CN216290473U - Heat radiation structure of permanent magnet direct current motor - Google Patents
Heat radiation structure of permanent magnet direct current motor Download PDFInfo
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- CN216290473U CN216290473U CN202122941395.3U CN202122941395U CN216290473U CN 216290473 U CN216290473 U CN 216290473U CN 202122941395 U CN202122941395 U CN 202122941395U CN 216290473 U CN216290473 U CN 216290473U
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Abstract
The utility model provides a heat dissipation structure of a permanent magnet direct current motor, aims to solve the problem of poor heat dissipation of a motor driving circuit system, and relates to the technical field of motors. The utility model provides a permanent magnet direct current motor's heat radiation structure, includes motor main part, dirver circuit board and the filter capacitance who is connected with dirver circuit board electricity, be equipped with the wind-guiding passageway that dispels the heat cooling and use to the surface of casing between fan blade cover and the casing, the circuit board mounting panel has set firmly on the casing, dirver circuit board installs the one side at the circuit board mounting panel casing dorsad, the circuit board mounting panel is equipped with the multi-disc heat dissipation rib towards one side of casing, and is adjacent be equipped with the interval in order to form air channel between the heat dissipation rib, air channel's one end and wind-guiding passageway's air-out end are accepted the setting mutually. The utility model better ensures the working stability and the service life of the driving circuit system.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a heat dissipation structure of a permanent magnet direct current motor.
Background
The permanent magnet direct current motor is composed of a motor main body and a driving circuit system used for driving a rotor of the motor main body to rotate and controlling the rotating speed of the rotor of the motor main body, and is a typical electromechanical integrated product. The permanent magnet direct current motor comprises a brushless permanent magnet direct current motor and a brush permanent magnet direct current motor. The driving circuit system of the permanent magnet direct current motor comprises a driving circuit board integrated by electronic devices, chips and the like, the conventional permanent magnet direct current motor is generally directly supplied with alternating current, and the driving circuit system further comprises a filter capacitor electrically connected with the driving circuit board. The permanent magnet direct current motor has the advantages of the traditional direct current motor, simultaneously cancels a carbon brush and a slip ring structure, has the characteristics of excellent torque characteristic, stepless speed regulation, wide speed regulation range, high efficiency, good stability, low relative cost, simplicity, easy use and the like, and is widely used by various manufacturers.
Application No.: 202020973352.6 discloses a DC brushless motor driving system for a cook machine, which comprises a power module, a speed regulation interface module for receiving a speed-up command, a speed regulation chip capable of outputting a PWM control signal according to the speed-up command, and an IPM inverter module capable of increasing the output phase current according to the PWM control signal; the input end of the power supply module is connected with alternating current to convert the changed alternating current into direct current, and the output end of the power supply module is respectively connected with the IPM inversion module and the speed regulation chip; the output end of the speed regulation interface module is connected with the speed regulation chip and outputs the received speed regulation instruction to the speed regulation chip; the output end of the speed regulation chip is connected with the IPM inversion module and outputs a PWM control signal; the output end of the IPM inversion module is connected with the stator winding so as to enhance the phase current of the stator winding and accelerate the rotor flux weakening of the motor. As the permanent magnet direct current motor is popularized in a large number of agricultural machinery, such as rice mills and crushers, the power requirement on the permanent magnet direct current motor is higher and higher, the current in a driving circuit system of the motor is correspondingly increased, and the heat generated by the driving circuit system is greatly increased. The existing direct current motor usually arranges a drive circuit system on a shell of a motor main body, and the heat dissipation problem of the motor drive circuit system is not considered, so that the temperature of the motor, particularly the temperature of an electric drive circuit system is overhigh, and the working stability and the service life of electronic devices on the drive circuit are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a heat dissipation structure of a permanent magnet direct current motor, so as to solve the problem of poor heat dissipation of a motor driving circuit system.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a permanent magnet direct current motor's heat radiation structure, includes motor main part, dirver circuit board and the filter capacitance who is connected with dirver circuit board electricity, motor main part includes the casing and sets up the rotor in the casing, the fan blade is installed to the one end of rotor, install the fan blade cover on the casing, be equipped with the wind-guiding passageway that cools off usefulness of dispelling the heat to the surface of casing between fan blade cover and the casing, the circuit board mounting panel has set firmly on the casing, dirver circuit board installs the one side of circuit board mounting panel casing dorsad, the circuit board mounting panel is equipped with multi-disc heat dissipation rib towards one side of casing, and is adjacent be equipped with the interval in order to form air channel between the heat dissipation rib, air channel's one end and wind-guiding passageway's air-out end are accepted the setting.
Further, the circuit board mounting plate is connected with the casing through bolts, and a rubber shock pad is arranged between the circuit board mounting plate and the casing.
Further, the arrangement direction of the heat dissipation ribs is parallel to the axial direction of the casing.
