U.S. patent application number 13/016955 was filed with the patent office on 2012-08-02 for linear motor mover with heat dissipation unit.
Invention is credited to Wei-Lin Chang, Bo-Sheng Huang.
Application Number | 20120194007 13/016955 |
Document ID | / |
Family ID | 46576757 |
Filed Date | 2012-08-02 |
United States Patent
Application |
20120194007 |
Kind Code |
A1 |
Chang; Wei-Lin ; et
al. |
August 2, 2012 |
LINEAR MOTOR MOVER WITH HEAT DISSIPATION UNIT
Abstract
A linear motor mover with heat dissipation unit includes: a base
seat; a mover having several coils sequentially upright arranged
with first ends of the coils disposed in the base seat; a heat
dissipation unit having a hollow and substantially slat-shaped
cooling section, one face of the cooling section being immediately
adjacent to second ends of the coils opposite to the base seat,
whereby the heat generated by the coils during operation of the
mover can be conducted from the coils to the cooling section, the
cooling section containing a cooling fluid therein, the cooling
fluid flowing within an interior of the cooling section to carry
away the heat absorbed by the cooling section; and an insulation
section disposed between the heat dissipation unit and the coils.
With the heat dissipation unit, the linear motor has better heat
dissipation efficiency and driving efficiency and is assembled at
lower cost.
Inventors: |
Chang; Wei-Lin; (US)
; Huang; Bo-Sheng; (US) |
Family ID: |
46576757 |
Appl. No.: |
13/016955 |
Filed: |
January 28, 2011 |
Current U.S.
Class: |
310/12.29 |
Current CPC
Class: |
H02K 9/22 20130101; H02K
41/031 20130101; H02K 9/19 20130101; H02K 3/47 20130101 |
Class at
Publication: |
310/12.29 |
International
Class: |
H02K 41/02 20060101
H02K041/02 |
Claims
1. A linear motor mover with heat dissipation unit, comprising: a
base seat; a mover having several coils, the coils being
sequentially upright arranged with first ends of the coils disposed
in the base seat; a heat dissipation unit having a hollow cooling
section, the cooling section being substantially slat-shaped, one
face of the cooling section being immediately adjacent to second
ends of the coils opposite to the base seat, whereby the heat
generated by the coils during operation of the mover can be
conducted from the coils to the cooling section, the cooling
section containing a cooling fluid therein, which flows within an
interior of the cooling section to carry away the heat absorbed by
the cooling section; and an insulation section disposed between the
heat dissipation unit and the coils.
2. The linear motor mover with heat dissipation unit as claimed in
claim 1, wherein the cooling section has a first contact face
adjacent to the second ends of the coils and a second contact face
in contact with the atmosphere.
3. The linear motor mover with heat dissipation unit as claimed in
claim 1, wherein the cooling section is reverse U-shaped.
4. The linear motor mover with heat dissipation unit as claimed in
claim 1, wherein the heat dissipation unit further has a water
inlet pipe with a predetermined length and a water outlet pipe with
a predetermined length, first ends of the water inlet pipe and the
water outlet pipe communicating with two ends of the cooling
section respectively, second ends of the water inlet pipe and the
water outlet pipe being passed through predetermined sections of
the base seat respectively.
5. The linear motor mover with heat dissipation unit as claimed in
claim 4, wherein the base seat has a main body, the main body
having an insertion channel formed on a predetermined section of
the main body, the coils being upright arranged in the insertion
channel, two through holes being respectively formed at two ends of
the main body to connect with the second ends of the water inlet
pipe and the water outlet pipe.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to a linear motor
mover structure, and more particularly to a linear motor mover with
heat dissipation unit.
[0003] 2. Description of the Related Art
[0004] A conventional linear motor is composed of a stator and a
mover. The linear motor works in a basic principle that a magnetic
field varies between the mover and the stator to linearly drive the
mover. The mover can be driven directly by means of the magnetic
field without any additional transmission mechanism. Accordingly,
the linear motor has the advantages of high precision, low
frictional loss, high driving efficiency, low noise and low failure
ratio. Therefore, linear motors are widely applied to various
industrial machines or equipments. The mover of the linear motor
serves to drive the machine or equipment to linearly move at high
precision. The linear motor is advantageous over the traditional
motor in many respects. However, the mover will generate heat in
operation to lower the efficiency of the linear motor.
[0005] Most of the linear motors are equipped with heat dissipation
units for effectively carrying away the heat and lowering operation
temperature of the coils. As for the current techniques, the linear
motors are generally equipped with air-cooled units with
cooperative radiating fins or cooling fans or water-cooled units
for dissipating the heat. Among these measures, the water-cooled
units can achieve best heat dissipation effect. FIG. 1 shows a
linear motor in which the coils 1 are arranged in a tilted state by
a predetermined angle. A water-cooled pipe 2 is passed through the
coils 1 to carry away the heat from the coils 1. Since the coils 1
are arranged in the tilted state, the magnetic flux of the coils 1
is lower. Moreover, it is difficult to assemble the coils 1 and
manufacture the linear motor. In addition, the water-cooled pipe 2
is not in direct contact with the air so that the heat exchange
rate between the water-cooled pipe 2 and the air is poor. As a
result, such heat dissipation unit of the linear motor can hardly
provide satisfactory heat dissipation effect.
