A compact permanent magnet motor with electric control frequency conversion and integrated cooling structure

Abstract

The present invention relates to the field of permanent magnet motor cooling technology, and in particular to a permanent magnet motor with a compact electric control frequency conversion integrated cooling structure, comprising a permanent magnet motor body, a drive circuit board for controlling the permanent magnet motor body, a control circuit board and a power supply circuit board. The permanent magnet motor with a compact electric control frequency conversion integrated cooling structure of the present invention can greatly reduce the impact of the permanent magnet motor on the control circuit and improve the safety of the control mechanism by using a bottom-mounted shock-absorbing seat with a split structural design to install the drive circuit board, the control circuit board and the power supply circuit board; a multi-directional shock-absorbing mechanism is used to support the permanent magnet motor body to improve the shock absorption and stability of the bottom side of the permanent magnet motor body; a lateral active cooling mechanism is fixedly installed on the outside of the permanent magnet motor body, and the heat dissipation performance of the entire permanent magnet motor and the control circuit can be improved through the lateral active cooling mechanism, greatly improving the stability of the motor.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet motor cooling, in particular to a permanent magnet motor with a compact electric control frequency conversion integrated cooling structure. Background Art

[0002] Permanent magnet motor, also known as permanent magnet synchronous motor, uses permanent magnets to provide excitation, which simplifies the internal structure of the motor, thereby reducing processing and assembly costs, eliminating collector rings and brushes that are prone to problems, and improving the reliability of motor operation. Moreover, because no excitation current is required and there is no excitation loss, the efficiency and power density of the motor are improved.

[0003] Permanent magnet motors are mainly composed of stators, rotors, end covers and other components. During operation, permanent magnet motors will generate a lot of heat and vibration. The current permanent magnet motors only passively dissipate heat through the external cover, and the heat dissipation and vibration reduction methods are very limited. Moreover, when the permanent magnet motor is abnormal, the temperature and vibration will soar, and the motor control device cannot quickly control the frequency conversion in real time, resulting in very limited safety. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the current permanent magnet motor only performs passive heat dissipation through an external cover, and the heat dissipation and vibration reduction methods are very limited, and the safety is also very limited.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a compact permanent magnet motor with an electric control frequency conversion integrated cooling structure, comprising a permanent magnet motor body, a drive circuit board for controlling the permanent magnet motor body, a control circuit board and a power supply circuit board, a bottom-mounted shock-absorbing seat for mounting the drive circuit board, the control circuit board and the power supply circuit board is arranged on the lower surface of the permanent magnet motor body, and a lateral active cooling mechanism is fixedly mounted on the outer side of the permanent magnet motor body;

[0006] The bottom-mounted shock-absorbing seat includes a bottom mounting seat, a lateral bolt fixing frame fixed on the outer side of the bottom mounting seat, an internal mounting chamber opened in the bottom mounting seat, a copper heat-conducting plate bolted to the top surface of the internal mounting chamber, an internal assembly box fixed to the lower surface of the copper heat-conducting plate, a bottom closing sealing plate fixed to the lower opening position of the internal mounting chamber, an arc-shaped assembly bracket fixed on both sides of the upper surface of the bottom mounting seat, and a multi-directional shock-absorbing mechanism installed inside the arc-shaped assembly bracket.

[0007] The lower surface of the permanent magnet motor body is provided with an arc-shaped bottom assembly groove matched with the arc-shaped assembly bracket.

[0008] The lateral active cooling mechanism includes lateral heat dissipation blades fixed on the outside of the permanent magnet motor body, an integral lateral heat dissipation copper tube fixed on the outer side of the lateral heat dissipation blades, an arc-shaped connecting tube installed on the arc-shaped surface of the outer side of the permanent magnet motor body, an annular cover installed on the outer side of the permanent magnet motor body, and a centrifugal liquid pump installed inside the annular cover.

[0009] The multi-directional shock absorbing mechanism comprises a multi-directional shock absorbing spring installed on the arc surface of the upper end of the arc-shaped assembly bracket and a transverse shock absorbing spring installed on the lateral plane of the arc-shaped assembly bracket.

