CN219042165U

CN219042165U - Motor controller

Info

Publication number: CN219042165U
Application number: CN202222802643.0U
Authority: CN
Inventors: 胡文俊; 任邹弘; 许燕; 孙志华; 刘建宇
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-05-16
Anticipated expiration: 2032-10-24

Abstract

The utility model discloses a motor controller, which can realize the volume control of the motor controller and effectively improve the volume utilization rate of the motor controller while improving the heat dissipation performance. The motor controller comprises a shell assembly, a connector and a circuit board assembly arranged in the shell assembly, wherein the circuit board assembly comprises a circuit substrate, a control chip and a capacitor which are electrically connected. The circuit board assembly is connected to the shell assembly, and a panel, close to the circuit board assembly, of the shell assembly is provided with a heat dissipation structure for cooling the control chip, a plug-in position for the connector to be electrically connected with the circuit board assembly and a containing part for containing the capacitor; the connector and the accommodating part are both protruded out of the outer surface of the shell assembly, and a limiting structure for limiting the capacitor is arranged in the accommodating part. The control chip is protruded from the accommodating part of the shell assembly, so that the distance between the control chip and the heat dissipation structure on the shell assembly is shortened, the heat conduction path is shortened, and the heat dissipation performance is improved.

Description

Motor controller

Technical Field

The utility model relates to the technical field of motor controllers, in particular to a motor controller.

Background

The prior art relates to an automotive motor controller, wherein a circuit board assembly comprises a circuit substrate, a control chip and a capacitor which are electrically connected. Because the height of the capacitor is obviously higher than that of the circuit substrate and the control chip, after the circuit board assembly is installed, the height of the capacitor is obviously higher, so that when the capacitor is installed, the heat dissipation function of the control chip is ensured, meanwhile, the enough installation space of the capacitor is ensured, and under the conditions that other installation setting distances and parameters are determined, the distance between the control chip and the shell assembly is increased to a certain extent, and the heat dissipation design difficulty is increased.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the motor controller, which can improve the heat dissipation performance, realize the control of the volume of the motor controller and effectively improve the volume utilization rate of the motor controller.

The technical scheme for achieving the technical purpose of the utility model is that the motor controller comprises a shell assembly, a connector and a circuit board assembly arranged in the shell assembly, wherein the circuit board assembly comprises a circuit substrate, a control chip and a capacitor which are electrically connected. The circuit board assembly is connected to the shell assembly, and a panel, close to the circuit board assembly, on the shell assembly is provided with a heat dissipation structure for cooling the control chip, a plug-in position for the connector to be electrically connected with the circuit board assembly and a containing part for containing the capacitor; the connector and the accommodating part are both protruded out of the outer surface of the shell assembly, and a limiting structure for limiting the capacitor is arranged in the accommodating part.

In some embodiments, the motor controller further comprises a thermal pad disposed between the control chip and the heat dissipation structure, and the thermal pad is in contact with the control chip.

In some embodiments, the outer surface of the panel is provided with a sink groove, and the heat dissipation structure is arranged in the sink groove and is in contact with the bottom of the sink groove; the heat conducting pad is arranged between the control chip and the tank bottom and is contacted with the control chip and the tank bottom.

In some embodiments, the heat dissipation structure is a plurality of heat dissipation pins arranged at intervals; the protruding height of the connector is not smaller than the accommodating portion.

In some embodiments, the inner surface of the receiving portion is provided with a thermally conductive curing glue; the inner profile of the accommodating part is matched with the shape of the capacitor.

In some embodiments, the circuit board assembly includes a control board and a drive board; the control board and the driving board are arranged in the shell assembly at intervals; the heat dissipation structure, the connector and the containing part are arranged on a panel, close to the control panel, of the shell assembly.

In some embodiments, the housing assembly includes first and second housings connected, the first and second housings circumscribing a mounting cavity in which a circuit board assembly is mounted; the first shell is connected with the control board; the second shell is connected with the driving plate.

In some embodiments, the inner surface of the first housing is provided with a connecting post, a threaded blind hole is formed in the connecting post, and the control board is connected to the threaded blind hole of the connecting post through a connecting piece.

