Permanent magnet synchronous motor controller assembly heat dissipation method based on dispersed heat conduction

Abstract

According to the permanent magnet synchronous motor controller assembly heat dissipation method based on dispersed heat conduction, a motor shell is sleeved with a heat dissipation component matched with the motor shell, component heat dissipation fins are arranged on the inner face of the heat dissipation component, the component heat dissipation fins extend into gaps of the heat dissipation fins of the motor shell, the outer surface of the heat dissipation component is polygonal, and the outer surface of the heat dissipation component is polygonal. The heat dissipation component is provided with a plurality of outer side surfaces, the heating electronic elements are dispersedly installed on the plurality of outer side surfaces of the heat dissipation component, and the heat dissipation component is cooled by cold air of the motor shell and takes away heat of the heating electronic elements installed on the outer side surfaces of the heat dissipation component while the motor shell is air-cooled by a self heat dissipation fan of the shell of the motor stator. According to the invention, the heating electronic elements of the motor control system are dispersedly installed on the heat dissipation component, the heat of the heating electronic elements is taken away while the motor heat dissipation fan dissipates heat of the motor, the heat dissipation structure of the motor control system can be effectively simplified, and the heat dissipation effect is enhanced.

Description

Technical Field

[0001] The invention relates to a heat dissipation method for a permanent magnet synchronous motor controller component, and in particular to a heat dissipation method for a permanent magnet synchronous motor controller component based on dispersed heat conduction. Background Art

[0002] Permanent magnet synchronous motors have many advantages over brushless motors, such as better torque-speed characteristics, high-speed dynamic response, high efficiency, long life, low noise, and high speed. Due to these characteristics, permanent magnet synchronous motors are widely used in daily life appliances, automotive industry, aviation, consumer electronics, medical electronics, industrial automation and other devices and instruments; however, the control system of permanent magnet synchronous motors is more complicated than that of ordinary asynchronous motors, and there are many control methods. In order to make permanent magnet synchronous motors have better control performance, inverter control devices such as frequency converters and control circuit boards are required to drive and control permanent magnet synchronous motors; and these control devices will generate a lot of heat during work, so it is necessary to dissipate heat from these heat-generating control devices. 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 the heat through the fan; but this makes the control system appear very large, so the current permanent magnet synchronous motor 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 the recent development of power control devices such as semiconductors and chips has made 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 casing. 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 the present invention was found, but only some related patents were found. The closest technologies are as follows: 1. The invention patent with the patent number CN202210659355.6 and the name of "A permanent magnet synchronous motor controller based on multiple heat dissipation" 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 matching 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 dustproof 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 inlet holes are opened on the inner walls on both sides, and fixing rings are fixedly connected on both sides of the permanent magnet synchronous motor controller box cover, a second dust-proof filter is arranged in the fixing ring, the second dust-proof filter is matched with the air inlet hole, the second dust-proof 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-proof filter, a first movable plate is arranged on the top of the connecting frame, a push plate is arranged 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 matching the first worm is arranged in the permanent magnet synchronous motor controller box cover; however, this patent only considers the heat dissipation of the circuit board body, and still adopts 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.

[0004] 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 has 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 sink is fixedly connected to the cooling box, a heat sink is movably connected to the heat sink, an air cooling mechanism is arranged on the cooling box, a first water cooling element is fixedly connected to the inside of the cooling box, and a first water cooling element is movably connected to the top of the water tank. A heat dissipation unit is connected, and a second water-cooling component is fixedly connected in 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 heat dissipation efficiency of the heat dissipation unit and the air-cooling mechanism cooperate to improve the heat dissipation efficiency of the heat dissipation unit. Although this heat dissipation structure can obtain a 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.

