Electric motor controller, electric driving apparatus, electric driving system and electric device

Abstract

Provided in the present application are an electric motor controller (11), an electric driving apparatus (10), an electric driving system (1) and an electric device. The electric motor controller (11) comprises a case (111), a first power module (112) and a first alternating-current connector (113), wherein the case (111) is provided with a first accommodating cavity (1111) and a first lead-out hole (1112), the first accommodating cavity (1111) being in communication with the external environment of the case (111) through the first lead-out hole (1112); the first power module (112) is accommodated in the first accommodating cavity (1111); and the first alternating-current connector (113) comprises a first input terminal (1131) and a first output terminal (1132), the first input terminal (1131) being electrically connected to the first power module (112), and the first output terminal (1132) extending through the first lead-out hole (1112) to the outside of the case (111) and being directly electrically connected to an electric motor.

Description

Motor controllers, electric drive units, electric drive systems and electric equipment

[0001] Cross-referencing

[0002] This application incorporates Chinese Patent Application No. 202421607263.4, filed on July 8, 2024, entitled “Electric Motor Controller, Electric Drive Device, Electric Drive System and Electric Equipment”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application belongs to the field of electric drive technology, and more specifically, relates to a motor controller, electric drive device, electric drive system and electric equipment. Background Technology

[0004] With increasing environmental pollution, new energy vehicles are gaining popularity. The electric drive system, as the power unit of new energy vehicles, converts electrical energy from the battery into mechanical energy to propel the vehicle. Improving the performance of electric drive systems is a crucial technical challenge that urgently needs to be addressed in the development of new energy technologies. Summary of the Invention

[0005] The purpose of this application is to provide a motor controller, an electric drive device, an electric drive system, and an electric equipment to solve the technical problem of poor performance of electric drive devices in related technologies.

[0006] To achieve the above objectives, the technical solution adopted in this application embodiment is: to provide a motor controller, including:

[0007] The enclosure has a first cavity and a first outlet hole, the first cavity being connected to the external environment of the enclosure through the first outlet hole;

[0008] The first power module is housed within the first cavity;

[0009] The first AC connector includes a first input terminal and a first output terminal. The first input terminal is electrically connected to the first power module, and the first output terminal extends from the first cavity through the first lead-out hole to the external environment of the housing and is used for direct electrical connection to the motor.

[0010] The motor controller provided in this application embodiment has at least the following beneficial effects: The motor controller provided in this application embodiment extends the first output terminal of the first AC connector through the first lead hole to the external environment of the housing, so that the first output terminal can be directly electrically connected to the motor without the need for components such as wire harnesses and adapters to electrically connect the first output terminal to the motor. This effectively reduces the number of parts in the electric drive device and effectively shortens the current transmission path between the motor controller and the motor, thereby effectively reducing stray inductance and lead inductance generated during current transmission and effectively improving the performance of the electric drive device using the above-mentioned motor controller.

[0011] In some embodiments of this application, the first outlet hole is located at the bottom of the housing.

[0012] By adopting the above technical solution, it is convenient to extend the first output terminal to the external environment of the enclosure and electrically connect it to the motor, which further shortens the current transmission path between the motor controller and the motor, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device using the above motor controller.

[0013] In some embodiments of this application, the motor controller further includes a first seal, and the first output terminal is sealed to the first lead-out hole through the first seal.

[0014] By adopting the above technical solution, the sealing performance of the motor controller has been effectively improved.

[0015] In some embodiments of this application, the housing is further provided with a second outlet hole, and the first cavity is also connected to the external environment of the housing through the second outlet hole. The motor controller further includes a second power module and a second AC connector. The second power module is housed in the first cavity, and the second AC connector includes a second input terminal and a second output terminal. The second input terminal is electrically connected to the second power module, and the second output terminal extends from the first cavity through the second outlet hole to the external environment of the housing. The first output terminal is used to directly electrically connect to one motor, and the second output terminal is used to directly electrically connect to another motor.