In some embodiments, the outer surface of the first housing is further provided with a high voltage junction box having three connectors for electrical connection with a power supply device, DCDC and an air conditioning compressor, respectively.

In some embodiments, the housing assembly further comprises a water cooled plate, the water cooled plate being of unitary construction with the second housing; the motor controller also comprises an IGBT which is arranged on the water cooling plate and positioned in the mounting cavity; the driving plate is arranged on the water cooling plate or the IGBT.

According to the technical scheme, the motor controller provided by the utility model comprises a shell assembly, a connector and a circuit board assembly arranged in the shell assembly. The circuit board assembly is connected to the shell assembly, and a panel, close to the circuit board assembly, on the shell assembly is provided with a heat dissipation structure for cooling the control chip, a plug-in position for the connector to be electrically connected with the circuit board assembly and a containing part for containing the capacitor; the connector and the accommodating part are both protruded out of the outer surface of the shell assembly, and a limiting structure for limiting the capacitor is arranged in the accommodating part. The connector realizes signal transmission of the motor controller, and a containing part capable of containing the capacitor is arranged on the outer surface of the shell assembly in a protruding mode, and a limiting structure used for limiting the capacitor is arranged in the containing part, so that on one hand, the capacitor can be limited to a certain extent, the limiting structure realizes heat conduction between the capacitor and the containing part, heat of the capacitor is transmitted to the shell assembly, and the containing part plays roles of heat dissipation and fixation, and therefore failure of the capacitor during vibration is avoided; on the other hand, the distance between the control chip and the heat dissipation structure on the shell assembly is shortened through the accommodating part protruding outwards from the shell assembly, so that the heat conduction path is shortened, and the improvement of heat dissipation performance is facilitated. The control chip and the heat dissipation structure are in indirect contact heat transfer, and even can be in direct contact to transfer heat, so that the heat dissipation structure can spread the heat of the control chip finally, and the effect of cooling is achieved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a motor controller provided by the utility model;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an exploded schematic view of the motor controller of FIG. 1;

FIG. 5 is an isometric view of a first housing of the motor controller of FIG. 4;

FIG. 6 is a top view of the first housing of FIG. 5;

FIG. 7 is a B-B cross-sectional view of the first housing of FIG. 6;

fig. 8 is a bottom view of the first housing of fig. 5.

Reference numerals illustrate: 100-motor controller, 110-shell assembly, 111-first shell, 112-second shell, 113-heat radiation structure, 114-plug position, 115-accommodation part, 116-connecting post, 117-threaded blind hole, 118-winding displacement operating window, 120-circuit board assembly, 121-control board, 122-drive board, 123-base plate, 124-control chip, 125-capacitor, 126-connection winding displacement, 130-connector, 140-heat conduction pad, 150-high voltage switching box, 160-water cooling plate, 170-IGBT, 180-cover plate.

Detailed Description

In order to make the technical solution more clearly understood by those skilled in the art, the following detailed description is made with reference to the accompanying drawings.

In order to solve the technical problems of waste of installation space, low utilization rate and poor heat dissipation performance of a motor controller in the prior art, the utility model provides the motor controller, which improves the heat dissipation performance, realizes the control of the volume of the motor controller and effectively improves the volume utilization rate of the motor controller. The technical content of the present utility model will be described in detail below by way of 1 specific example:

examples

In the related art, the circuit board assembly 120 includes the circuit substrate 123, the control chip 124 and the capacitor 125 that are electrically connected, since the height of the capacitor 125 is significantly higher than that of the circuit substrate 123 and the control chip 124, the height of the capacitor 125 is significantly higher after the circuit board assembly 120 is installed, so that when the circuit board assembly is installed, a sufficient installation space of the capacitor 125 needs to be ensured while ensuring the heat dissipation function of the control chip 124, and under the conditions of other installation setting distances and parameter determination, the distance between the control chip 124 and the housing assembly 110 is increased to a certain extent, thereby increasing the design difficulty of heat dissipation.

