Heat dissipation device of permanent magnet motor

Abstract

A heat dissipation device of a permanent magnet motor comprises heat dissipation ribs on a machine base, and the heat dissipation ribs are evenly distributed in the circumferential direction of the outer side of the machine base. The heat dissipation device further comprises a heat dissipation component which is arranged on the machine base in a sleeving mode, and the inner side of the heat dissipation component abuts against the machine base. The heat dissipation component is sleeved on the base, so that the heat dissipation ribs on the base and the heat dissipation component dissipate heat generated by the motor together. The plurality of radiating fins are arranged on the inner side of the radiating component and are tightly attached to the outer surface of the base, so that the surface area of the radiating component can be greatly increased, and the radiating effect is improved. Through mounting holes are formed in the corresponding positions of the shell sleeve of the heat dissipation component and the motor base of the stator, and bolts penetrate through the mounting holes to fixedly connect the shell sleeve and the motor base, so that the heat dissipation component can be stably connected to the motor base.

Description

Technical Field

[0001] The utility model relates to a heat dissipation device, in particular to a heat dissipation device for a permanent magnet motor. Background Art

[0002] Permanent magnet synchronous motors offer numerous advantages over brushless motors, including improved torque-speed characteristics, high-speed dynamic response, high efficiency, long life, low noise, and high speed. These advantages have led to their widespread use in devices and instrumentation for everyday appliances, the automotive industry, aviation, consumer electronics, medical electronics, and industrial automation. However, their control systems are more complex than those of conventional asynchronous motors, requiring numerous control methods. To achieve optimal control performance, inverter control devices such as frequency converters and control circuit boards are required to drive and control the motors. These control devices generate significant heat during operation, necessitating heat dissipation. At present, the heat dissipation of the permanent magnet synchronous motor control system is to install the control system components in a control device box, and dissipate the heat of these heat-generating components through a special cooling device. Most of the time, a fan is installed in the control system box to dissipate heat through the fan. However, this makes the control system appear very large, so the current permanent magnet synchronous motors will place the control system inverter in an independent control system box separated from the motor, which is not conducive to the control of the motor, and it is impossible to achieve the improvement of the integration of the permanent magnet synchronous motor body and the motor control system. Although power control devices such as semiconductors and chips have been continuously developed in recent years, making these heat-generating electronic components more and more miniaturized, if these heat-generating electronic components are still concentrated together and installed in a control device box, a separate cooling device is still required, which will make the control device box appear very large and is still not conducive to direct installation on the motor housing. Otherwise, it may have an adverse effect on the running stability of the motor, so it is necessary to improve this.

[0003] Through search and inquiry, no public technology identical to the technical solution of this utility model was found. Only some related patents were found. The closest technologies are as follows:

[0004] 1. Patent number CN202210659355.6, named "A permanent magnet synchronous motor controller based on multiple heat dissipation" invention patent, the patent discloses a permanent magnet synchronous motor controller based on multiple heat dissipation, including a permanent magnet synchronous motor controller box cover and a circuit board body, the circuit board body is arranged in the permanent magnet synchronous motor controller box cover, the permanent magnet synchronous motor controller box cover is provided with a heat conduction mechanism that cooperates with the circuit board body, the top inner wall of the permanent magnet synchronous motor controller box cover is provided with two exhaust holes, the exhaust holes are provided with a first dust filter, the top inner wall of the permanent magnet synchronous motor controller box cover is fixedly connected with an exhaust cover, the permanent magnet synchronous motor controller box cover is provided with a first worm, the exhaust cover is provided with an exhaust assembly, both ends of the first worm are connected to the inner wall of the permanent magnet synchronous motor controller box cover through a first bearing, the permanent magnet synchronous motor controller box cover Air intake holes are provided on both sides of the inner walls, and both sides of the permanent magnet synchronous motor controller box cover are fixedly connected with a fixing ring, a second dust filter is provided in the fixing ring, the second dust filter is adapted to the air intake hole, the second dust filter and the permanent magnet synchronous motor controller box cover are connected by an elastic mechanism, two baffles are fixedly connected to the inner wall of the fixing ring, a connecting frame is fixedly connected to the second dust filter, a first movable plate is provided on the top of the connecting frame, a push plate is provided on one side of the connecting frame, the push plate and the first movable plate are connected by a lifting mechanism, the first movable plate and the first worm are connected by a transmission mechanism, and a driving mechanism that cooperates with the first worm is provided in the permanent magnet synchronous motor controller box cover; however, this patent only considers the heat dissipation of the circuit board body, and still uses an independent heat dissipation mechanism for heat dissipation, which will increase the volume of the control box cover, which is not conducive to the structural design of the integration of the motor and the control system.