[0005] 3. Patent number CN202211112643.6, invention patent named "A permanent magnet synchronous motor controller with a cooling structure", which discloses a permanent magnet synchronous motor controller with a cooling structure, including a motor controller housing and a circuit board body, the circuit board body is arranged in the motor controller housing, the bottom of the circuit board body and the bottom inner wall of the motor controller housing are connected by a plurality of first connecting plates, the bottom of the motor controller housing is fixedly connected with a plurality of mounting frames, the top and bottom of the motor controller housing are provided with a rotating shell, the rotating shell is a cavity structure with one end open, the rotating shell and the motor controller housing are connected by a rotating member, the top and bottom of the circuit board body are provided with a plurality of first rotating shafts, and the first rotating shafts are provided with a plurality of The heat dissipation fan blades are fixedly connected to the dryer, and one 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 supporting 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. Through the design of the rotation drive mechanism, the two second rotating shafts can be driven to rotate. Through the design of the rotating part, the rotating shell is rotatably connected relative to the motor controller housing. Through the design of the transmission mechanism, when the second rotating shaft rotates, the two rotating shells can be driven to rotate. When the second rotating shaft rotates, the second rotating 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 respectively 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, thereby 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. While 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.Make sure 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 structure of the cooling system, and it is still not suitable for the integrated structural design with the motor body.

[0006] In summary, the existing heat dissipation method of the permanent magnet synchronous motor control system is still complex in structure and bulky in size, and does not take into account the problems mentioned above such as inverter heat dissipation. It is impossible to achieve an integrated structure of the motor control system and the motor body, so it is still necessary to further improve it. Summary of the invention

[0007] The technical problem to be solved by the present invention is: how to simplify the heat dissipation of the permanent magnet synchronous motor control system so that the permanent magnet synchronous motor control system can be integrated with the motor body; and effectively arrange the control system components with large heat generation so that the heat dissipation effect of the motor control system is better to ensure the normal operation of the motor.

[0008] In view of the above problems, the technical solution proposed in the present invention is: a heat dissipation method for a permanent magnet synchronous motor controller component based on dispersed heat conduction, wherein a heat dissipation component matching the outer shell of the motor stator is mounted on the outer shell of the motor stator, the inner surface of the heat dissipation component is provided with component heat dissipation fins, the component heat dissipation fins extend into the gaps between the outer shell heat dissipation fins of the outer shell of the motor stator, the outer surface of the heat dissipation component is surrounded by more than four outer surfaces, and heat-generating electronic components with large heat generation are dispersedly installed on multiple outer surfaces of the heat dissipation component, and the motor's own heat dissipation fan is used to air-cool the outer shell of the motor stator while also air-cooling the heat dissipation component, and take away the heat of the heat-generating electronic components installed on the outer surfaces of the heat dissipation component, thereby avoiding concentrated heating of the heat-generating electronic components with large heat generation.

[0009] Preferably, the heat dissipation component is an annular hollow structural component that matches the outer shell of the motor stator. The heat dissipation component is sleeved on the outer shell of the motor stator, and the shell of the heat dissipation component is in contact with the outer surface of the shell heat dissipation fins of the outer shell of the motor stator. The heat dissipation fins of the heat dissipation component extend into the gaps between the outer shell heat dissipation fins to form a heat dissipation flow channel. A heat dissipation fan is arranged at the end of the motor. When the heat dissipation fan of the motor dissipates the outer shell and the heat dissipation component of the motor stator, the cold air passing through the heat dissipation flow channel is used to take away the heat of the component heat dissipation fins arranged in the gaps between the outer shell heat dissipation fins, and then the heat of the heat-generating electronic components arranged on multiple outer surfaces of the heat dissipation component is taken away by heat conduction, thereby heat dissipation of the heat-generating electronic components.

[0010] Preferably, the heat-generating electronic components with large heat generation are dispersedly installed on multiple outer surfaces of the shell of the heat dissipation component. The heat-generating electronic components are grouped according to the heat generation, and each group of heat-generating electronic components is installed on an outer surface of the shell of the heat dissipation component, and the heat is dissipated through the component heat dissipation fins and the shell of the heat dissipation component.

[0011] Preferably, the grouping according to the heat of the heat-generating electronic components is based on the heat generation conditions of each heat-generating electronic component and the needs of control system integration, ensuring that the heat generation of each group of heat-generating electronic components is basically the same, and implementing decentralized heat dissipation without affecting the control of the control system.

[0012] Preferably, the outer surface is surrounded by more than four planes or arc surfaces, so that the outer surface of the heat dissipation component forms an annular structure connected end to end.

[0013] Preferably, the component heat dissipation fins are arranged on the inner side of the shell of the heat dissipation component, and the heat-generating electronic components are arranged on the outer side of the shell of the heat dissipation component, and more than three component heat dissipation fins are arranged under each group of heat-generating electronic components to improve the heat dissipation effect of the heat dissipation component on the heat-generating electronic components.

