Motor controller and power system

Abstract

The embodiment of the utility model discloses a motor controller and a power system. The motor controller comprises a direct current filtering module, a direct current bus capacitor and a power module. The direct-current bus capacitor and the power module are arranged in a first direction, the direct-current filtering module and the power module are arranged in a second direction, and the projection of the direct-current filtering module, the projection of the direct-current bus capacitor and the projection of the power module are not overlapped with each other by taking a third direction as a projection direction. According to the embodiment of the invention, the size of the motor controller in the third direction can be reduced, and flattening of the motor controller is facilitated.

Description

Technical Field

[0001] This application relates to the technical field of motor regulation, and particularly relates to a motor controller and a power system. Background Art

[0002] A motor controller is a device that controls the energy transfer between a power source and a motor. It is responsible for converting the direct current from a battery into an accurately controllable alternating current according to the control logic and outputting it to the motor, or for converting the alternating current from the motor into an accurately controllable direct current according to the control logic and outputting it to the battery.

[0003] In some application scenarios, it is required that the motor controller be flat to reduce its size in a predetermined direction. For example, in some power systems, the motor controller is arranged on one side of the motor axis to save the space in the radial direction of the motor and make the power system more compact. In this power system, it is necessary to minimize the size of the motor controller in the axial direction of the motor.

[0004] In the prior art, to improve the space utilization rate of the motor controller, the various components of the motor controller are stacked on top of each other, making the size of the motor controller balanced in all directions in three-dimensional space. The motor controller in the prior art cannot meet the requirement of making the motor controller flat. Summary of the Utility Model

[0005] Embodiments of this application provide a motor controller and a power system, which reduce the size of the motor controller in a predetermined direction and make the motor controller flatter.

[0006] To solve the above technical problems, embodiments of this application disclose the following technical solutions:

[0007] On the one hand, a motor controller is provided. The motor controller has a first direction, a second direction, and a third direction that are perpendicular to each other. The motor controller includes a DC filtering module, a DC bus capacitor, and a power module. The DC filtering module is used to filter direct current. The DC bus capacitor is electrically connected to the DC filtering module and is used to stabilize the direct current. The power module is electrically connected to the DC bus capacitor and is used to realize the mutual conversion between alternating current and direct current. Among them, the DC bus capacitor and the power module are arranged in the first direction, the DC filtering module and the power module are arranged in the second direction, and taking the third direction as the projection direction, the projections of the DC filtering module, the DC bus capacitor, and the power module do not overlap each other.

[0008] In addition to or as an alternative to one or more of the features disclosed above, the motor controller further includes a main control circuit board, which is electrically connected to the power module, and is used to control the power module to perform mutual conversion between AC and DC. A portion of the main control circuit board is stacked on one side of the power module in the third direction, and another portion of the main control circuit board is stacked on one side of the DC filter module in the third direction.

[0009] In addition to or as an alternative to one or more of the features disclosed above, the motor controller further includes an electromagnetic shielding component, and the DC filter module, the electromagnetic shielding component and the main control circuit board are arranged in sequence in a third direction.

[0010] In addition to one or more of the above-disclosed features, or as an alternative, the motor controller further comprises a housing component, the housing component is formed with a receiving groove, the receiving groove has an opening in a third direction, and the housing component is made of metal at least in the portion forming the receiving groove. The electromagnetic shielding component is sealed at the opening of the receiving groove, and is surrounded by the housing component to form a receiving cavity, the DC filter module is received in the receiving cavity, and the DC bus capacitor, the power module and the main control circuit board are all located outside the receiving cavity.