[0016] By adopting the above technical solution, the motor controller can control two motors simultaneously without the need for wiring harnesses, adapters, or other components to electrically connect the motor controller to the two motors. This further reduces the number of parts in the electric drive device and effectively shortens the current transmission path between the motor controller and the two motors, thereby further reducing stray inductance and lead inductance generated during current transmission and further improving the performance of the electric drive device using the above motor controller.

[0017] In some embodiments of this application, the first power module and the second power module are arranged side by side along a first direction, which is perpendicular to the height direction of the motor controller.

[0018] By adopting the above technical solution, the height of the motor controller is effectively reduced, which not only makes the structure of the motor controller more compact, but also further shortens the current transmission path between the motor controller and the motor, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device using the above motor controller.

[0019] In some embodiments of this application, a first AC power connector is disposed on the side of the first power module facing away from the second power module, and a second AC power connector is disposed on the side of the second power module facing away from the first power module.

[0020] By adopting the above technical solution, the current transmission path between the motor controller and the motor is further shortened, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device using the above motor controller.

[0021] In some embodiments of this application, the second outlet hole is located at the bottom of the housing.

[0022] By adopting the above technical solution, it is convenient to extend the second output terminal to the external environment of the enclosure and electrically connect it to the motor, which further shortens the current transmission path between the motor controller and the motor, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device using the above motor controller.

[0023] In some embodiments of this application, the motor controller further includes a second seal, and the second output terminal is sealed to the second lead-out hole through the second seal.

[0024] By adopting the above technical solution, the sealing performance of the motor controller has been effectively improved.

[0025] In some embodiments of this application, the motor controller further includes a DC connector disposed between the first power module and the second power module. The DC connector includes a third output terminal and a fourth output terminal. The third output terminal is electrically connected to the first power module, and the fourth output terminal is electrically connected to the second power module.

[0026] By adopting the above technical solution, the first power module and the second power module can share a DC power connector, which effectively reduces the number of components in the motor controller, makes the structure of the motor controller more compact, and thus effectively reduces the size of the motor controller.

[0027] In some embodiments of this application, the housing is provided with cooling channels, which include a main channel, a first branch channel and a second branch channel. The first branch channel and the second branch channel are connected to the main channel. A first power module is disposed on the first branch channel to cool the first power module, and a second power module is disposed on the second branch channel to cool the second power module.

[0028] By adopting the above technical solution, the cooling effect of the first power module and the second power module is effectively improved, the temperature difference between the first power module and the second power module is reduced, thereby effectively improving the performance of the motor controller.

[0029] In some embodiments of this application, the housing has a second cavity, and the motor controller further includes a capacitor housed in the second cavity and disposed on the main channel to cool the capacitor.

[0030] By adopting the above technical solution, the cooling effect on the capacitor is effectively improved, thereby further enhancing the performance of the motor controller.

[0031] In some embodiments of this application, the capacitor includes a core that is encapsulated within a second cavity.

[0032] By adopting the above technical solution, the cooling effect on the capacitor is further improved, thereby further enhancing the performance of the motor controller.

[0033] In some embodiments of this application, the flow area of ​​the first branch channel is equal to the flow area of ​​the second branch channel.

[0034] By adopting the above technical solution, the temperature difference between the first power module and the second power module is further reduced, thereby further improving the performance of the motor controller.

[0035] In some embodiments of this application, cooling channels are located at the bottom of the housing.

[0036] By adopting the above technical solution, it is easy to set up cooling channels on the box, which effectively simplifies the structure of the box.

[0037] This application also provides an electric drive device, including a first motor and a motor controller as described in any of the above embodiments, wherein a first output terminal is directly electrically connected to the first motor.

[0038] The electric drive device provided in this application embodiment has at least the following beneficial effects: the electric drive device provided in this application embodiment effectively improves the performance of the electric drive device by using the motor controller described in any of the above embodiments.

[0039] This application also provides an electric drive device, including a first motor, a second motor, and a motor controller as described in any of the above embodiments, wherein a first output terminal is directly electrically connected to the first motor, and a second output terminal is directly electrically connected to the second motor.

