
along a direction perpendicular to a plane on which the edge
lies.
Inventors: |
Horng, Alex; (Kaohsiung,
TW) ; Hong, Ching-Sheng; (Kaohsiung, TW) |
Correspondence
Address: |
Bacon & Thomas
4th Floor
625 Slaters Lane
Alexandria
VA
22314
US
|
Assignee: |
Sunonwealth Electric Machine
Industry Co., Ltd.
12F-1, No. 120, Chung-Cheng 1st Road, Lingya Dist.
Kaohsiung
TW
|
Family ID: |
32029218 |
Appl. No.: |
10/256083 |
Filed: |
September 27, 2002 |
Current U.S.
Class: |
310/216.074 |
Current CPC
Class: |
H02K 1/146 20130101 |
Class at
Publication: |
310/216 |
International
Class: |
H02K 001/00 |
Claims
What is claimed is:
1. A stator with radial winding, comprising: a single pole plate
including a central tubular portion defining a central hole, a
plurality of pole arms projecting from an outer periphery of the
tubular portion and extending radially, each said pole arm
terminating at an edge, at least one pole face projecting from each
said edge and extending along a direction perpendicular to a plane
on which the edge lies; and a coil wound around each said pole
arm.
2. The stator with radial winding as claimed in claim 1, wherein
the single pole plate is formed by means of punching a plate.
3. The stator with radial winding as claimed in claim 1, wherein
said at least one pole face is formed on an upper side of each said
edge.
4. The stator with radial winding as claimed in claim 1, wherein
said at least one pole face is formed on an underside of each said
edge.
5. The stator with radial winding as claimed in claim 1, wherein
each said pole face includes a chamfered face.
6. A stator with radial winding, the stator comprising a single
pole plate formed by means of punching a plate, the pole plate
including a central tubular portion defining a central hole, a
plurality of pole arms projecting from an outer periphery of the
tubular portion and extending radially, each said pole arm
terminating at an edge, at least one pole face projecting from each
said edge and extending along a direction perpendicular to a plane
on which the edge lies.
7. The stator with radial winding as claimed in claim 6, wherein
each said pole face includes a chamfered face.
8. The stator with radial winding as claimed in claim 6, wherein
said at least one pole face is formed on an upper side of each said
edge.
9. The stator with radial winding as claimed in claim 6, wherein
said at least one pole face is formed on an underside of each said
edge.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a stator including a single
pole plate having radial winding, the pole plate being formed by
means of punching a plate.
[0003] 2. Description of the Related Art
[0004] FIG. 1 of the drawings illustrates a conventional stator
with radial winding. The stator 90 includes a plurality of
laminated pole plates 91 and coils 92 wound around the pole arms of
the stator 90. The stator 90 includes a central hole 93 for
engaging with an axle tube 94. In manufacture of the stator 90, a
plurality of pole plates 91 are formed by punching, and the pole
plates 91 are then laminated. Thus, manufacture of the stator 90 is
time-consuming and is costly in material.
SUMMARY OF THE INVENTION
[0005] It is the primary object of the present invention to provide
a stator with radial winding, wherein the stator includes a single
pole plate that is formed by means of punching a plate. Thus, the
stator can be easily and rapidly manufactured.
[0006] A stator with radial winding in accordance with the present
invention comprises a single pole plate formed by means of punching
a plate having excellent conductivity in magnetism and having an
appropriate thickness. The pole plate includes a central tubular
portion defining a central hole. A plurality of pole arms project
from an outer periphery of the tubular portion and extend radially.
Each pole arm terminates at an edge. At least one pole face
projects from each edge and extends along a direction perpendicular
to a plane on which the edge lies.
[0007] Other objects, specific advantages, and novel features of
the invention will become more apparent from the following detailed
description and preferable embodiments when taken in conjunction
with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is an exploded perspective view of a conventional
stator with radial winding.
[0009] FIG. 2 is a perspective view, partly cutaway, of a first
embodiment of a stator with radial winding in accordance with the
present invention.
[0010] FIG. 3 is a sectional view of the stator in FIG. 2 and a
casing with an axle tube to which the stator is mounted.
[0011] FIG. 4 is a perspective view, partly cutaway, of a second
embodiment of the stator with radial winding in accordance with the
present invention.