[0014] Preferably, each group of heat-generating electronic components is covered with a box cover, which is installed on the outer side plane of the heat dissipation component where each group of heat-generating electronic components is located, and also assists in heat dissipation through the heat dissipation component.

[0015] Preferably, each box cover includes more than two support plates, and a gap is left between two adjacent support plates of the box covers, so that the box covers outside the shell of the heat dissipation component are connected to each other, thereby improving the heat dissipation effect between the box covers.

[0016] Preferably, the component heat dissipation fins are arranged in the gap between the shell heat dissipation fins of the shell of the motor stator in the same form as the shell heat dissipation fins of the shell of the motor stator, and the component heat dissipation fins only extend into the gap between the shell heat dissipation fins of the shell of the motor stator to a height of 2 / 3, leaving a gap at the bottom, so that a "U"-shaped heat dissipation channel is formed between the heat dissipation component and the shell of the motor stator.

[0017] Preferably, an air guide is provided between the motor's own cooling fan and the heat dissipation component, and the air guide is arranged behind the cooling fan and the heat dissipation component, so that the cold air from the motor's own cooling fan can flow through the heat dissipation flow channel formed by the shell heat dissipation fins of the motor stator shell and the heat dissipation component, thereby simultaneously cooling the shell heat dissipation fins and the component heat dissipation fins.

[0018] The beneficial technical effect of the present invention is as follows: the present invention places heat-generating electronic components with large heat generation on a heat dissipation component sleeved on the outer shell of the motor stator, allows the heat dissipation fins of the heat dissipation component to extend into the heat dissipation flow channel of the outer shell of the motor stator, and then installs a fan at the rear end of the motor to dissipate heat together with the outer shell of the motor stator. The heat-generating electronic components of the permanent magnet motor control system can be dispersedly installed on the outer surface of the heat dissipation component for dispersed heat dissipation. In this way, the heat-generating electronic components with large heat generation can be used for dispersed heat dissipation, and the heat dissipation method can be simplified, which is conducive to the integrated design of the permanent magnet motor and the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the first embodiment; Figure 2 for Figure 1 A schematic diagram of the structure in which the front end cover and the wind shield are hidden; Figure 3 for Figure 2 A schematic diagram of the structure of the housing in which two box covers are hidden; Figure 4 for Figure 2 A schematic diagram of the structure in which all shells are hidden; Figure 5 It is a schematic structural diagram of the outer shell of a single box cover of the first embodiment; Figure 6 It is a schematic diagram of the overall structure of the housing and the heat dissipation component of the first embodiment; Figure 7 It is a schematic diagram of the disassembled structure of the housing and the heat dissipation component of the first embodiment; Figure 8 It is a structural schematic diagram of the front end cover of the first embodiment; Fig. 9 It is a structural schematic diagram of the rear end cover of the first embodiment; Fig.10 It is a schematic structural diagram of the wind shield of the first embodiment; Fig.11 It is a structural schematic diagram of the base of the wind shield of the first embodiment; In the figure: top plate 11, side plate 12, support plate 13, shell 21, heat sink 22, support ear 23, outer shell 31, long heat sink fin 321, short heat sink fin 322, flange 33, rear end cover 4, front cover plate 51, flange rib 52, rear cover plate 53, air guide tube 61, annular plate 611, base 62, support block 63. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: Figure 1 and Figure 2As shown, a heat dissipation device of a permanent magnet motor control system includes a box cover and a heat dissipation component. The heat dissipation component is installed in the circumferential direction of the outer side of the stator housing 31, and a hollow box cover is installed in the circumferential direction of the outer side of the heat dissipation component. The heat dissipation component includes a housing 21 of the heat dissipation component, and the wind shield includes an air guide 61 and a base 62. The rear end of the housing 21 of the heat dissipation component is fixedly connected to the front end of the air guide 61 of the wind shield, and the fan is installed on the base 62 of the wind shield.