[0011] In addition to or as an alternative to one or more of the features disclosed above, the housing assembly includes a bottom wall, a side wall, a cover body, and a protruding rib. The side wall is arranged around the outer edge of the bottom wall and protrudes from the bottom wall in a third direction. The cover body and the bottom wall are arranged opposite to each other in the third direction, and the cover body is detachably connected to the side wall, and the cover body, the bottom wall, and the side wall are arranged to form an installation cavity. The protruding rib is located in the installation cavity and protrudes from the bottom wall, and the protruding rib, the side wall, and the bottom wall are arranged to form a receiving groove. Among them, the DC bus capacitor, the power module, and the main control circuit board are all located in the installation cavity, the DC filter module, the DC bus capacitor, and the power module are respectively fixedly connected to the bottom wall, and the main control circuit board is respectively stacked on the side of the power module and the DC filter module that is away from the bottom wall in the third direction.

[0012] In addition to or as an alternative to one or more of the features disclosed above, the DC filter module includes a first part and a second part, wherein the size of the first part in the third direction is smaller than the size of the second part in the third direction, wherein another part of the main control circuit board is stacked on one side of the first part in the third direction.

[0013] In addition to or as an alternative to one or more features disclosed above, the first portion is arranged opposite to the power module in the second direction, and in the first direction, the second portion protrudes from the power module toward a side of the power module away from the DC bus capacitor.

[0014] In addition to one or more of the features disclosed above, or as an alternative, the motor controller further includes an AC terminal, a conductive connector, and an AC sensor. The AC terminal is located on the side of the power module away from the DC bus capacitor in the first direction, and the AC terminal is used to electrically connect the motor. The conductive connector is respectively connected to the AC terminal and the power module, and the AC terminal and the power module are electrically connected through the conductive connector. The AC sensor is located between the AC terminal and the power module in the first direction, and the AC sensor is used to detect a predetermined parameter of the AC power passing through the conductive connector.

[0015] In addition to or as an alternative to one or more of the features disclosed above, the motor controller further comprises a bracket, which is located between the AC terminal and the power module in the first direction, wherein the AC sensor is arranged on the bracket.

[0016] On the other hand, the embodiment of the present application further provides a power system, the power system includes a motor and a motor controller. The motor has an axial direction. The motor controller is arranged on one side of the motor in the axial direction, the motor controller is any of the above motor controllers, and the third direction is the axial direction.

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] In the embodiment of the present application, the DC filter module, the DC bus capacitor and the power module are distributed in a plane perpendicular to the third direction. In the third direction, the DC filter module, the DC bus capacitor and the power module are not overlapped with each other, which is conducive to reducing the size of the motor controller in the third direction (predetermined direction), thereby facilitating the flattening of the motor controller. In addition, the DC bus capacitor and the power module are arranged in the first direction, and the DC filter module and the power module are arranged in the second direction. Compared with the arrangement of the DC bus capacitor, the DC filter module and the power module in the same direction, it is more conducive to reducing the area occupied by the DC bus capacitor, the DC filter module and the power module in the arrangement surface (the plane perpendicular to the third direction), making the motor controller more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0020] Figure 1 is a schematic diagram of a three-dimensional structure of an embodiment of a motor controller of the present application, wherein the cover is opened to show the internal structure;

[0021] Figure 2 yes Figure 1 The front view of the motor controller shown, omitting the cover, main control circuit board and electromagnetic shielding components;

[0022] Figure 3Yes Figure 1 The three-dimensional exploded view of the motor controller shown;

[0023] Figure 4 Yes Figure 1 The three-dimensional structural schematic diagram of the housing assembly in the motor controller shown, with the cover omitted;

[0024] Figure 5 Yes Figure 1 The front view of the housing assembly in the motor controller shown, with the cover omitted;

[0025] Figure 6 Yes Figure 1 The cross-sectional view of the motor controller in the motor controller shown, with the cover omitted;

[0026] Figure 7 It is the front view of an embodiment of the power system of the present application.