[0012] FIG. 5 is a sectional view of the stator in FIG. 4 and a
casing with an axle tube to which the stator is mounted.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] Preferred embodiments in accordance with the present
invention will now be described with reference to the accompanying
drawings.
[0014] Referring to FIG. 2, a first embodiment of a stator with
radial winding in accordance with the present invention includes a
single pole plate 1 made of a material with excellent conductivity
in magnetism. The pole plate 1 is formed by means of punching a
plate with an appropriate thickness. The pole plate 1 includes a
central tubular portion 11 defining a central hole 10 and a
plurality of pole arms 12 projecting from an end of an outer
periphery of the central tubular portion 11 and extending radially.
Each pole arm 12 terminates at an edge 13 extending along a
circumferential direction and having an appropriate length. At
least one pole face 14 projects from each edge 13 and extends along
a direction perpendicular to a plane on which the edge 13 lies. In
this embodiment, a pole face 14 is formed on an underside of each
edge 13 and extends along a direction perpendicular to the plane on
which the edge 13 lies, and another pole face 14 is formed on an
upper side of each edge 13 and extends along a direction
perpendicular to the plane on which the edge 13 lies. Each pole
face 14 includes two end faces 141 and 142 of different heights. In
this embodiment, the end face 142 has a chamfered face 143, which
prevents a rotor located around the pole faces 14 from staying
within a dead angle, thereby allowing easy starting of the
rotor.
[0015] FIG. 3 illustrates assembly of the first embodiment of the
stator in accordance with the present invention. The central
tubular portion 11 of the pole plate 1 of the stator is securely
mounted around an axle tub 2 of a casing or the like. A coil 3 is
wound around each pole arm 12. When the coils 3 mounted around the
pole arms 12 are energized, the pole faces 14 of the pole plate 1
generate magnetic forces that are repulsive to a permanent magnet
mounted to the rotor, thereby driving the rotor to which the
permanent magnet is mounted.
[0016] FIG. 4 illustrates a second embodiment of the stator with
radial winding in accordance with the present invention. The stator
includes a single pole plate 4 made of a material with excellent
conductivity in magnetism. The pole plate 4 is formed by means of
punching a plate with an appropriate thickness. The pole plate 4
includes a central tubular portion 41 defining a central hole 40
and a plurality of pole arms 42 projecting from an end of an outer
periphery of the central tubular portion 41 and extending radially.
Each pole arm 4 terminates at an edge 43 extending along a
circumferential direction and having an appropriate length. At
least one pole face 44 projects from each edge 43 and extends along
a direction perpendicular to a plane on which the edge 43 lies. In
this embodiment, two pole faces 44 are formed on an underside of
each edge 43 and extends along a direction perpendicular to the
plane on which the edge 43 lies, and two pole faces 44 are formed
on an upper side of each edge 43 and extends along a direction
perpendicular to the plane on which the edge 43 lies. Each pole
face 44 includes two end faces of different heights. In this
embodiment, each pole face 44 has a chamfered face 45, which
prevents a rotor located around the pole faces 44 from staying
within a dead angle, thereby allowing easy starting of the
rotor.
[0017] FIG. 5 illustrates assembly of the second embodiment of the
stator in accordance with the present invention. The central
tubular portion 41 of the pole plate 4 of the stator is securely
mounted around an axle tub 2 of a casing or the like. A coil 3 is
wound around each pole arm 42. When the coils 3 mounted around the
pole arms 42 are energized, the pole faces 44 of the pole plate 4
generate magnetic forces that are repulsive to a permanent magnet
mounted to the rotor, thereby driving the rotor to which the
permanent magnet is mounted.
[0018] According to the above description, it is appreciated that
the stator in accordance with the present invention includes a
single pole plate 1, 4 that can be easily and rapidly formed. Since
the edge 13, 43 of each pole arm 12, 42 of the pole plate 1, 4
includes upright pole faces 14, 44, an excellent magnetic induction
effect is provided for the pole plate 1, 4 and the permanent magnet
on the rotor while providing improved repulsive effect for driving
the rotor to turn. Further, the central tubular portion 11, 41 of
the pole plate 1, 4 allows easy positioning of the pole plate 1,
4.
[0019] Although the invention has been explained in relation to its
preferred embodiment as mentioned above, it is to be understood
that many other possible modifications and variations can be made
without departing from the scope of the invention. It is,
therefore, contemplated that the appended claims will cover such
modifications and variations that fall within the true scope of the
invention.
* * * * *