[0005] 2. Patent number CN202210989198.5, entitled "A battery distributed permanent magnet synchronous motor controller cooling system", discloses a battery distributed permanent magnet synchronous motor controller cooling system, including a cooling box, one side of the cooling box is provided with a water tank connected by a return pipe, the other end of the return pipe is fixedly connected to the top of the water tank, a heat dissipation barrel is fixedly connected to the cooling box, a heat dissipation unit is movably connected to the heat dissipation barrel, an air cooling mechanism is provided on the cooling box, a first water cooling element is fixedly connected to the interior of the cooling box, and a first water cooling element is movably connected to the cooling box. A heat dissipation unit is connected, and a second water-cooling component is fixedly connected to the water tank. The cooperation between the air-cooling mechanism and the first water-cooling component accelerates the cooling speed of the circulating cooling medium. At the same time, the heat dissipation unit is intermittently in contact with the heat dissipation barrel. The heat dissipation unit and the heat dissipation barrel can absorb the heat of the heat dissipation barrel when installed. When the heat dissipation unit leaves the heat dissipation barrel, the contact area between the heat dissipation unit and the air increases. The cooperation between the heat dissipation unit and the air-cooling mechanism improves its own heat dissipation efficiency. Although this heat dissipation structure can achieve good heat dissipation effect by using water cooling, the volume structure of the heat dissipation device is very large, and it is completely impossible to realize the integrated structure of the motor body and the control system.

[0006] 3. Patent number CN202211112643.6, entitled "A permanent magnet synchronous motor controller with a cooling structure", discloses a permanent magnet synchronous motor controller with a cooling structure, comprising a motor controller housing and a circuit board body, the circuit board body being arranged in the motor controller housing, the bottom of the circuit board body and the bottom inner wall of the motor controller housing being connected by a plurality of first connecting plates, the bottom of the motor controller housing being fixedly connected to a plurality of mounting brackets, a rotating shell being provided at the top and bottom of the motor controller housing, the rotating shell being a cavity structure with one end open, the rotating shell and the motor controller housing being connected by a rotating member, a plurality of first rotating shafts being provided above and below the circuit board body, and a plurality of first rotating shafts being provided on the first rotating shafts. A plurality of heat dissipation fan blades are fixedly connected, an end of the first rotating shaft away from the circuit board body passes through the inner wall of one side of the motor controller housing, a first bearing is provided at the penetration of the first rotating shaft and the motor controller housing, a plurality of first gears are provided in the rotating shell, one end of the first rotating shaft is fixedly connected to the first gear, a first gear ring is fixedly connected to the inner wall of the rotating shell, the first gear is meshed with the gear teeth on the inner wall of the first gear ring, two second rotating shafts are provided in the motor controller housing, a rotating drive mechanism matching the two second rotating shafts is provided on the motor controller housing, the second rotating shaft and the rotating shell are connected through a transmission mechanism, a plurality of mounting holes are opened on the top inner wall of the motor controller housing, a dustproof net is provided in the mounting hole, and an elastic support mechanism matching the dustproof net is provided in the mounting hole. A baffle is provided on the top of the dustproof net, and the baffle and the motor controller housing are connected by a resetter. Two cleaning brushes are provided on the top of the motor controller housing, and a second connecting plate is provided above the cleaning brush. The second connecting plate is fixedly connected to the rotating shell located on the top of the motor controller housing, and the cleaning brush and the second connecting plate are connected by an elastic pressing unit. The design of the rotation drive mechanism can drive the two second shafts to rotate, and the design of the rotating part makes the rotating shell rotatably connected relative to the motor controller housing. The design of the transmission mechanism can drive the two rotating shells to rotate when the second shaft rotates. When the second shaft rotates, the second shaft drives the rotating shell to rotate. Through the cooperation of the first gear ring and the first gear, when the rotating shell drives the first gear ring to rotate, the first gear ring drives The plurality of first gears are driven to rotate synchronously, thereby causing the plurality of first rotating shafts located above and below the circuit board body to rotate simultaneously, so that the heat dissipation fan blades dissipate heat from the top and bottom of the circuit board body, reducing heat accumulation and improving the stability of the permanent magnet synchronous motor controller. The design of the dustproof net reduces the possibility of external dust entering the motor controller housing through the mounting hole. When the rotating shell rotates, the rotating shell located on the top of the motor controller housing drives the two second connecting plates to rotate, thereby causing the cleaning brush to rotate on the top of the motor controller housing, and the dustproof net is cleaned by the cleaning brush. The design of the elastic pressing unit makes the cleaning brush elastically connected to the second connecting plate, thereby causing the cleaning brush to elastically press the top of the dustproof net.Ensure that the cleaning brush can contact the dust screen. This patent still only solves the heat dissipation of the circuit board body, and there are still problems such as the large and complex cooling system structure. It is still not suitable for the integrated structural design with the motor body.