SUMMARY OF THE INVENTION
[0006] It is therefore a primary object of the present invention to
provide a linear motor mover with heat dissipation unit. The heat
dissipation unit is a water-cooled unit having a surface in direct
contact with air. Therefore, the heat dissipation efficiency of the
linear motor is effectively enhanced.
[0007] It is a further object of the present invention to provide
the above linear motor mover with heat dissipation unit, in which
the coils have higher magnetic flux.
[0008] It is still a further object of the present invention to
provide the above linear motor mover with heat dissipation unit,
which can be easily assembled to shorten working time and lower
labor cost.
[0009] To achieve the above and other objects, the linear motor
mover with heat dissipation unit of the present invention includes:
a base seat; a mover having several coils sequentially upright
arranged with first ends of the coils disposed in the base seat; a
heat dissipation unit having a hollow and substantially slat-shaped
cooling section, one face of the cooling section being immediately
adjacent to second ends of the coils opposite to the base seat,
whereby the heat generated by the coils during operation of the
mover can be conducted from the coils to the cooling section, the
cooling section containing a cooling fluid therein, the cooling
fluid flowing within an interior of the cooling section to carry
away the heat absorbed by the cooling section; and an insulation
section disposed between the heat dissipation unit and the
coils.
[0010] The present invention can be best understood through the
following description and accompanying drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a view of a conventional linear motor;
[0012] FIG. 2 is a perspective exploded view of a preferred
embodiment of the present invention;
[0013] FIG. 3 is a perspective assembled view of the preferred
embodiment of the present invention; and
[0014] FIG. 4 is a sectional view taken along line 4-4 of FIG.
3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0015] Please refer to FIGS. 2 to 4. According to a preferred
embodiment, the linear motor mover 10 with heat dissipation unit of
the present invention mainly includes a base seat 20, a mover 30, a
heat dissipation unit 40 and an insulation section 50.
[0016] The base seat 20 has an elongated main body 21. The main
body 21 has an elongated insertion channel 22 lengthwise formed on
the main body 21. Two through holes 23 are respectively formed
through two ends of the main body 21.
[0017] The mover 30 has several coils 31. The coils 31 are
sequentially upright arranged with their bottom ends inlaid in the
insertion channel 22.
[0018] The heat dissipation unit 40 has a hollow cooling section
41. The cooling section 41 is reverse U-shaped and is capped on top
ends of the coils 31 opposite to the base seat 20. Cooling fluid
can flow through the cooling section 41 to carry away the heat
generated by the coils 31 during operation of the mover 30. The
heat dissipation unit 40 further has a water inlet pipe 42 with a
predetermined length and a water outlet pipe 43 with a
predetermined length. First ends of the water inlet pipe 42 and the
water outlet pipe 43 communicate with two ends of the cooling
section 41 respectively. Second ends of the water inlet pipe 42 and
the water outlet pipe 43 are connected to the through holes 23
respectively.
[0019] The cooling section 41 includes a first contact face 411
immediately adjacent to the coils 31 and a second contact face 412
directly in contact with air for enhancing heat exchange between
the cooling section 41 and the air.
[0020] The insulation section 50 is disposed between the heat
dissipation unit 40 and the coils 31.
[0021] According to the above arrangement, the cooling section 41
is capped on predetermined sections of the coils 31. The cooling
fluid can flow from the water inlet pipe 42 into the cooling
section 41 and flow through the cooling section 41 and then flow
out from the water outlet pipe 43. Accordingly, the cooling fluid
can continuously circulate within the heat dissipation unit 40 to
effectively carry away the heat generated by the coils 31 during
operation of the mover 30. This can enhance operation efficiency of
the linear motor and prolong the lifetime thereof.
[0022] The first contact face 411 of the cooling section 41
directly contacts with the respective coils 31 by a large area so
that the heat is conducted from the coils 31 to the cooling section
41 at high efficiency. Moreover, the second contact face 412
directly contacts with the air to enhance heat exchange between the
cooling section 41 and the air, whereby the heat can be quickly
carried away from the coils 31.
[0023] In addition, the insulation section 50 is disposed at the
junction between the heat dissipation unit 40 and the coils 31 to
keep a stable electrical performance.
[0024] In the linear motor mover 10 with heat dissipation unit of
the present invention, the cooling section 41 is directly capped on
the coils 31. In this case, the coils 31 can be directly upright
arranged in the base seat 20 without being tilted. In the
conventional linear motor, the coils are positioned in a tilted
state. In comparison with the conventional linear motor, the coils
31 of the present invention are upright arranged in the base seat
20. As for the coils with the same size, the upright ones have
better magnetic flux than the tilted ones. Moreover, the mover with
the upright coils can be more easily assembled.
[0025] It should be further noted that:
[0026] First, the size of the cooling section can be enlarged or
minified according to the number of the coils of the mover.
Therefore, the use of the cooling section is not limited by the
number of the coils of the mover.
[0027] Second, the coils can be more securely located in their true
positions by means of filling an adhesive around the coils or
painting a resin around the coils or in any other manner that can
securely locate the coils in their true positions.
[0028] Third, in the above embodiment, cooling water is used as a
medium for dissipating the heat. However, the medium for
dissipating the heat is not limited to the cooling water.
Alternatively, any other suitable fluid can be used instead of the
cooling water to flow within the interior of the cooling section.
This can achieve the same heat dissipation effect.
[0029] The above embodiments are only used to illustrate the
present invention, not intended to limit the scope thereof. Many
modifications of the above embodiments can be made without
departing from the spirit of the present invention.
* * * * *