Furthermore, the circuit board mounting plate is provided with a junction box covering the driving circuit board.
Further, the circuit board mounting plate is an aluminum plate.
Further, the outside of casing is equipped with the capacitor cover, filter capacitor installs by in the synthetic electric capacity installation cavity is enclosed with the casing to the capacitor cover, the surface of casing is equipped with many and sets up and pass the heat dissipation muscle of electric capacity installation cavity along casing axis direction, form electric capacity cooling channel between the heat dissipation muscle.
The utility model has the beneficial effects that: according to the heat dissipation structure of the permanent magnet direct current motor, the plurality of heat dissipation ribs are arranged on one side, facing the shell, of the circuit board mounting plate, airflow generated by the fan blades of the motor passes through the heat dissipation ribs, the circuit board mounting plate and the driving circuit board are cooled while the shell is cooled, the problem of poor heat dissipation of a motor driving circuit system is solved, and the working stability and the service life of the driving circuit system are better guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 taken along A-A;
FIG. 3 is a schematic view of the mounting of the circuit board mounting plate;
shown in the figure: the air-cooling type air conditioner comprises a driving circuit board 2, a filter capacitor 3, a machine shell 11, a rotor 12, fan blades 13, a fan blade cover 14, an air guide channel 15, a circuit board mounting plate 16, a rubber shock pad 17, a capacitor mounting cavity 41, a capacitor cooling channel 42, a heat dissipation rib 111, a heat dissipation rib 161 and an air channel 162.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
As shown in fig. 1 to 3, the heat dissipation structure of a permanent magnet dc motor according to the present invention includes a motor main body, a driving circuit board 2, and a filter capacitor 3 electrically connected to the driving circuit board 2, where the motor main body includes a casing 11, and a rotor 12 and a stator which are disposed in the casing 11, a fan blade 13 is mounted at one end of the rotor 12, a fan blade cover 14 is mounted on the casing 11, a wind guide channel 15 for performing heat dissipation and cooling on the surface of the casing 11 is disposed between the fan blade cover 14 and the casing 11, and the wind guide channel 15 allows an airflow generated by the fan blade 13 to flow through the surface of the casing along an axial direction of the casing 11. The structure is the same as that of the existing motor. In order to facilitate heat dissipation of the motor, especially the driving system, the casing 11 is fixedly provided with a circuit board mounting plate 16, the driving circuit board 2 is mounted on one side of the circuit board mounting plate 16, which is opposite to the casing 11, the circuit board mounting plate 16 is provided with a plurality of heat dissipation ribs 161 on one side facing the casing 11, a space is formed between adjacent heat dissipation ribs 161 to form an air channel 162, and one end of the air channel 162 is connected with an air outlet end of the air guide channel 15. The driving circuit board 2 can be mounted on the circuit board mounting plate 16 by conventional methods such as bolting, clamping, etc.
When the motor works, the rotor 12 rotates to drive the fan blades 13 to rotate, the fan blades 13 generate air flow, and the air flow flows through the surface of the machine shell along the axial direction of the machine shell 11 under the action of the air guide channel 15 to dissipate heat and cool the machine shell. Since the driver circuit board 2 is mounted on the circuit board mounting board 16, the heat of the driver circuit board 2 can be transferred to the circuit board mounting board 16. Since one end of the air channel 162 is connected to the air outlet end of the air guiding channel 15, the air flowing along the surface of the housing enters the air channel 162 from one end of the air channel 162 and passes through the air channel 162. The air current is at the in-process through air channel 162 with heat dissipation rib 161 and the contact of circuit board mounting panel 16 towards one side of casing 11 to carry out cooling to circuit board mounting panel 16, so, can prevent that too high temperature's condition from appearing in dirver circuit board 2, can improve the job stabilization nature and the life of the electron device on dirver circuit board 2.
The circuit board mounting plate 16 may be mounted to the housing using conventional attachment means such as soldering, riveting, bolting, etc. In the embodiment of the utility model, the circuit board mounting plate 16 is connected with the casing 11 through bolts so as to be convenient to disassemble, and a rubber shock pad 17 is arranged between the circuit board mounting plate 16 and the casing 11. The purpose of the rubber shock pad is to reduce the influence of the vibration of the motor on the driving circuit board 2 during operation, and meanwhile, the rubber shock pad can also play a certain heat insulation role, so that the influence of higher temperature generated during the operation of the motor rotor and the stator on the driving circuit board 2 can be reduced, and the service life of the driving circuit board 2 is further prolonged.
The heat dissipation ribs 161 may be disposed in a direction parallel to or at an angle to the axial direction of the cabinet 11, and preferably, the heat dissipation ribs 161 are disposed in a direction parallel to the axial direction of the cabinet 11. The arrangement direction of the heat dissipation ribs 161 is parallel to the axial direction of the casing 11, which is more beneficial for the fan blades 13 to generate airflow to pass through between the heat dissipation ribs 161 (the air channels 162), and can improve the cooling effect.