[0021] like Figure 3 , 4 As shown in Figures 5 and 6, a hollow box cover is installed in the circumferential direction of the outer side of the heat dissipation component, and the box cover includes a cover plate and a support plate 13, and the cover plate includes a top plate 11 and a side plate 12. Among them, the support plate 13 is fixedly connected to the outer side of the shell 21 of the heat dissipation component. In order not to interfere with other components and to increase the circulation of air in the box cover, each group of support plates 13 in this embodiment is provided with three mutually separated support plates 13 along the length direction of the shell 21 of the heat dissipation component. In this embodiment, the shell 21 of the heat dissipation component is a hollow prism, and the outer surface of the shell 21 of the heat dissipation component is surrounded by a plurality of rectangular planes of the same size, and the inner side surface of the shell 21 of the heat dissipation component is a cylindrical surface. The number of planes on the outer surface of the shell 21 of the heat dissipation component is the same as the number of groups of support plates 13, and multiple groups of support plates 13 are evenly distributed in the circumferential direction of the outer side of the shell 21 of the heat dissipation component.

[0022] In this embodiment, various heat-generating electronic components with high heat generation are dispersedly placed in each hollow box cover, and various heat-generating electronic components with high heat generation are installed on the outside of the shell 21 of the heat dissipation component, so that the various heat-generating electronic components with high heat generation are distributed as evenly as possible on the outside of the shell 21 of the heat dissipation component to avoid heat concentration.

[0023] A side plate 12 is disposed around each of the top plate 11 of the cover plate, and the four side plates 12 are disposed perpendicularly to the top plate 11. In this embodiment, the height of the side plates 12 at both ends of the length direction of the cover plate is greater than the height of the side plates 12 at both ends of the width direction of the cover plate. A gap is provided between the side plates 12 distributed in the length direction and the side plates 12 distributed in the width direction, so that when the cover plate is installed on the support plate 13, the side plates 12 will not interfere with the support plate 13.

[0024] The cover plate of the box cover is installed on the support plate 13, and the outer sides of two adjacent cover plates are pressed against each other, so that the inner side of the cover plate of each box cover is also pressed against the outer side of the support plate 13. The friction between the cover plates is increased, thereby increasing the stability of the cover plate installed on the support plate 13, so that the cover plate is not easy to fall off from the support plate 13.

[0025] like Figure 1 , Figures 6 to 9As shown, the stator of the permanent magnet synchronous motor includes a housing 31, heat dissipation fins and a flange 33, and the heat dissipation fins are evenly distributed on the outer side of the housing 31. The two ends of the housing 31 are fixedly connected with flanges 33, and the front cover, the rear cover 4 and the flange 33 of the housing 31 are all provided with corresponding through mounting holes, and bolts pass through the mounting holes to fix the front cover and the rear cover 4 to the flanges 33 at the two ends of the housing 31.

[0026] The heat dissipation component includes a housing 21 of the heat dissipation component, heat sinks 22 and support ears 23. The housing 21 of the heat dissipation component is a hollow prism, and the heat sinks 22 and support ears 23 are evenly arranged on the circumferential direction of the inner wall of the housing 21 of the heat dissipation component. The block-shaped support ears 23 are arranged at both ends of the heat sink 22. A hollow box cover is installed in the circumferential direction of the outer side of the heat dissipation component, and the heat-generating electronic components that need to dissipate heat are placed in the hollow box cover.

[0027] The heat dissipation component housing 21 of the heat dissipation component is sleeved on the stator housing 31, so that the heat dissipation fins 22 on the inner side of the heat dissipation component housing 21 and the heat dissipation fins on the outer side of the housing 31 are staggered, and the heat dissipation fins 22 and the support ears 23 on the heat dissipation component housing 21 are against the outer side of the housing 31. The stator includes the housing 31 and the heat dissipation fins, and the heat dissipation component housing 21 of the heat dissipation component and the stator housing 31 are provided with through mounting holes at corresponding positions, and bolts pass through the mounting holes to fix the heat dissipation component housing 21 and the housing 31 together.