[0040] The electric drive device provided in this application embodiment has at least the following beneficial effects: the electric drive device provided in this application embodiment effectively improves the performance of the electric drive device by using the motor controller described in any of the above embodiments.

[0041] This application also provides an electric drive system, including a battery and an electric drive device as described in any of the above embodiments, wherein the battery is electrically connected to the electric drive device.

[0042] The electric drive system provided in this application embodiment has at least the following beneficial effects: the electric drive system provided in this application embodiment effectively improves the performance of the electric drive system by adopting the electric drive device described in any of the above embodiments.

[0043] This application also provides an electric device, including the above-described electric drive system.

[0044] The electric device provided in this application embodiment has at least the following beneficial effects: the electric device provided in this application embodiment effectively improves the performance of the electric device by adopting the electric drive system described in any of the above embodiments. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 is a structural schematic diagram of the vehicle provided in an embodiment of this application;

[0047] Figure 2 is a schematic diagram of the exploded structure of the battery provided in an embodiment of this application;

[0048] Figure 3 is a schematic diagram of the structure of the electric drive device provided in an embodiment of this application;

[0049] Figure 4 is a schematic diagram of the motor controller in the electric drive device shown in Figure 3;

[0050] Figure 5 is an exploded structural diagram of the motor controller shown in Figure 4;

[0051] Figure 6 is a schematic diagram of the structure of the first AC power connector in the motor controller shown in Figure 5;

[0052] Figure 7 is a schematic diagram of the structure of the second AC power connector in the motor controller shown in Figure 5;

[0053] Figure 8 is a schematic diagram of the left-side structure of the motor controller shown in Figure 4;

[0054] Figure 9 is a cross-sectional view of the motor controller shown in Figure 8 along line AA.

[0055] Figure 10 is a schematic diagram of the main structure of the motor controller shown in Figure 4;

[0056] Figure 11 is a cross-sectional view of the motor controller shown in Figure 10 along the BB line.

[0057] In the figures, the following reference numerals are used: 1. Electric drive system; 10. Electric drive device; 11. Motor controller; 111. Housing; 1111. First cavity; 1112. First outlet hole; 1113. Second outlet hole; 1114. Cooling channel; 11141. Main channel; 11142. First branch channel; 11143. Second branch channel; 1115. Second cavity; 112. First power module; 113. First AC power connector; 1131. First input terminal; 1132. First output terminal; 1133, First insulator; 114, Second power module; 115, Second AC connector; 1151, Second input terminal; 1152, Second output terminal; 1153, Second insulator; 116, DC connector; 1161, Third output terminal; 1162, Fourth output terminal; 1163, Third input terminal; 117, Capacitor; 1171, Core; 118, First seal; 119, Second seal; 12, First motor; 13, Second motor; 20, Battery; 21, Battery box; 211, First part; 212, Second part; 22, Battery cell; 2, Vehicle body. Detailed Implementation

[0058] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0059] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0060] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0062] An electric drive device is a device used to convert electrical energy into mechanical energy. An electric drive device typically includes a motor and a motor controller. The motor controller converts direct current into alternating current and transmits the alternating current to the motor to drive it. The motor controller can also be used to control the motor's operation, such as controlling its speed.

[0063] In related technologies, a motor controller includes a housing, a power module, AC connectors, and DC connectors. The housing houses the power module, AC connectors, and DC connectors, and is equipped with AC and DC terminals. One end of the AC connector is electrically connected to the AC output terminal of the power module, and the other end is directly or indirectly connected to the AC terminal. One end of the DC connector is electrically connected to the DC input terminal of the power module, and the other end is directly or indirectly connected to the DC terminal. The motor controller is electrically connected to the motor via an AC wiring harness. Specifically, one end of the AC wiring harness is electrically connected to the AC terminal of the motor, and the other end is electrically connected to the AC terminal. During operation, DC current is input to the motor controller from the DC terminal, then input to the power module via the DC connector. The power module converts the DC current into AC current, which is then transmitted to the motor sequentially via the AC connector, the AC terminal, and the AC wiring harness.