[0010] An inner positioning groove matching with the multi-directional damping spring and the transverse damping spring is provided on the inner side of the arc-shaped bottom assembly groove. The inner positioning groove of the arc-shaped bottom assembly groove corresponding to the transverse damping spring is connected to the inside of the lateral heat dissipation copper tube.

[0011] The transverse damping spring is provided with a built-in flexible flow guide pipe for connecting the lateral heat dissipation copper pipe and the internal installation chamber.

[0012] A lateral liquid guide channel for connecting the arc-shaped connecting pipe and the internal installation chamber is provided on the inner side surface of the annular cover shell.

[0013] A temperature sensor controller and a vibration sensor controller are fixedly mounted on the inner side surface of the internal mounting chamber.

[0014] An electromagnet matched with a multi-directional damping spring is fixedly mounted inside the inner positioning groove on the inner arc side of the arc-shaped bottom mounting groove.

[0015] The beneficial effects of the present invention are:

[0016] (1) A compact electric-controlled variable-frequency integrated cooling structure permanent magnet motor of the present invention can greatly reduce the impact of the permanent magnet motor on the control circuit and improve the safety of the control mechanism by installing the drive circuit board, the control circuit board and the power supply circuit board with a bottom-mounted shock-absorbing seat with a split structure design;

[0017] (2) A multi-directional shock absorbing mechanism is used to support the permanent magnet motor body to improve the shock absorption and stability of the bottom side of the permanent magnet motor body;

[0018] (3) A lateral active cooling mechanism is fixedly installed on the outside of the permanent magnet motor body. The lateral active cooling mechanism can improve the heat dissipation performance of the entire permanent magnet motor and the control circuit, greatly improving the stability of the motor;

[0019] (4) The detachable structure design can effectively reduce the cost of later use;

[0020] (5) The built-in structural design can improve the durability and safety of the equipment;

[0021] (6) By monitoring the temperature and vibration of the permanent magnet motor, the operating state of the permanent magnet motor can be adjusted to ensure the stability of the operating state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the assembly end of the multi-directional shock absorbing structure in the present invention.

[0026] In the figure, 1. permanent magnet motor body, 2. drive circuit board, 3. control circuit board, 4. power supply circuit board, 5. bottom mounting seat, 6. lateral bolt fixing frame, 7. internal mounting chamber, 8. copper heat conducting plate, 9. internal assembly box, 10. bottom closed sealing plate, 11. arc-shaped assembly bracket, 12. arc-shaped bottom assembly groove, 13. lateral heat dissipation blades, 14. lateral heat dissipation copper tube, 15. arc-shaped connecting tube, 16. annular cover, 17. centrifugal liquid pump, 18. multi-directional shock-absorbing spring, 19. lateral shock-absorbing spring, 21. built-in flexible guide tube, 22. lateral liquid guide channel, 23. temperature sensor controller, 24. vibration sensor controller, 25. electromagnet. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Figure 1 , Figure 2 and Figure 3A compact permanent magnet motor with an electric control frequency conversion integrated cooling structure is shown, comprising a permanent magnet motor body 1, a driving circuit board 2, a control circuit board 3 and a power supply circuit board 4 for controlling the permanent magnet motor body 1, a bottom-mounted shock-absorbing seat for mounting the driving circuit board 2, the control circuit board 3 and the power supply circuit board 4 is provided on the lower surface of the permanent magnet motor body 1, and a lateral active cooling mechanism is fixedly mounted on the outer side of the permanent magnet motor body 1;

[0030] In order to cooperate with internal heat conduction and assembly, the bottom shock-absorbing seat includes a bottom mounting seat 5, a lateral bolt fixing frame 6 fixed on the outer side of the bottom mounting seat 5, an internal mounting chamber 7 opened in the bottom mounting seat 5, a copper heat conducting plate 8 bolted on the top surface of the internal mounting chamber 7, an internal assembly box 9 fixed on the lower surface of the copper heat conducting plate 8, a bottom closed sealing plate 10 fixed at the lower opening position of the internal mounting chamber 7, an arc-shaped assembly bracket 11 fixed on both sides of the upper surface of the bottom mounting seat 5, and a multi-directional shock-absorbing mechanism installed inside the arc-shaped assembly bracket 11.