In the present invention, the circuit board mounting plate 16 is provided with a terminal box 18 covering the driving circuit board 2 to protect the driving circuit board 2.
In the present invention, the circuit board mounting plate 16 is preferably an aluminum plate having good thermal conductivity. In some embodiments, the circuit board mounting plate 16 also employs a slightly less thermally conductive iron plate, plastic plate, or the like.
The filter capacitor 3 can be mounted on the driving circuit board 2, and because the heat generated by the filter capacitor 3 is large, if the filter capacitor is mounted on the driving circuit board 2, the filter capacitor has a large influence on other electronic devices on the driving circuit board 2. In the utility model, the capacitance cover 4 is arranged on the outer side of the machine shell 11, and in the figure, the capacitance cover 4 is arranged on the machine shell 11 in a bolt connection mode. The filter capacitor 3 is installed in a capacitor installation cavity 41 formed by enclosing the capacitor cover 4 and the machine shell 11, a plurality of radiating ribs 111 arranged along the axial direction of the machine shell 11 and penetrating through the capacitor installation cavity 41 are arranged on the surface of the machine shell 11, and a capacitor cooling channel 42 is formed between the radiating ribs 111. In the above structure, one or more filter capacitors 3 may be installed in one capacitor cover 4, and may be specifically selected according to the amount of heat generated by the filter capacitors 3. When the motor works, partial airflow generated by the fan blades 13 flows along the capacitor cooling channel 42 formed between the heat dissipation ribs 111, enters the capacitor mounting cavity 41 from one end of the capacitor mounting cavity 41, and then flows out from the other end of the capacitor mounting cavity, and the airflow cools the casing and simultaneously takes away partial hot air in the capacitor mounting cavity 41, so that the filter capacitor 3 can be cooled. Above-mentioned structure sets up filter capacitor 3 alone on the casing to set up on the casing and constitute electric capacity cooling channel 42 by heat dissipation muscle 111, so, can utilize the fan blade of motor to carry out cooling of cooling down alone to drive system's filter capacitor 3, further reduce drive circuit system's temperature, guarantee drive circuit system each electron device's job stabilization nature and life.
Claims (6)
1. The utility model provides a permanent magnetism direct current motor's heat radiation structure, includes motor main part, dirver circuit board (2) and filter capacitor (3) be connected with dirver circuit board (2) electricity, motor main part includes casing (11) and rotor (12) of setting in casing (11), fan blade (13) are installed to the one end of rotor (12), install fan blade cover (14) on casing (11), be equipped with wind-guiding passageway (15) that cool off the surface of casing (11) and carry out heat dissipation and use between fan blade cover (14) and casing (11), its characterized in that: set firmly circuit board mounting panel (16) on casing (11), one side in circuit board mounting panel (16) casing (11) dorsad is installed in dirver circuit board (2), circuit board mounting panel (16) are equipped with multi-disc heat dissipation rib (161) towards one side of casing (11), and are adjacent be equipped with the interval in order to form air duct (162) between heat dissipation rib (161), the one end of air duct (162) is held with the air-out end of wind-guiding passageway (15) and is accepted the setting.
2. The heat dissipation structure of a permanent magnet direct current motor according to claim 1, characterized in that: the circuit board mounting plate (16) is connected with the casing (11) through bolts, and a rubber shock pad (17) is arranged between the circuit board mounting plate (16) and the casing (11).
3. The heat dissipation structure of a permanent magnet direct current motor according to claim 1, characterized in that: the arrangement direction of the heat dissipation ribs (161) is parallel to the axial direction of the machine shell (11).
4. The heat dissipation structure of a permanent magnet direct current motor according to claim 1, characterized in that: and the circuit board mounting plate (16) is provided with a junction box (18) which covers the driving circuit board (2).
5. The heat dissipation structure of a permanent magnet direct current motor according to claim 1, characterized in that: the circuit board mounting plate (16) is an aluminum plate.
6. The heat dissipation structure of a permanent magnet direct current motor according to any one of claims 1 to 5, characterized in that: the outside of casing (11) is equipped with capacitor cover (4), filter capacitor (3) install by in capacitor cover (4) and casing (11) enclose synthetic electric capacity installation cavity (41), the surface of casing (11) is equipped with many and sets up and pass heat dissipation muscle (111) of electric capacity installation cavity (41) along casing (11) axis direction, form electric capacity cooling channel (42) between heat dissipation muscle (111).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122860907 | 2021-11-19 | ||
| CN2021228609073 | 2021-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216290473U true CN216290473U (en) | 2022-04-12 |
Family
ID=81040032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122941395.3U Active CN216290473U (en) | 2021-11-19 | 2021-11-24 | Heat radiation structure of permanent magnet direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216290473U (en) |
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2021
- 2021-11-24 CN CN202122941395.3U patent/CN216290473U/en active Active
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