[0007] In summary, the existing heat dissipation method of the permanent magnet synchronous motor control system still has the problems of complex structure, large size, and failure to consider the inverter heat dissipation and other problems mentioned above. It is impossible to achieve the integrated structure of the motor control system and the motor body, so it is still necessary to further improve it. Utility Model Content

[0008] The technical problem to be solved by the utility model is: how to simplify the heat dissipation of a permanent magnet synchronous motor and ensure the normal operation of the motor.

[0009] In response to the above problems, the technical solution proposed in the present invention is: a heat dissipation device for a permanent magnet motor, including heat dissipation ribs on a machine base, which are evenly distributed in the circumferential direction of the outer side of the machine base; the heat dissipation device also includes a heat dissipation component, which is sleeved on the machine base, and the inner side of the heat dissipation component is against the machine base.

[0010] The heat dissipation component includes a shell and heat dissipation fins. The shell is in the shape of a hollow prism or a circular tube. The heat dissipation fins are evenly arranged on the circumferential direction of the inner wall of the shell.

[0011] The heat dissipation component further includes support ears, which are in the shape of a rectangular parallelepiped. Support ears are provided at both ends of the heat dissipation fin, and the support ears are connected to the inner wall of the shell.

[0012] The stator includes a base and heat dissipation ribs. The heat dissipation component is sleeved on the base. The heat dissipation fins on the inner side of the heat dissipation component and the heat dissipation ribs on the outer side of the base are staggered.

[0013] The height of the heat sink is the same as that of the support ear. The heights of the heat sink and the support ear are both greater than or equal to the height of the heat dissipation rib. The heat sink and the support ear are against the outer surface of the base.

[0014] The heat dissipation ribs include long heat dissipation ribs and short heat dissipation ribs. Two or more long heat dissipation ribs form a group, and two or more short heat dissipation ribs form a group. The long heat dissipation ribs and the heat dissipation ribs are staggered and distributed on the outer surface of the base in groups.

[0015] Through mounting holes are opened at corresponding positions of the shell of the heat dissipation component and the base of the stator, and the mounting holes on the base are opened outside the short heat dissipation ribs. Bolts pass through the mounting holes to fix the shell and the base together.

[0016] The beneficial technical effect of this utility model is that by attaching a heat dissipation component to the motor base, the heat dissipation ribs on the motor base and the heat dissipation component together dissipate heat generated by the motor. Because the heat dissipation component is provided with numerous fins on its inner side, and the fins are in close contact with the outer surface of the motor base, the surface area of ​​the heat dissipation component is significantly increased, thereby enhancing the heat dissipation effect. Through-holes are provided in the housing of the heat dissipation component and at corresponding locations on the stator base. Bolts pass through these holes to securely connect the housing and the motor base, thus firmly attaching the heat dissipation component to the motor base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0018] Figure 2 Schematic diagram of the three-dimensional structure of the machine base;

[0019] Figure 3 is a schematic diagram of the three-dimensional structure of the heat dissipation component;

[0020] In the figure: shell 11, heat sink 12, support ear 13, machine base 21, long heat dissipation rib 221, short heat dissipation rib 222, flange 33. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings: Example 1

[0022] like Figure 1 、 Figure 2 and Figure 3 As shown, the heat dissipation device includes heat dissipation ribs on the base and heat dissipation components. The heat dissipation ribs include long heat dissipation ribs 221 and short heat dissipation ribs 222. The heat dissipation components include a shell 11, heat sinks 12, and support ears 13. The heat dissipation ribs are evenly distributed on the outside of the base 21, and flanges 33 are fixedly connected at both ends of the base 21.

[0023] The shell 11 is in the shape of a hollow prism or a circular tube, and the inner surface of the shell 11 is a cylindrical surface. When the outer surface of the shell 11 is surrounded by a plurality of rectangles, the shell 11 is in the shape of a prism. Figure 1 and Figure 3 The housing 11 shown is prismatic. The outer surface of the housing 11 can also be cylindrical, in which case the housing 11 is tubular. Heat sink fins 12 and support ears 13 are evenly spaced along the inner wall of the housing 11. The block-shaped support ears 13 are located at both ends of the heat sink 12.