[0064] However, electric drive devices in related technologies not only have a large number of components, but also a long current transmission path between the motor controller and the motor, resulting in a large amount of stray inductance and lead inductance during current transmission, which is not conducive to improving the performance of electric drive devices.

[0065] To improve the performance of electric drive devices, the motor controller provided in this application embodiment allows the first output terminal of the first AC connector to be directly electrically connected to the motor by extending it through the first lead-out hole into the external environment of the housing. This eliminates the need for components such as wiring harnesses and adapters to connect the first output terminal to the motor, effectively reducing the number of parts in the electric drive device. It also effectively shortens the current transmission path between the motor controller and the motor, thereby effectively reducing stray inductance and lead inductance generated during current transmission and effectively improving the performance of the electric drive device using the aforementioned motor controller.

[0066] The technical solutions described in this application are applicable to electric drive devices and electrical equipment using electric drive devices. The electrical equipment can be, but is not limited to, vehicles, ships, spacecraft, and electric toys, etc. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc. For ease of explanation, the following embodiments use a vehicle as an example of the electric equipment in one embodiment of this application.

[0067] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0068] Please refer to Figure 1, which is a structural schematic diagram of the vehicle provided in this embodiment. The vehicle includes a body 2, a battery 20, and an electric drive unit 10. The body 2 is the main supporting component of the vehicle, and has an engine compartment and a passenger compartment. The engine compartment is used to house the electric drive unit 10, and the passenger compartment provides operating and seating space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is located at the front of the body 2, i.e., the engine compartment is the front engine compartment; when the vehicle is a rear-wheel drive vehicle, the engine compartment is located at the rear of the body 2, i.e., the engine compartment is the rear engine compartment; when the vehicle is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the body 2 and the rear engine compartment located at the rear of the body 2. There can be two electric drive units 10, with the two electric drive units 10 located in the front engine compartment and the rear engine compartment, respectively. The battery 20 and the electric drive unit 10 together constitute the electric drive system 1 of the vehicle. The battery 20 can be located at the bottom, front, or rear of the vehicle. The battery 20 can supply power to the electric drive unit 10 to drive the electric drive unit 10. The electric drive unit 10 is used to convert the electrical energy provided by the battery 20 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle.

[0069] Please refer to Figure 2, which is an exploded view of the battery 20 provided in an embodiment of this application. The battery 20 includes a battery case 21 and a battery cell 22, with the battery cell 22 housed within the battery case 21. The battery case 21 provides a space for the battery cell 22 and can have various structures. In some embodiments, the battery case 21 may include a first portion 211 and a second portion 212, which overlap each other, jointly defining a space for accommodating the battery cell 22. The second portion 212 may be a hollow structure with one open end, and the first portion 211 may be a plate-like structure, covering the open side of the second portion 212 so that the first portion 211 and the second portion 212 jointly define the space. Alternatively, the first portion 211 and the second portion 212 may both be hollow structures with one open side, with the open side of the first portion 211 covering the open side of the second portion 212 so that the first portion 211 and the second portion 212 jointly define the space. Of course, the battery box 21 formed by the first part 211 and the second part 212 can be of various shapes, such as cylinder, cuboid, etc., and no specific limitation is made here.

[0070] In some embodiments, the battery box 21 may be part of the vehicle's chassis structure. For example, a portion of the battery box 21 may be at least a portion of the vehicle's floor, or a portion of the battery box 21 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0071] Of course, in some embodiments, the battery 20 may not include the battery box 21, but rather multiple battery cells 22 are electrically connected and assembled into the vehicle after being formed into a whole by necessary fixing structures.

[0072] In battery 20, there can be multiple battery cells 22, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 22 are connected in both series and parallel configurations. Multiple battery cells 22 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 22 is housed within battery box 21. Alternatively, battery 20 can also consist of multiple battery cells 22 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules connected in series, parallel, or in a mixed manner to form a whole, which is then housed within battery box 21. Battery 20 may also include other functional components; for example, it may include a busbar for electrical connection between the multiple battery cells 22.