[0027] Explanation of reference numerals: 10 - housing assembly; 101 - bottom wall; 102 - side wall; 103 - protruding rib; 104 - receiving groove; 105 - opening; 106 - cover; 107 - receiving cavity; 108 - installation cavity; 20 - DC filtering module; 201 - first part; 202 - second part; 30 - DC bus capacitor; 40 - power module; 50 - main control circuit board; 60 - electromagnetic shielding member; 70 - AC busbar; 701 - AC terminal; 702 - AC sealing seat; 703 - conductive connecting member; 80 - sensor assembly; 801 - AC sensor; 802 - bracket; 90 - DC busbar; 901 - DC sealing seat; 902 - DC terminal; X - first direction; Y - second direction; Z - third direction. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and beneficial effects of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described in this specification are only for explaining the present application and not for limiting the present application.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "a plurality" refers to two or more, unless otherwise specifically defined.

[0030] Please refer to Figures 1 to 3 。 Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the motor controller of the present application, wherein the cover body 106 is opened to show the internal structure. Figure 2 is Figure 1 The front view of the shown motor controller, omitting the cover body 106, the main control circuit board 50, and the electromagnetic shielding member 60. Figure 3 is Figure 1 The three-dimensional exploded view of the shown motor controller.

[0031] For the convenience of description, the following definitions are made: The motor controller has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other in any two.

[0032] The motor controller includes a housing assembly 10, a DC filtering module 20, a DC bus capacitor 30, a power module 40, a main control circuit board 50, a DC bus bar 90, an AC bus bar 70, and a sensor assembly 80.

[0033] The housing assembly 10 is the structural main body of the motor controller and is used to install the remaining components of the motor controller. The housing assembly 10 encloses to form an installation cavity 108.

[0034] Please refer to Figure 4 and Figure 5 。 Figure 4 is Figure 1 The three-dimensional structural schematic diagram of the housing assembly 10 in the shown motor controller, omitting the cover body 106. Figure 5 is Figure 1 The front view of the housing assembly 10 in the shown motor controller, omitting the cover body 106.

[0035] The housing assembly 10 includes a bottom wall 101, a side wall 102, and a cover 106. The side wall 102 surrounds the outer edge of the bottom wall 101 and protrudes from the bottom wall 101 in the third direction Z. The cover 106 is disposed opposite to the bottom wall 101 in the third direction Z, and the cover 106 is detachably connected to the side wall 102. The cover 106, the bottom wall 101, and the side wall 102 surround to form an installation cavity 108. The cover 106 is designed to be detachable, so as to facilitate opening the installation cavity 108, and further facilitate maintaining the components in the installation cavity 108. The specific structure of the housing assembly 10 is not limited. In other embodiments, the cover 106 may not be provided. For example, when the motor controller is installed on the motor, the outer shell of the motor can serve as the cover 106.

[0036] The housing assembly 10 further includes a protruding rib 103. The protruding rib 103 is located in the installation cavity 108 and protrudes from the bottom wall 101. The protruding rib 103, the side wall 102, and the bottom wall 101 surround to form a receiving groove 104. The receiving groove 104 has an opening 105 in the third direction Z, so as to facilitate taking and placing the DC filter module 20 through the opening 105 during assembly or maintenance. Specifically, a part of the protruding rib 103 extends in the first direction X, and another part extends in the second direction Y. Avoidance notches may be formed on the protruding rib 103 to facilitate the connection of the DC filter module 20 accommodated in the receiving groove 104 to the DC bus capacitor 30 located outside the receiving groove 104. In other embodiments, the protruding rib 103 and the bottom wall 101 surround to form the receiving groove 104 without the side wall 102. In other embodiments, the bottom wall 101 is recessed in the third direction Z to form the receiving groove 104. The specific manner in which the housing assembly 10 forms the receiving groove 104 is not limited.

[0037] Please refer to Figure 6 . Figure 6 is Figure 1 a cross-sectional view of the motor controller in the shown motor controller, with the cover 106 omitted.

[0038] The electromagnetic shielding member 60 seals the opening 105 of the receiving groove 104 and surrounds with the housing assembly 10 to form a receiving cavity 107. Specifically, the electromagnetic shielding member 60 is detachably connected to the protruding rib 103 and the side wall 102. The electromagnetic shielding member 60 can be a metal housing. The receiving cavity 107 is located in the installation cavity 108.