In comparison to the prior art, an embodiment of the present utility model provides a motor controller 100, as shown in fig. 1-8, including a housing assembly 110, a connector 130, and a circuit board assembly 120 disposed inside the housing assembly 110, as shown in fig. 1-8. The circuit board assembly 120 is connected to the housing assembly 110, and a panel of the housing assembly 110, which is close to the circuit board assembly 120, is provided with a heat dissipation structure 113 for cooling the control chip 124, a socket 114 for electrically connecting the connector 130 to the circuit board assembly 120, and a receiving portion 115 for receiving the capacitor 125; the connector and the accommodating portion 115 are both protruded out of the outer surface of the housing assembly 110, and a limiting structure for limiting the capacitor 125 is arranged in the accommodating portion 115. The connector 130 realizes signal transmission of the motor controller 100, and a containing part 115 capable of containing the capacitor 125 is arranged on the outer surface of the shell assembly 110 in a protruding manner, and a limiting structure for limiting the capacitor 125 is arranged in the containing part 115, so that on one hand, the capacitor 125 can be limited to a certain extent, the limiting structure realizes heat conduction between the capacitor 125 and the containing part 115, so that heat of the capacitor 125 is transmitted to the shell assembly 110, the containing part 115 plays roles of heat dissipation and fixation, and the capacitor 125 is prevented from losing efficacy in vibration; on the other hand, the distance between the control chip 124 and the heat dissipation structure 113 on the housing assembly 110 is reduced by the accommodating portion 115, so that the heat conduction path is shortened, and the improvement of heat dissipation performance is facilitated. The control chip 124 and the heat dissipation structure 113 are in indirect contact heat transfer and even can be in direct contact to transfer heat, so that the heat dissipation structure 113 can spread the heat of the control chip 124 out finally, and the effect of cooling is achieved.

In some embodiments, the size of the accommodating portion 115 may be larger than the size of the capacitor 125, at least two positioning columns are disposed in the accommodating portion 115 at intervals, and when the number of the positioning columns is two, the positioning columns are of a bending structure so as to be respectively contacted with two sides of the capacitor 125 at the same time, and the two positioning columns are disposed opposite to each other, so that the purpose of positioning the capacitor 125 can be achieved. In some embodiments, the inner surface of the accommodating portion 115 may also directly form a limiting structure, where at least one of the length and the width of the accommodating portion 115 is matched with the size of the capacitor 125, so as to perform a certain limiting function, and avoid the capacitor 125 from being disabled due to vibration. In some embodiments, the inner profile of the receptacle 115 and the locating posts may also function simultaneously. In this embodiment, the shape of the accommodating portion 115 matches with that of the capacitor 125, and the inner profile of the accommodating portion 115 forms a limiting structure.

As a preferred embodiment, in order to further secure the heat dissipation effect and shock resistance of the capacitor 125, the inner surface of the receiving portion 115 is provided with a heat conductive curing adhesive, and functions to dissipate heat, conduct heat and fix.

To ensure heat dissipation to the control chip 124 and improve heat dissipation performance, in some embodiments, the motor controller 100 may further include a thermal pad 140 disposed between the control chip 124 and the heat dissipation structure 113, and the thermal pad 140 is in contact with a panel of the housing assembly 110 where the control chip 124 and the heat dissipation structure 113 are located.

The utility model does not limit the arrangement mode of the heat dissipation structure 113 specifically, as an implementation mode, the outer surface of the panel is provided with a sink groove, and the heat dissipation structure 113 is arranged in the sink groove and contacts with the bottom of the sink groove; the thermal pad 140 is disposed between the control chip 124 and the bottom of the groove, and contacts both the control chip 124 and the bottom of the groove.

The utility model is not limited to the structure of the housing assembly 110, and in this embodiment, the panel where the sink is located is a bending structure protruding inwards, so as to further reduce the distance between the panel and the control panel, reduce the length of the heat conduction path, and facilitate heat dissipation.

The heat dissipation structure 113 is not particularly limited in this embodiment, and a water cooling structure or an air cooling structure may be used. In this embodiment, the heat dissipation structure 113 is a plurality of heat dissipation pins arranged at intervals, and heat is conducted out through heat exchange with air.