[0028] In order to prevent the support ear 23 from interfering with the heat dissipation fin when the housing 21 of the heat dissipation component is sleeved on the housing 31 of the stator, in this embodiment, the support ear 23 at the rear end of the housing 21 of the heat dissipation component is hollow and fixedly connected to the housing 31 by bolts. After the housing 31 and the flange 33 are connected, they are first assembled into the housing 21 of the heat dissipation component from the rear end, and then the support ear 23 is installed. When the bolts are passed through the mounting holes of the housing 21 of the heat dissipation component and the housing 31, in order to prevent the bolts from interfering with the heat dissipation fins, the housing heat dissipation fins in this embodiment include long heat dissipation fins 321 and short heat dissipation fins 322, and the short heat dissipation fins 322 are arranged at the position where the mounting hole is opened on the housing 31. And the support ear 23 is also arranged at the position where the mounting hole is opened on the housing 21 of the heat dissipation component. After the housing 31 is assembled into the housing 21 of the heat dissipation component, the support ear 23 is located at the short heat dissipation fin 322, and will not interfere with the heat dissipation fins on the housing 31.

[0029] like Fig.10 and Fig.11As shown, the hood includes an air guide tube 61, an annular plate 611, a support block 63 and a base 62. The air guide tube 61 is in the shape of a circular tube. The front end of the air guide tube 61 is fixedly connected to the rear end of the housing 21 of the heat dissipation component. The rear end of the air guide tube 61 is integrally formed with an annular plate 611. The base 62 is a circular tube with a sealed rear end. The two ends of the support block 63 are respectively fixedly connected to the annular plate 611 and the base 62. A gap is left between the base 62 and the annular plate 611. A fan (the fan is not shown in the figure) is installed on the base 62 of the hood. The cavity of the air guide tube 61 is connected with the through hole of the rear end cover 4 and the gap between the heat sink 22 and the heat dissipation fins in sequence to form an air duct. When the fan is turned on, air is blown out from the air duct, thereby taking away the heat on the stator and the heat dissipation component.

[0030] This embodiment adopts three heat dissipation methods to dissipate heat from the permanent magnet synchronous motor with high heat generation step by step. The first is: various heat-generating electronic components with high heat generation are installed on the outside of the heat dissipation component housing 21 of the heat dissipation component made of metal, so that various heat-generating electronic components with high heat generation are distributed as evenly as possible on the outside of the heat dissipation component housing 21 to avoid heat concentration. The second is: a metal heat sink 22 is arranged on the inside of the heat dissipation component housing 21, a metal box cover is arranged on the outside of the heat dissipation component housing 21, and the support plate 13 is arranged separately so that each box cover is connected, further expanding the surface area of ​​the metal heat dissipation component and improving the heat dissipation effect. The third is: after turning on the fan, air is sucked in from the gap between the base 62 and the annular plate 611, and blown out from the cavity of the air guide 61, the through hole of the rear end cover 4, the gap between the heat sink 22 and the heat dissipation fins, and the through hole of the front end cover in turn, thereby taking away the heat on the stator and the heat dissipation component, further improving the heat dissipation effect.

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that: no heat sink 22 is provided on the inner wall of the shell 21 of the heat dissipation component, the shell 21 of the heat dissipation component is put on the outer shell 31, so that the heat dissipation fins on the outer shell 31 are in contact with the inner wall of the shell 21 of the heat dissipation component, thereby conducting the heat on the outer shell 31 to the heat dissipation component.

[0032] Through the above structural description, it can be seen that the present invention essentially relates to a method for dissipating heat of a permanent magnet synchronous motor controller component based on dispersed heat conduction, wherein a heat dissipation component matching the outer shell 31 of the motor stator is mounted on the outer shell 31 of the motor stator, and component heat dissipation fins are arranged on the inner surface of the heat dissipation component, and the component heat dissipation fins extend into the gaps between the heat dissipation fins of the outer shell 31 of the motor stator. The outer surface of the heat dissipation component is surrounded by more than four outer surfaces, and heat-generating electronic components with large heat generation are dispersedly installed on multiple outer surfaces of the heat dissipation component. The motor's own heat dissipation fan is used to cool the outer shell 31 of the motor stator while using the cold air from the outer shell 31 of the motor stator to dissipate the heat of the heat dissipation component, and take away the heat of the heat-generating electronic components installed on the outer surfaces of the heat dissipation component, thereby avoiding concentrated heating of the heat-generating electronic components with large heat generation.