[0031] The driving circuit board 2, the control circuit board 3 and the power supply circuit board 4 are all existing technologies. They are fixed inside the internal assembly box 9 by stacking. A rubber sealing frame is set on the upper connecting surface of the internal assembly box 9, and then the bolts located on the outside of the internal assembly box 9 are screwed into the threaded assembly holes inside the copper heat conducting plate 8 to fix the assembly.

[0032] In order to cooperate with the bottom assembly, the lower surface of the permanent magnet motor body 1 is provided with an arc-shaped bottom assembly groove 12 that matches the arc-shaped assembly bracket 11 .

[0033] In order to cooperate with the external heat dissipation, the lateral active cooling mechanism includes a lateral heat dissipation blade 13 fixed on the outside of the permanent magnet motor body 1, an integral lateral heat dissipation copper tube 14 fixed on the outer side of the lateral heat dissipation blade 13, an arc-shaped connecting pipe 15 installed on the outer arc surface of the permanent magnet motor body 1, an annular cover shell 16 installed on the outer side of the permanent magnet motor body 1 and a centrifugal liquid pump 17 installed inside the annular cover shell 16.

[0034] The centrifugal liquid pump 17 is a prior art, which circulates the coolant inside the lateral heat dissipation copper tube 14 and the arc-shaped connecting tube 15 by rotating, drives the coolant inside the annular cover 16 downward, flows into the internal installation chamber 7, and then flows back from the internal installation chamber 7 to the inside of the lateral heat dissipation copper tube 14. The lateral heat dissipation copper tube 14 forms two symmetrical serpentine structure cooling flow channels on the outside of the permanent magnet motor body 1 through the arc-shaped connecting tubes 15 that are staggered at both ends of the lateral heat dissipation blades 13, and are arranged from top to bottom, and finally connected to the inner side of the annular cover 16.

[0035] In order to facilitate damping adjustment at multiple positions, the multi-directional damping mechanism includes a multi-directional damping spring 18 installed on the upper arc surface of the arc assembly bracket 11 and a transverse damping spring 19 installed on the lateral plane of the arc assembly bracket 11 .

[0036] In order to cooperate with the multi-directional shock absorbing adjustment positioning, an inner positioning groove that cooperates with the multi-directional shock absorbing spring 18 and the transverse shock absorbing spring 19 is opened on the inner side of the arc-shaped bottom assembly groove 12. The inner positioning groove of the arc-shaped bottom assembly groove 12 corresponding to the transverse shock absorbing spring 19 is connected to the inside of the lateral heat dissipation copper tube 14.

[0037] In order to facilitate flow diversion and improve safety at the same time, a built-in flexible flow diversion tube 21 for connecting the lateral heat dissipation copper tube 14 and the internal installation chamber 7 is arranged inside the transverse shock-absorbing spring 19 .

[0038] In order to facilitate the lateral communication, a lateral liquid guide channel 22 for connecting the arc-shaped connecting pipe 15 and the internal installation chamber 7 is opened on the inner side of the annular cover shell 16.

[0039] In order to cooperate with the monitoring of temperature and vibration, a temperature sensor controller 23 and a vibration sensor controller 24 are fixedly installed on the inner side surface of the internal installation chamber 7.

[0040] The temperature sensor controller 23 and the vibration sensor controller 24 are both prior art. The operating state of the permanent magnet motor body 1 is determined by the change in the internal temperature of the coolant, and then the vibration is sensed by the vibration sensor controller 24, so that the working condition of the permanent magnet motor body 1 can be recorded and understood. When the temperature changes and exceeds the set upper and lower limits, the temperature is adjusted by controlling the speed of the centrifugal liquid pump 17. The control method is prior art.

[0041] When the vibration changes, it is adjusted by changing the elastic stroke of the multi-directional shock-absorbing spring 18. When the vibration is too large, the frequency is reduced or the motor is turned off to ensure safety.

[0042] In order to cooperate with the magnetic control adjustment, an electromagnet 25 cooperating with the multi-directional damping spring 18 is fixedly mounted inside the inner positioning groove 20 on the inner arc-shaped side surface of the arc-shaped bottom mounting groove 12 .