[0073] Each battery cell 22 can be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can be recharged to activate its active materials and continue to be used after being discharged. A primary battery cell refers to a battery cell 22 that cannot be recharged to activate its active materials and continue to be used after its electrical energy is depleted. The battery cell 22 can also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but is not limited thereto. The battery cell 22 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 22 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc. This application does not have any particular limitations.

[0074] Please refer to Figure 3, which is a schematic diagram of the structure of the electric drive device 10 provided in an embodiment of this application. The electric drive device 10 includes a first motor 12 and a motor controller 11. The first motor 12 is used to convert the electrical energy provided by the battery 20 into mechanical energy. The first motor 12 can be, but is not limited to, an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc. The electric drive device 10 may also include a second motor 13, which is used to convert the electrical energy provided by the battery 20 into mechanical energy. The second motor 13 can be, but is not limited to, an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc. During the operation of the electric drive device 10, the rotational speed of the first motor 12 and the rotational speed of the second motor 13 can be the same, or the rotational speeds of the first motor 12 and the second motor 13 can be different.

[0075] In some embodiments, the shafts of the first motor 12 and the second motor 13 are parallel, and the first motor 12 may be coaxially arranged with the second motor 13, that is, the central axis of the first motor 12 and the central axis of the second motor 13 coincide. The "central axis" of the motor refers to the axial center line of the motor's shaft (or "rotor shaft"). As an example, the shaft of the first motor 12 is connected to one of the left front wheel and the right front wheel of the vehicle, and the shaft of the second motor 13 is connected to the other of the left front wheel and the right front wheel of the vehicle; or, the shaft of the first motor 12 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the shaft of the second motor 13 is connected to the other of the left rear wheel and the right rear wheel of the vehicle.

[0076] Of course, in other embodiments, the first motor 12 may also be coaxial with the second motor 13, that is, the central axis of the second motor 13 may be spaced apart from the central axis of the first motor 12 in any direction perpendicular to the central axis of the first motor 12.

[0077] The motor controller 11 is used to convert the DC current output by the battery 20 into AC current and send the AC current to the first motor 12 and the second motor 13. The motor controller 11 can also be used to control the operation of the first motor 12 and the second motor 13. For example, the motor controller 11 is used to control the start-stop, speed, torque, etc. of the first motor 12 and the second motor 13. In other words, the first motor 12, the second motor 13, and the battery 20 are electrically connected to the motor controller 11. The DC current output by the battery 20 can be transmitted to the motor controller 11 through the current transmission path between the battery 20 and the motor controller 11. After the motor controller 11 converts the DC current into AC current, the AC current can be transmitted to the first motor 12 and the second motor 13 through the current transmission paths between the motor controller 11 and the first motor 12 and between the motor controller 11 and the second motor 13 to drive the first motor 12 and the second motor 13 to operate. At the same time, the control signal of the motor controller 11 can be transmitted to the first motor 12 through the current transmission path between the motor controller 11 and the first motor 12, and can be transmitted to the second motor 13 through the current transmission path between the motor controller 11 and the second motor 13. The operating status signal of the first motor 12 can be transmitted to the motor controller 11 through the current transmission path between the motor controller 11 and the first motor 12, and the operating status signal of the second motor 13 can be transmitted to the motor controller 11 through the current transmission path between the motor controller 11 and the second motor 13, so that the motor controller 11 can control the operation of the first motor 12 and the second motor 13.

[0078] The electric drive unit 10 may further include a transmission mechanism for transmitting the mechanical energy to the vehicle wheels by changing the speed and torque of the first motor 12 and the second motor 13. For example, the transmission mechanism transmits the mechanical energy to the vehicle wheels by decreasing the speed of the first motor 12 and the speed of the second motor 13 while increasing the torque of the first motor 12 and the second motor 13. Alternatively, the transmission mechanism transmits the mechanical energy to the vehicle wheels by increasing the speed of the first motor 12 and the speed of the second motor 13 while decreasing the torque of the first motor 12 and the second motor 13. The transmission mechanism may be, but is not limited to, a gear transmission mechanism, a worm gear transmission mechanism, a planetary gear transmission mechanism, a continuously variable transmission mechanism, etc.