[0033] Preferably, the heat dissipation component is an annular hollow structural member that matches the outer shell 31 of the motor stator. The heat dissipation component is sleeved on the outer shell 31 of the motor stator, and the shell 21 of the heat dissipation component is in contact with the outer surface of the heat dissipation fins of the outer shell 31 of the motor stator. The heat dissipation fins of the heat dissipation component extend into the gaps between the heat dissipation fins of the outer shell 31 to form a heat dissipation flow channel. A heat dissipation fan is arranged at the end of the motor. When the heat dissipation fan of the motor dissipates the outer shell and the heat dissipation component of the motor stator, the heat dissipation cooling wind passing through the heat dissipation flow channel is used to take away the heat of the heat dissipation fins of the component arranged in the gaps between the heat dissipation fins of the outer shell 31, and then the heat of the heat-generating electronic components arranged on multiple outer surfaces of the heat dissipation component is taken away by heat conduction, thereby heat dissipation of the heat-generating electronic components.

[0034] Preferably, the heat-generating electronic components with large heat generation are dispersedly installed on multiple outer surfaces of the shell 21 of the heat dissipation component by grouping them according to the heat of the heat-generating electronic components, and each group of heat-generating electronic components is installed on one of the multiple outer surfaces of the shell 21 of a heat dissipation component, and the heat is dissipated through the component heat dissipation fins and the shell of the heat dissipation component.

[0035] Preferably, the grouping according to the heat of the heat-generating electronic components is based on the heat generation conditions of each heat-generating electronic component and the needs of control system integration, ensuring that the heat generation of each group of heat-generating electronic components is basically the same, and implementing decentralized heat dissipation without affecting the control of the control system.

[0036] Preferably, the outer surface is surrounded by more than four planes or arc surfaces, so that the outer surface of the heat dissipation component forms an annular structure connected end to end.

[0037] Preferably, the component heat dissipation fins are arranged on the inner side of the shell of the heat dissipation component, and the heat-generating electronic components are arranged on the outer side of the shell of the heat dissipation component, and more than three component heat dissipation fins are arranged under each group of heat-generating electronic components to improve the heat dissipation effect of the heat dissipation component on the heat-generating electronic components.

[0038] Preferably, each group of heat-generating electronic components is covered with a box cover, which is installed on the outer side plane of the heat dissipation component where each group of heat-generating electronic components is located, and also assists in heat dissipation through the heat dissipation component.

[0039] Preferably, each box cover includes more than two support plates 13, and a gap is left between two adjacent support plates 13 of the box covers, so that the box covers outside the shell 21 of the heat dissipation component are connected to each other, thereby improving the heat dissipation effect between the box covers.

[0040] Preferably, the component cooling fins are arranged in the gap between the cooling fins of the outer shell 31 of the motor stator in the same manner as the cooling fins of the outer shell 31 of the motor stator, and the component cooling fins only extend to 2 / 3 of the height of the gap between the cooling fins of the outer shell 31 of the motor stator, leaving a gap at the bottom, so that a "U"-shaped cooling channel is formed between the cooling component and the outer shell 31 of the motor stator.

[0041] Preferably, an air guide is provided between the motor's own cooling fan and the heat dissipation component, and the air guide is arranged behind the cooling fan and the heat dissipation component, so that the cold air of the motor's own cooling fan can flow through the heat dissipation flow channel formed by the heat dissipation fins of the outer shell 31 of the motor stator and the heat dissipation component, thereby cooling the heat dissipation fins of the outer shell 31 and the heat dissipation fins of the component at the same time.

[0042] The beneficial technical effect of the present invention is as follows: the present invention places the heat-generating electronic components with large heat generation on a heat dissipation component which is sleeved on the outer shell 31 of the motor stator, allows the heat dissipation fins of the heat dissipation component to extend into the heat dissipation flow channel of the outer shell 31 of the motor stator, and then installs a fan at the rear end of the motor to dissipate heat together with the outer shell 31 of the motor stator. The heat-generating electronic components of the permanent magnet motor control system can be dispersedly installed on the outer surface of the heat dissipation component for dispersed heat dissipation. In this way, the heat-generating electronic components with large heat generation can be used for dispersed heat dissipation, and the heat dissipation method can be simplified, which is conducive to the integrated design of the permanent magnet motor and the control system.

[0043] Obviously, without departing from the principles of the present invention, several improvements or modifications made should be considered as within the protection scope of the present invention.