[0043] The electromagnet 25 is a prior art, which controls the contraction of the multi-directional shock-absorbing spring 18 by powering on. The multi-directional shock-absorbing spring 18 at multiple points on both sides contracts, thereby tightening the multi-directional shock-absorbing spring 18, thereby improving the structural stability and firmness of the upper permanent magnet motor body 1.

[0044] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A compact permanent magnet motor with an electric control frequency conversion integrated cooling structure, comprising a permanent magnet motor body (1), a drive circuit board (2) for controlling the permanent magnet motor body (1), a control circuit board (3) and a power supply circuit board (4), wherein: The lower surface of the permanent magnet motor body (1) is provided with a bottom-mounted shock-absorbing seat for mounting a drive circuit board (2), a control circuit board (3) and a power supply circuit board (4), and a lateral active cooling mechanism is fixedly mounted on the outer side of the permanent magnet motor body (1); The bottom-mounted shock-absorbing seat comprises a bottom mounting seat (5), a lateral bolt fixing frame (6) fixed on the outer side of the bottom mounting seat (5), an internal mounting chamber (7) opened in the bottom mounting seat (5), a copper heat-conducting plate (8) fixed by bolts on the top surface of the internal mounting chamber (7), an internal assembly box (9) fixed on the lower surface of the copper heat-conducting plate (8), a bottom closing sealing plate (10) fixed at the lower opening position of the internal mounting chamber (7), an arc-shaped assembly bracket (11) fixed on both sides of the upper surface of the bottom mounting seat (5), and a multi-directional shock-absorbing mechanism installed inside the arc-shaped assembly bracket (11); The lateral active cooling mechanism comprises lateral heat dissipation blades (13) fixed to the outside of the permanent magnet motor body (1), an integral lateral heat dissipation copper tube (14) fixed to the outer side of the lateral heat dissipation blades (13), an arc-shaped connecting tube (15) mounted on the outer arc-shaped surface of the permanent magnet motor body (1), an annular cover (16) mounted on the outer side of the permanent magnet motor body (1), and a centrifugal liquid pump (17) mounted inside the annular cover (16); The lower surface of the permanent magnet motor body (1) is provided with an arc-shaped bottom assembly groove (12) that matches the arc-shaped assembly bracket (11); The multi-directional shock absorbing mechanism comprises a multi-directional shock absorbing spring (18) mounted on the upper arc surface of the arc-shaped assembly bracket (11) and a transverse shock absorbing spring (19) mounted on the lateral plane of the arc-shaped assembly bracket (11); An inner side surface of the arc-shaped bottom assembly groove (12) is provided with an inner side positioning groove that matches the multi-directional shock absorbing spring (18) and the transverse shock absorbing spring (19); the inner side positioning groove of the arc-shaped bottom assembly groove (12) corresponding to the transverse shock absorbing spring (19) is connected to the inside of the lateral heat dissipation copper tube (14).

2. According to claim 1, a compact permanent magnet motor with electric control frequency conversion integrated cooling structure is characterized in that: The transverse damping spring (19) is provided with a built-in flexible flow guide pipe (21) for connecting the lateral heat dissipation copper pipe (14) and the internal installation chamber (7).

3. The compact permanent magnet motor with electric control frequency conversion integrated cooling structure according to claim 1 is characterized in that: A lateral liquid guide channel (22) for connecting the arc-shaped connecting pipe (15) and the internal installation chamber (7) is provided on the inner side surface of the annular cover shell (16).

4. The compact permanent magnet motor with electric control frequency conversion integrated cooling structure according to claim 1 is characterized in that: A temperature sensor controller (23) and a vibration sensor controller (24) are fixedly mounted on the inner side surface of the internal mounting chamber (7).

5. The compact permanent magnet motor with electric control frequency conversion integrated cooling structure according to claim 1 is characterized in that: An electromagnet (25) matching with the multi-directional damping spring (18) is fixedly mounted inside the inner positioning groove (20) on the inner arcuate side surface of the arcuate bottom assembly groove (12).

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