[0039] At least the part of the housing assembly 10 that forms the receiving groove 104 is made of metal. Specifically, the housing assembly 10 is made of metal as a whole. In this way, an electromagnetic shielding structure is formed around the receiving cavity 107, which can perform electromagnetic shielding on the DC filter module 20, thereby avoiding noise coupling through space, and further avoiding the failure of the DC filter module 20 caused by noise.

[0040] The DC bus bar 90 is disposed in the housing assembly 10, with a part extending into the installation cavity 108 for electrical connection with the DC filtering module 20, and the other part located outside the installation cavity 108 for electrical connection with the battery. Specifically, the DC bus bar 90 includes a DC sealing seat 901 and DC terminals 902. The DC terminals 902 are hermetically fitted with the housing assembly 10 through the DC sealing seat 901. The DC terminals 902 are used for electrical connection with a battery (not shown in the figure). The number of DC terminals 902 is at least two, one DC terminal 902 is used for connecting the positive electrode of the battery, and the other DC terminal 902 is used for connecting the negative electrode of the battery. The DC bus bar 90 is optionally an existing technology.

[0041] The DC filtering module 20 is accommodated in the accommodation cavity 107 and fixedly connected to the bottom wall 101. The DC filtering module 20 is used for filtering direct current. The DC filtering module 20 improves the EMC performance of the motor controller by filtering out the interference signals generated when the power module 40 operates. Specifically, the DC filtering module 20 includes a positive electrode conductive member, a negative electrode conductive member, a magnetic ring, and a plurality of safety capacitors. The positive electrode conductive member and the negative electrode conductive member are respectively electrically connected to the DC bus bar 90, and the magnetic ring is sleeved outside the positive electrode conductive member and the negative electrode conductive member. The safety capacitors are respectively electrically connected to the positive electrode conductive member and the negative electrode conductive member, or the safety capacitors are connected to one of the positive electrode conductive member and the negative electrode conductive member and electrically connected to the grounding member. The safety capacitors are, for example, X capacitors or Y capacitors. The DC filtering module 20 is optionally an existing technology.

[0042] The electromagnetic shielding member 60 can also be used to assist in installing the DC filtering module 20. For example, the electromagnetic shielding member 60 and the bottom wall 101 clamp the magnetic ring in the DC filtering module 20 in the third direction Z, thereby fixing the position of the magnetic ring.

[0043] The DC bus capacitor 30 is located in the installation cavity 108 and fixedly connected to the bottom wall 101. The DC bus capacitor 30 is located outside the accommodation cavity 107. The DC bus capacitor 30 is electrically connected to the DC filtering module 20. Specifically, the DC bus capacitor 30 is used for stabilizing the voltage of direct current. The DC bus capacitor 30 is optionally an existing technology.

[0044] The power module 40 is located in the installation cavity 108 and fixedly connected to the bottom wall 101. The power module 40 is located outside the accommodation cavity 107. The power module 40 is also an IGBT (Insulated Gate Bipolar Transistor) power module. The power module 40 is electrically connected to the DC bus capacitor 30, and the power module 40 is used for realizing the mutual conversion between alternating current and direct current. In some embodiments, the power module 40 includes a single-tube power device, an insulation and heat conduction unit, a heat dissipation unit, and a temperature detection unit, and the insulation and heat conduction unit is disposed between the single-tube power device and the heat dissipation unit, and the temperature detection unit is disposed on the heat dissipation unit.

[0045] Among them, the DC bus capacitor 30 and the power module 40 are arranged in the first direction X, and the DC filter module 20 and the power module 40 are arranged in the second direction Y. Specifically, the DC bus capacitor 30 is adjacent to one side of the power module 40 in the first direction X, and the DC filter module 20 is adjacent to one side of the power module 40 in the second direction Y. The DC bus capacitor 30 and the DC filter module 20 surround the outer periphery of the power module 40.