Claims

1. Heat dissipation method of permanent magnet synchronous motor controller components based on dispersed heat conduction, It is characterized in that A heat dissipation component matching the outer shell of the motor stator is mounted on the outer shell of the motor stator, the inner surface of the heat dissipation component is provided with component heat dissipation fins, the component heat dissipation fins extend into the gaps between the outer shell heat dissipation fins of the outer shell of the motor stator, the outer surface of the heat dissipation component is surrounded by more than four outer surfaces, and the heat-generating electronic components with large heat generation are dispersedly installed on the outer surface of the heat dissipation component, and the heat dissipation fan of the motor itself is used to air-cool the outer shell of the motor stator while also cooling the heat dissipation component, and taking away the heat of the heat-generating electronic components installed on the outer surface of the heat dissipation component, so as to avoid concentrated heating of the heat-generating electronic components with large heat generation; the heat dissipation component is an annular hollow structural member matching the outer shell of the motor stator, a shell is arranged on the outer side of the heat dissipation component, the heat dissipation component is sleeved on the outer shell of the motor stator, and the shell of the heat dissipation component is aligned with the motor stator. The outer surface of the shell heat dissipation fin of the shell is in contact with the outer surface of the shell heat dissipation fin of the shell, and the component heat dissipation fins of the heat dissipation component extend into the gap between the shell heat dissipation fins to form a heat dissipation flow channel; a heat dissipation fan is arranged at the end of the motor, and when the heat dissipation fan of the motor dissipates the shell and the heat dissipation component of the motor stator, the cold wind passing through the heat dissipation flow channel is used to take away the heat of the component heat dissipation fins arranged in the gap between the shell heat dissipation fins, and then the heat of the heat-generating electronic components arranged on multiple outer surfaces of the heat dissipation component is taken away by heat conduction, so as to form heat dissipation for the heat-generating electronic components; the heat-generating electronic components with large heat generation are dispersedly installed on multiple outer surfaces of the shell of the heat dissipation component, and the heat-generating electronic components of each group are installed on one outer surface of the shell of the heat dissipation component, and the heat is dissipated through the component heat dissipation fins and the shell of the heat dissipation component.

2. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 1, It is characterized in that The grouping according to the heat of the heat-generating electronic components is performed according to the heat generation conditions of the heat-generating electronic components and the need for control system integration, and dispersed heat dissipation is implemented without affecting the control of the control system.

3. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 1 or 2, It is characterized in that The outer surface is surrounded by more than four planes or arc surfaces, so that the outer surface of the heat dissipation component forms a ring structure connected end to end.

4. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 1 or 2, It is characterized in that The component heat dissipation fins are arranged on the inner side of the shell of the heat dissipation component, and the heat-generating electronic components are arranged on the outer side of the shell of the heat dissipation component. More than three component heat dissipation fins are arranged under each group of heat-generating electronic components to improve the heat dissipation effect of the heat dissipation component on the heat-generating electronic components.

5. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 1 or 2, It is characterized in that A box cover is provided outside each group of heat-generating electronic components. The box cover is installed on the outer surface of the heat-dissipating component where each group of heat-generating electronic components is located, and also assists in heat dissipation through the heat-dissipating component.

6. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 5, It is characterized in that Each box cover includes more than two support plates, and a gap is left between two adjacent support plates of the box covers, so that the box covers outside the shell of the heat dissipation component are connected to each other, thereby improving the heat dissipation effect between the box covers.

7. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 1, It is characterized in that The component heat dissipation fins are arranged in the gap between the shell heat dissipation fins of the motor stator shell in the same form as the shell heat dissipation fins of the motor stator shell, and the component heat dissipation fins only extend into the gap between the shell heat dissipation fins of the motor stator shell to a height of 2 / 3, leaving a gap at the bottom, so that a "U"-shaped heat dissipation flow channel is formed between the heat dissipation component and the motor stator shell.

8. The method for dissipating heat from a permanent magnet synchronous motor controller assembly based on dispersed heat conduction according to claim 1, It is characterized in that An air guide is arranged between the motor's own cooling fan and the heat dissipation component. The air guide is arranged behind the cooling fan and the heat dissipation component, so that the cold air of the motor's own cooling fan can flow through the heat dissipation flow channel formed by the shell heat dissipation fins of the motor stator shell and the heat dissipation component, and the shell heat dissipation fins and the component heat dissipation fins are cooled by air at the same time.

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