[0079] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0080] Firstly, referring to Figures 4 to 9, this application embodiment provides a motor controller 11, including a housing 111, a first power module 112, and a first AC connector 113. The housing 111 has a first cavity 1111 and a first outlet hole 1112, the first cavity 1111 communicating with the external environment of the housing 111 through the first outlet hole 1112. The first power module 112 is housed within the first cavity 1111. The first AC connector 113 includes a first input terminal 1131 and a first output terminal 1132. The first input terminal 1131 is electrically connected to the first power module 112, and the first output terminal 1132 extends from the first cavity 1111 through the first outlet hole 1112 into the external environment of the housing 111 and is used for direct electrical connection to the motor.

[0081] The motor controller 11 has a height direction, a length direction, and a width direction. For example, the height direction can be the Z direction as shown in Figures 4, 5, 8, and 9; the length direction can be the X direction as shown in Figures 4, 5, and 9; and the width direction can be the Y direction as shown in Figures 4, 5, and 8. Since the housing 111 defines the shape of the motor controller 11, the height, length, and width directions of the motor controller 11 are the same as the height, length, and width directions of the housing 111. It should be noted that the dimension of the motor controller 11 along the length direction can be equal to or unequal to the dimension of the motor controller 11 along the width direction.

[0082] The housing 111 is a component that provides an internal mounting environment for the motor controller 11. An opening can be provided on the housing 111, through which components such as the first power module 112 can be assembled into the internal mounting environment of the motor controller 11. The housing 111 can be a single-piece molded component or an assembled component composed of multiple parts. The material of the housing 111 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc. At least a portion of the space within the internal mounting environment of the motor controller 11 constitutes the aforementioned first cavity 1111, which is used to accommodate components such as the first power module 112. A first outlet hole 1112 penetrates the wall of the housing 111 to connect the first cavity 1111 with the external environment of the housing 111. The first outlet hole 1112 can be located on any wall of the housing 111, for example, on the bottom wall of the housing 111, or on the side wall of the housing 111.

[0083] In some embodiments, the motor controller 11 may further include a cover, which is disposed on the opening side of the housing 111 to isolate the internal installation environment from the external environment of the housing 111. The cover may be integrally connected to the housing 111, for example, by welding the cover to the housing 111 after it is disposed on the housing 111. The cover may also be detachably connected to the housing 111, for example, by fasteners such as bolts or screws. The material of the cover may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0084] The first power module 112 is used to convert the DC current output by the battery 20 into AC current. The first power module 112 can be, but is not limited to, a silicon carbide power module, an insulated gate bipolar transistor (IGBT) power module, etc.

[0085] In some embodiments, the motor controller 11 may further include a main control module and a drive module. The main control module is the core control device of the motor controller 11, used to control the operation of the motor, such as controlling the motor's start / stop, speed, and torque. The drive module is electrically connected between the main control module and the first power module 112, and is used to convert the logic signals output by the main control module into voltage and current signals required to drive the first power module 112. The main control module and the drive module can be integrated into a single unit, or they can be configured as two independent electronic devices.

[0086] The first AC connector 113 is a component used to electrically connect the first power module 112 and the motor. The first input terminal 1131 of the first AC connector 113 is electrically connected to the AC output terminal of the first power module 112, and the first output terminal 1132 of the first AC connector 113 is electrically connected to the AC input terminal of the motor. The first AC connector 113 can be, but is not limited to, a copper busbar or wire.

[0087] Direct electrical connection of the first output terminal 1132 to the motor means that there is no intermediate component between the first output terminal 1132 and the AC input terminal of the motor; instead, the first output terminal 1132 is in direct contact with and connected to the AC input terminal of the motor. At least a portion of the first output terminal 1132 extends through the first lead-out hole 1112 into the external environment of the housing 111 for direct electrical connection with the AC input terminal of the motor.