[0046] Taking the third direction Z as the projection direction, the projections of the DC filter module 20, the projections of the DC bus capacitor 30, and the projection of the power module 40 do not overlap with each other.

[0047] The DC filter module 20, the DC bus capacitor 30, and the power module 40 are dispersed in a plane perpendicular to the third direction Z. In the third direction Z, the DC filter module 20, the DC bus capacitor 30, and the power module 40 do not overlap with each other, which is beneficial to reducing the size of the motor controller in the third direction Z (predetermined direction), thereby facilitating the flattening of the motor controller. In addition, the DC bus capacitor 30 and the power module 40 are arranged in the first direction X, and the DC filter module 20 and the power module 40 are arranged in the second direction Y. Compared with the arrangement of the DC bus capacitor 30, the DC filter module 20, and the power module 40 in the same direction, it is more beneficial to reduce the area occupied by the DC bus capacitor 30, the DC filter module 20, and the power module 40 in the arrangement plane (plane perpendicular to the third direction Z), making the motor controller more compact.

[0048] The main control circuit board 50 is located in the installation cavity 108 and outside the accommodation cavity 107. The main control circuit board 50 is electrically connected to the power module 40, and the main control circuit board 50 is used to control the power module 40 to perform the mutual conversion between alternating current and direct current. In some embodiments, the main control circuit board 50 includes a PCB board and an MCU (Microcontroller Unit) disposed on the PCB board. The MCU is also called a single-chip microcomputer (Single Chip Microcomputer) or a single-chip microcontroller. It appropriately reduces the frequency and specifications of the CPU (Central Process Unit), and integrates peripheral interfaces such as memory, counter (Timer), USB, A / D conversion, UART, PLC, DMA, and even the LCD driving circuit on a single chip to form a chip-level computer for different combinations of control for different application scenarios. The MCU outputs control signals to control the on and off of each single-tube power device. Optionally, the main control circuit board 50 and the power module 40 are electrically connected through conductive pins inserted and mated in the third direction Z.

[0049] A part of the main control circuit board 50 is stacked on one side of the power module 40 in the third direction Z, and another part of the main control circuit board 50 is stacked on one side of the DC filtering module 20 in the third direction Z. Specifically, the main control circuit board 50 is stacked on one side of the power module 40 and the DC filtering module 20 in the third direction Z away from the bottom wall 101.

[0050] Specifically, the DC filtering module 20 includes a first part 201 and a second part 202. The size of the first part 201 in the third direction Z is smaller than that of the second part 202 in the third direction Z. The first part 201 is disposed opposite to the power module 40 in the second direction Y. In the first direction X, the second part 202 protrudes from the power module 40 toward the side of the power module 40 away from the DC bus capacitor 30. Among them, another part of the main control circuit board 50 is stacked on one side of the first part 201 in the third direction Z.

[0051] The DC filtering module 20, the electromagnetic shielding member 60, and the main control circuit board 50 are arranged in sequence in the third direction Z. Specifically, the electromagnetic shielding member 60 covers the DC filtering module 20, and the main control board covers the electromagnetic shielding member 60 at the corresponding position of the first part 201.

[0052] The DC filtering module 20 is designed with different sizes in the third direction Z, and is set to be smaller at the corresponding position of the main control circuit board 50, which is beneficial to reducing the overall size of the motor controller in the third direction Z.

[0053] The part of the main control circuit board 50 corresponding to the power module 40 is fixedly connected to the power module 40, and the part of the main control circuit board 50 corresponding to the first part 201 is fixedly connected to the electromagnetic shielding member 60.

[0054] In some embodiments, the main control circuit board 50 includes a control board and a drive board. Among them, the control board is stacked on one side of the power module 40 in the third direction Z, and the drive board is stacked on one side of the first part 201 in the third direction Z.

[0055] The AC bus bar 70 is disposed in the housing assembly 10. One part extends into the installation cavity 108 to be electrically connected to the power module 40, and the other part is located outside the installation cavity 108 to be electrically connected to the motor.