The arrangement of the connector and the accommodating portion 115 is not particularly limited, and can be adaptively adjusted according to the height of the capacitor 125, and in this embodiment, the protruding height of the connector is not smaller than that of the accommodating portion 115, that is, compared with the housing assembly 110 provided with the connector in the prior art, the motor controller 100 provided in this embodiment, the arrangement of the accommodating portion 115 directly uses the height space generated by the connector, so that the protruding height of the structure on the outer surface of the housing assembly 110 is not increased as a whole, and the normal use and installation of other structural members are not affected.

In order to apply the motor controller 100 of the present embodiment to the dual motor controller 100, in the present embodiment, the circuit board assembly 120 includes a control board 121 and a driving board 122, and the control board 121 and the driving board 122 respectively include a circuit substrate 123, a control chip 124, and a capacitor 125, which are electrically connected. The control board 121 and the driving board 122 are arranged in the shell assembly 110 at intervals and are electrically connected through a connecting flat cable 126; the heat dissipation structure 113, the connector 130 and the accommodating portion 115 are all disposed on a panel of the housing assembly 110 near the control board 121, that is, for dissipating heat from the control chip 124 of the control board 121 and dissipating heat from the capacitor 125 of the control board 121.

The structure of the housing assembly 110 is not particularly limited in the present utility model, and reference may be made to the prior art. In order to facilitate the arrangement of the control board 121 and the driving board 122 while ensuring the shock resistance and the installation stability of the control board 121 and the driving board 122, in this embodiment, the housing assembly 110 includes a first housing 111 and a second housing 112 connected, and the first housing 111 and the second housing 112 enclose an installation cavity for installing the circuit board assembly 120; the first housing 111 is connected to the control board 121; the second housing 112 is connected to the driving plate 122. If the driving board 122 and the control board 121 are both mounted on the first housing 111 or the second housing 112, a certain distance is required between the control board 121 and the driving board 122, a support frame with a longer support column is required, so that the effect of the circuit board assembly 120 is not good under the vibration working condition. The present embodiment effectively solves the vibration problem by assembling the control plate 121 and the driving plate 122 to the first housing 111 and the second housing 112, respectively.

In order to further ensure the functional use of the control board 121 and the driving board 122, in this embodiment, preferably, the electronic components on the control board 121 and the driving board 122 are both mounted on the upper surface of the corresponding control chip 124, so as to avoid connection failure of the electronic components due to gravity effect caused by the arrangement on the back surface, and reduce vibration risk.

In order to assemble the control board 121, in this embodiment, a connecting post 116 is disposed on one side of the top plate of the first housing 111 located in the mounting cavity, a threaded blind hole 117 is disposed in the connecting post 116, and the control board 121 is connected to the threaded blind hole 117 of the connecting post 116 through a connecting piece.

To address the connection of the control plate 121 and the drive plate 122 during assembly, a flat cable access window 118 is purposely provided in the side of the housing assembly 110. The plug connector connected to the first end of the flat cable 126 may be connected to the flat cable port of the driving board 122, after the first housing 111 and the second housing 112 are covered, the plug connector connected to the second end of the flat cable 126 may be connected to the flat cable port of the control board 121 through the flat cable operating window 118, and then the cover board 180 is mounted on the housing assembly 110 to close the flat cable operating window, so as to implement the package of the housing assembly 110.

In order to realize the electrical connection of the motor controller 100, the outer surface of the first housing 111 is further provided with a high voltage junction box 150, the high voltage junction box 150 has three assembly ports, and the three assembly ports are respectively provided with a first high voltage plug connector for electrically connecting with a power supply device, a second high voltage plug connector for electrically connecting with a DCDC and a third high voltage plug connector for electrically connecting with an air conditioner compressor, the plurality of plug connectors are integrated in the high voltage junction box 150, and none of the first high voltage plug connector, the second high voltage plug connector and the third high voltage plug connector is shown in the drawing.

To implement the functions of the motor controller 100, in this embodiment, the housing assembly 110 further includes an IGBT170 and a water cooling plate 160; the IGBT170 is disposed on the water cooling plate 160 and located in the mounting cavity, so as to implement heat dissipation and cooling of the IGBT 170.