[0024] The heat dissipation component's housing 11 fits over the stator's base 21, with the heat dissipation fins 12 on the inside of the housing 11 interlaced with the heat dissipation ribs on the outside of the base 21. In this embodiment, the height of the heat dissipation fins 12 is the same as the height of the support ears 13. Both the height of the heat dissipation fins 12 and the support ears 13 are greater than or equal to the height of the heat dissipation ribs, and the heat dissipation fins 12 and the support ears 13 contact the outer surface of the base 21. Mounting holes are provided through the housing 11 and the stator's base 21 at corresponding locations. Bolts pass through these mounting holes to securely connect the housing 11 and the base 21.

[0025] In order to prevent the support ears 13 from interfering with the heat dissipation ribs when the shell 11 is put on the stator base 21, in this embodiment, the support ears 13 at the front end of the shell 11 are welded to the inner wall of the shell 11. The support ears 13 at the rear end of the shell 11 are hollow and fixed to the base 21 with bolts. After the base 21 and the flange 33 are connected, they are first assembled into the shell 11 from the rear end, and then the support ears 13 are installed. When the bolts are passed through the mounting holes of the shell 11 and the base 21, in order to prevent the bolts from interfering with the heat dissipation ribs, the heat dissipation ribs in this embodiment include long heat dissipation ribs 221 and short heat dissipation ribs 222. Two or more long heat dissipation ribs 221 form a group, and two or more short heat dissipation ribs 222 form a group. The long heat dissipation ribs 221 and the heat dissipation ribs are staggered and distributed on the outer surface of the base 21 in groups. A short heat dissipation rib 222 is provided at the location where the mounting hole is opened on the machine base 21, and the support ear 13 is also provided at the location where the mounting hole is opened in the shell sleeve 11. After the machine base 21 is assembled into the shell sleeve 11, the support ear 13 is located at the short heat dissipation rib 222 and will not interfere with the heat dissipation rib on the machine base 21.

[0026] Obviously, without departing from the principles of the present invention, any improvements or modifications made should be considered within the scope of protection of the present invention.

Claims

1. A heat dissipation device for a permanent magnet motor, comprising heat dissipation ribs on a motor base, wherein the heat dissipation ribs are evenly distributed in a circumferential direction outside the motor base; characterized in that: The heat dissipation device also includes a heat dissipation component, which is sleeved on the machine base, and the inner side of the heat dissipation component is against the machine base.

2. The heat dissipation device for a permanent magnet motor according to claim 1, characterized in that: The heat dissipation component includes a shell and heat dissipation fins. The shell is in the shape of a hollow prism or a circular tube. The heat dissipation fins are evenly arranged on the circumferential direction of the inner wall of the shell.

3. The heat dissipation device of a permanent magnet motor according to claim 2, characterized in that: The heat dissipation component further includes support ears, which are in the shape of a rectangular parallelepiped. Support ears are provided at both ends of the heat dissipation fin, and the support ears are connected to the inner wall of the shell.

4. The heat dissipation device for a permanent magnet motor according to claim 3, characterized in that: The stator includes a base and heat dissipation ribs. The heat dissipation component is sleeved on the base. The heat dissipation fins on the inner side of the heat dissipation component and the heat dissipation ribs on the outer side of the base are staggered.

5. The heat dissipation device for a permanent magnet motor according to claim 4, characterized in that: The height of the heat sink is the same as that of the support ear. The heights of the heat sink and the support ear are both greater than or equal to the height of the heat dissipation rib. The heat sink and the support ear are against the outer surface of the base.

6. The heat dissipation device for a permanent magnet motor according to claim 5, characterized in that: The heat dissipation ribs include long heat dissipation ribs and short heat dissipation ribs. Two or more long heat dissipation ribs form a group, and two or more short heat dissipation ribs form a group. The long heat dissipation ribs and the heat dissipation ribs are staggered and distributed on the outer surface of the base in groups.

7. The heat dissipation device for a permanent magnet motor according to claim 6, characterized in that: Through mounting holes are opened at corresponding positions of the shell of the heat dissipation component and the base of the stator, and the mounting holes on the base are opened outside the short heat dissipation ribs. Bolts pass through the mounting holes to fix the shell and the base together.

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