[0056] Specifically, the AC busbar 70 includes an AC terminal 701, an AC sealing seat 702 and a conductive connector 703. The AC terminal 701 is sealed with the housing assembly 10 through the AC sealing seat 702. The number of AC terminals 701 is at least three. The three AC terminals 701 are respectively used to electrically connect to the U / V / W three-phase electrical terminals of the motor. The AC terminal 701 extends in the third direction Z to be plugged and matched with the motor in the third direction Z for electrical connection. The number of conductive connectors 703 is equal to that of the AC terminal 701 and corresponds one to one. Each conductive connector 703 is respectively connected to the corresponding AC terminal 701 and the power module 40. The AC terminal 701 is electrically connected to the power module 40 through the conductive connector 703.

[0057] The AC busbar 70 is disposed on the second portion 202 of the DC filter module 20 toward the power module 40 in the second direction Y. The AC busbar 70 is disposed on the power module 40 in the first direction X away from the DC bus capacitor 30 .

[0058] The sensor assembly 80 is located in the installation cavity 108 and outside the accommodating cavity 107. The sensor assembly 80 is disposed in the first direction X between the AC busbar 70 and the power module 40.

[0059] Specifically, the sensor assembly 80 includes a bracket 802 and an AC sensor 801. The bracket 802 is located between the AC terminal 701 and the power module 40 in the first direction X. The AC sensor 801 is arranged on the bracket 802. The AC sensor 801 is located between the AC terminal 701 and the power module 40 in the first direction X, and the AC sensor 801 is used to detect a predetermined parameter of the alternating current passing through the conductive connector 703. The number of the AC sensors 801 is equal to that of the conductive connector 703, and they correspond one to one. Each AC sensor 801 is used to detect a predetermined parameter of the alternating current passing through the corresponding conductive connector 703. The AC sensor 801 is also electrically connected to the main control circuit board 50.

[0060] In the related art, the AC sensor 801 is disposed on the AC terminal 701 to detect predetermined parameters of the AC power passing through the AC terminal 701. In this embodiment, the AC sensor 801 is disposed between the AC terminal 701 and the power module 40, which is beneficial to reducing the size of the motor controller in the third direction Z at the AC terminal 701.

[0061] In one scenario, the process of assembling a motor controller includes the following steps:

[0062] Place the DC filter module 20 in the receiving groove 104 and fix the DC filter module 20 to the housing assembly 10 (the cover 106 is in an open state);

[0063] Fix the electromagnetic shielding member 60 to the housing assembly 10 (with the cover 106 in the open state) so that the electromagnetic shielding member 60 covers the accommodation groove 104;

[0064] Fix the DC bus capacitor 30, the power module 40, the AC bus bar 70, and the sensor assembly 80 to the housing assembly 10 (with the cover 106 in the open state) respectively;

[0065] Stack the main control circuit board 50 on the power module 40 and the electromagnetic shielding member 60, and fix and connect the main control circuit board 50 to the power module 40 and the electromagnetic shielding member 60 respectively.

[0066] Please refer to Figure 7 。 Figure 7 is the front view of an embodiment of the power system of the present application.

[0067] The embodiment of the present application further provides a power system, which includes a motor 2 and a motor controller 1. The motor 2 has an axial direction. Specifically, the mover and rotor of the motor 2 rotate around the reference axis L. The extending direction of the reference axis L is the axial direction of the motor 2.

[0068] The motor controller 1 is arranged on one side of the motor 2 in the axial direction, and the motor controller 1 is the motor controller 1 in any of the above embodiments. After the motor controller 1 is installed on the motor 2, the above-mentioned third direction Z is the axial direction of the motor 2.

[0069] The axial dimension of the motor controller 1 on the motor 2 can be reduced, so that the axial dimension of the power system can be reduced.

[0070] Since the motor 2 includes all the technical features of the motor controller 1, therefore, the motor 2 also has all the technical effects of the motor controller 1, which will not be elaborated here.