[0088] In some embodiments, the first AC connector 113 further includes a first body (not shown), which is connected between the first input terminal 1131 and the first output terminal 1132. A portion of the first output terminal 1132 extends through the first lead-out hole 1112 into the external environment of the housing 111, while the other portion of the first output terminal 1132, the first body, and the first input terminal 1131 are all housed within the first cavity 1111. As an example, the first AC connector 113 may also include a first insulator 1133, which covers the first body to insulate the first body from other components. Of course, in other embodiments, the first output terminal 1132 may also extend entirely through the first lead-out hole 1112 into the external environment of the housing 111, while the first body and the first input terminal 1131 are all housed within the first cavity 1111.

[0089] The motor controller 11 provided in this application embodiment extends the first output terminal 1132 of the first AC connector 113 through the first lead-out hole 1112 into the external environment of the housing 111. This allows the first output terminal 1132 to be directly electrically connected to the motor without the need for wiring harnesses, adapters, or other components to connect the first output terminal 1132 to the motor. This effectively reduces the number of components in the electric drive device 10 and shortens the current transmission path between the motor controller 11 and the motor, thereby effectively reducing stray inductance and lead inductance generated during current transmission and effectively improving the performance of the electric drive device 10 using the aforementioned motor controller 11.

[0090] In some embodiments of this application, please refer to FIG9, the first outlet hole 1112 is opened at the bottom of the housing 111.

[0091] The bottom of the housing 111 refers to the part of the housing 111 located below the first power module 112 in the height direction of the motor controller 11. The first lead-out hole 1112 can penetrate through the bottom of the housing 111 along the height direction of the motor controller 11 to connect the first cavity 1111 and the external environment of the housing 111.

[0092] By adopting the above technical solution, it is convenient to extend the first output terminal 1132 into the external environment of the housing 111 and electrically connect it to the motor, which further shortens the current transmission path between the motor controller 11 and the motor, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device 10 using the above motor controller 11.

[0093] In some embodiments of this application, please refer to FIG9. The motor controller 11 further includes a first seal 118, and the first output terminal 1132 is sealed to the first lead-out hole 1112 through the first seal 118.

[0094] The first seal 118 is a component used to seal the gap between the first output terminal 1132 and the wall of the first lead-out hole 1112. The outer peripheral contour shape of the first seal 118 can be adapted to the shape of the first lead-out hole 1112. For example, the outer peripheral contour shape of the first seal 118 and the shape of the first lead-out hole 1112 are both square. The first seal 118 can be made of a flexible material, which can be, but is not limited to, rubber, silicone, etc.

[0095] In some embodiments, a first seal 118 is provided at the port of the first outlet hole 1112, the first seal 118 has a first through hole, and the first output terminal 1132 passes through the first through hole and the first outlet hole 1112 to extend to the external environment of the housing 111.

[0096] In other embodiments, the first seal 118 abuts against the wall between the first output terminal 1132 and the first lead-out hole 1112, and the first seal 118 is disposed around the first output terminal 1132.

[0097] By adopting the above technical solution, the sealing performance of the motor controller 11 is effectively improved.

[0098] In some embodiments of this application, please refer to Figures 4 to 9 together. The housing 111 is also provided with a second lead-out hole 1113. The first cavity 1111 is also connected to the external environment of the housing 111 through the second lead-out hole 1113. The motor controller 11 also includes a second power module 114 and a second AC connector 115. The second power module 114 is housed in the first cavity 1111. The second AC connector 115 includes a second input terminal 1151 and a second output terminal 1152. The second input terminal 1151 is electrically connected to the second power module 114. The second output terminal 1152 extends from the first cavity 1111 through the second lead-out hole 1113 to the external environment of the housing 111. The first output terminal 1132 is used to directly connect to one motor, and the second output terminal 1152 is used to directly connect to another motor.

[0099] The second outlet hole 1113 penetrates the wall of the housing 111 to connect the first cavity 1111 with the external environment of the housing 111. The second outlet hole 1113 can be opened on any wall of the housing 111. For example, the second outlet hole 1113 is opened on the bottom wall of the housing 111, or on the side wall of the housing 111.

[0100] The second power module 114 is used to convert the DC current output by the battery 20 into AC current. The second power module 114 can be, but is not limited to, a silicon carbide power module, an IGBT (Insulated Gate Bipolar Transistor) power module, etc.