In some embodiments, the driving plate 122 may be directly mounted to the second housing 112, and in this embodiment, the driving plate 122 is disposed on the water cooling plate 160 or the IGBT170 to be indirectly mounted to the second housing 112.

The arrangement of the water cooling plate 160 is not particularly limited in this embodiment, and in this embodiment, the water cooling plate 160 and the second housing 112 are integrally formed.

To control the heat dissipation and cooling of the capacitor 125 of the drive plate 122, in some embodiments, a capacitor mounting location may be further provided on the water cooling plate 160 to achieve heat transfer and cooling by surface contact.

In summary, the motor controller provided by the utility model has at least the following beneficial effects:

1) Through the surface protrusion at the casing assembly set up one can hold the holding part of electric capacity, just be equipped with the limit structure who is used for electric capacity spacing in the holding part, on the one hand can be to a certain extent spacing to electric capacity, limit structure realizes the heat conduction of electric capacity and holding part to with the heat transfer of electric capacity to the casing assembly, the holding part plays heat dissipation and fixed effect, avoids electric capacity inefficacy when vibrating.

2) The distance between the control chip and the heat radiation structure on the shell assembly is shortened through the accommodating part, so that the heat conduction path is shortened, and the improvement of heat radiation performance is facilitated. The control chip and the heat dissipation structure are in indirect contact heat transfer, and even can be in direct contact to transfer heat, so that the heat dissipation structure can spread the heat of the control chip finally, and the effect of cooling is achieved.

3) The control chip and the capacitor of the control board conduct heat and dissipate heat through the heat dissipation structure and the accommodating part on the first shell, the control chip and the capacitor of the driving board realize cooling and heat dissipation through the water cooling plate on the second shell, and the space utilization rate of the motor controller is high.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. The motor controller comprises a shell assembly, a circuit board assembly arranged in the shell assembly and a connector used for low-voltage electric connection, wherein the circuit board assembly comprises an electric connection circuit substrate, a control chip and a capacitor; the connector and the accommodating part are both protruded out of the outer surface of the shell assembly, and a limiting structure for limiting the capacitor is arranged in the accommodating part.

2. The motor controller of claim 1 further comprising a thermal pad disposed between the control chip and the heat dissipating structure, and wherein the thermal pad is in contact with the control chip.

3. The motor controller according to claim 2, wherein a sink is provided on an outer surface of the panel, and the heat radiation structure is provided in the sink and contacts a bottom of the sink; the heat conducting pad is arranged between the control chip and the tank bottom and is contacted with the control chip and the tank bottom.

4. The motor controller of claim 2 wherein the heat dissipating structure is a plurality of heat dissipating pins disposed in spaced relation; the protruding height of the connector is not smaller than the accommodating portion.

5. The motor controller according to any one of claims 1 to 4, wherein an inner surface of the accommodating portion is provided with a heat conductive cured paste; the inner profile of the accommodating part is matched with the shape of the capacitor.

6. The motor controller of any one of claims 1-4 wherein the circuit board assembly comprises a control board and a drive board; the control board and the driving board are arranged in the shell assembly at intervals; the heat dissipation structure, the connector and the containing part are arranged on a panel, close to the control panel, of the shell assembly.

7. The motor controller of claim 6 wherein the housing assembly includes first and second housings connected, the first and second housings enclosing a mounting cavity for mounting a circuit board assembly; the first shell is connected with the control board; the second shell is connected with the driving plate.

8. The motor controller of claim 7 wherein the inner surface of the first housing is provided with a connecting post having a threaded blind hole therein, and the control board is connected to the threaded blind hole of the connecting post by a connector.

9. The motor controller of claim 7 wherein the outer surface of the first housing is further provided with a high voltage junction box having three connectors for electrical connection with a power supply device, DCDC and an air conditioning compressor, respectively.

10. The motor controller of claim 7 wherein the housing assembly further comprises a water cooled plate, the water cooled plate being of unitary construction with the second housing; the motor controller also comprises an IGBT which is arranged on the water cooling plate and positioned in the mounting cavity; the driving plate is arranged on the water cooling plate or the IGBT.