[0071] In summary, the embodiment of the present application can reduce the dimension of the motor controller in the predetermined direction, making the motor controller more flattened.

[0072] The introduction provided in the above steps is only used to help understand the method, structure and core idea of the present application. For those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A motor controller, characterized in that: The motor controller has a first direction, a second direction and a third direction, any two of which are perpendicular to each other, and the motor controller includes: A DC filter module, used for filtering DC power; A DC bus capacitor is electrically connected to the DC filter module, and the DC bus capacitor is used to stabilize the DC power; A power module, electrically connected to the DC bus capacitor, the power module being used to realize mutual conversion between AC power and DC power; Among them, the DC bus capacitor and the power module are arranged in the first direction, the DC filter module and the power module are arranged in the second direction, and the third direction is used as the projection direction. The projection of the DC filter module, the projection of the DC bus capacitor and the projection of the power module do not overlap with each other.

2. The motor controller according to claim 1, characterized in that: Also includes: A main control circuit board, electrically connected to the power module, and used to control the power module to perform mutual conversion between alternating current and direct current; A portion of the main control circuit board is stacked on one side of the power module in the third direction, and another portion of the main control circuit board is stacked on one side of the DC filter module in the third direction.

3. The motor controller according to claim 2, characterized in that: Also includes: The electromagnetic shielding component, the DC filter module, the electromagnetic shielding component and the main control circuit board are arranged in sequence in the third direction.

4. The motor controller according to claim 3, characterized in that: Also includes: A shell component, wherein the shell component is formed with a receiving groove, the receiving groove is open in the third direction, and the shell component is made of metal at least in a portion forming the receiving groove; The electromagnetic shielding component is sealed at the opening of the accommodating groove and is surrounded by the shell assembly to form an accommodating cavity. The DC filter module is accommodated in the accommodating cavity, and the DC bus capacitor, the power module and the main control circuit board are all located outside the accommodating cavity.

5. The motor controller according to claim 4, characterized in that: The housing assembly comprises: bottom wall; A side wall, arranged around the outer edge of the bottom wall and protruding from the bottom wall in the third direction; A cover body is arranged opposite to the bottom wall in the third direction, the cover body is detachably connected to the side wall, and the cover body, the bottom wall and the side wall surround and form a mounting cavity; A protruding rib is located in the installation cavity and protrudes from the bottom wall, wherein the protruding rib, the side wall and the bottom wall surround and form the receiving groove; Among them, the DC bus capacitor, the power module and the main control circuit board are all located in the installation cavity, the DC filter module, the DC bus capacitor and the power module are respectively fixedly connected to the bottom wall, and the main control circuit board is respectively stacked on the side of the power module and the DC filter module away from the bottom wall in the third direction.

6. The motor controller according to claim 2, characterized in that: The DC filter module includes a first part and a second part, wherein the size of the first part in the third direction is smaller than the size of the second part in the third direction; Wherein, the other part of the main control circuit board is stacked on one side of the first part in the third direction.

7. The motor controller according to claim 6, characterized in that: The first portion and the power module are arranged opposite to each other in the second direction. In the first direction, the second portion protrudes from the power module toward a side of the power module away from the DC bus capacitor.

8. The motor controller according to claim 1, characterized in that: Also includes: an AC terminal, located at a side of the power module away from the DC bus capacitor in the first direction, the AC terminal being used for electrically connecting to a motor; Conductive connectors are respectively connected to the AC terminal and the power module, and the AC terminal and the power module are electrically connected through the conductive connectors; An AC sensor is located between the AC terminal and the power module in the first direction, and is used to detect a predetermined parameter of the AC power passing through the conductive connection member.

9. The motor controller according to claim 8, characterized in that: Also includes: a bracket, located between the AC terminal and the power module in the first direction; Wherein, the AC sensor is arranged on the bracket.

10. A power system, characterized in that: include: The motor has an axial direction; A motor controller is arranged on one side of the motor in the axial direction, the motor controller is any one of claims 1 to 9, and the third direction is the axial direction.

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