[0101] In some embodiments, the drive module is electrically connected between the main control module and the first power module 112 and between the main control module and the second power module 114. The drive module is used to convert the logic signal output by the main control module into voltage and current signals required to drive the first power module 112 and the second power module 114.

[0102] The second AC connector 115 is a component used to electrically connect the second power module 114 and the motor. The second input terminal 1151 of the second AC connector 115 is electrically connected to the AC output terminal of the second power module 114, and the second output terminal 1152 of the second AC connector 115 is electrically connected to the AC input terminal of the motor. The second AC connector 115 can be, but is not limited to, copper busbars, wires, etc. The first output terminal 1132 is used to directly electrically connect one motor, and the second output terminal 1152 is used to directly electrically connect another motor; that is, the motor connected to the first AC connector 113 and the motor connected to the second AC connector 115 are two separate and independent motors. As an example, the first input terminal 1131 of the first AC connector 113 is electrically connected to the AC output terminal of the first power module 112, and the first output terminal 1132 of the first AC connector 113 is electrically connected to the AC input terminal of the first motor 12, so as to transmit the AC current output by the first power module 112 to the first motor 12. The second input terminal 1151 of the second AC connector 115 is electrically connected to the AC output terminal of the second power module 114, and the second output terminal 1152 of the second AC connector 115 is electrically connected to the AC input terminal of the second motor 13, so as to transmit the AC current output by the second power module 114 to the second motor 13.

[0103] Direct electrical connection of the second output terminal 1152 to the motor means that there is no intermediate component between the second output terminal 1152 and the AC input terminal of the motor; instead, the second output terminal 1152 directly contacts and is connected to the AC input terminal of the motor. At least a portion of the second output terminal 1152 extends through the second lead-out hole 1113 into the external environment of the housing 111 for direct electrical connection with the AC input terminal of the motor. In some embodiments, the second AC connector 115 further includes a second body (not shown), which is connected between the second input terminal 1151 and the second output terminal 1152. A portion of the second output terminal 1152 extends through the second lead-out hole 1113 into the external environment of the housing 111, while the other portion of the second output terminal 1152, the second body, and the second input terminal 1151 are all housed within the first cavity 1111. As an example, the second AC connector 115 may also include a second insulator 1153, which covers the first body to insulate the second body from other components. Of course, in other embodiments, the second output terminal 1152 may also extend entirely through the second lead-out hole 1113 to the external environment of the housing 111, while the second body and the second input terminal 1151 are both housed in the first cavity 1111.

[0104] By adopting the above technical solution, the motor controller 11 can control two motors simultaneously without the need for wiring harnesses, adapters, or other components to electrically connect the motor controller 11 to the two motors. This further reduces the number of components in the electric drive device 10 and effectively shortens the current transmission path between the motor controller 11 and the two motors, thereby further reducing stray inductance and lead inductance generated during current transmission and further improving the performance of the electric drive device 10 using the above motor controller 11.

[0105] In some embodiments of this application, please refer to Figures 5 and 9 together. The first power module 112 and the second power module 114 are arranged side by side along a first direction, which is perpendicular to the height direction of the motor controller 11.

[0106] The first direction can be any direction perpendicular to the height direction of the motor controller 11. The first power module 112 and the second power module 114 being arranged side-by-side along the first direction means that the first power module 112 and the second power module 114 are at the same height, and the projection of the first power module 112 along the height direction of the motor controller 11 does not coincide with the projection of the second power module 114 along the height direction of the motor controller 11. For example, the first direction can be the length direction of the motor controller 11, meaning the first power module 112 and the second power module 114 are arranged side-by-side along the length direction of the motor controller 11. For example, the first direction can be the width direction of the motor controller 11, meaning the first power module 112 and the second power module 114 are arranged side-by-side along the width direction of the motor controller 11.

[0107] By adopting the above technical solution, the height of the motor controller 11 is effectively reduced, which not only makes the structure of the motor controller 11 more compact, but also further shortens the current transmission path between the motor controller 11 and the motor, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device 10 using the above motor controller 11.

[0108] In some embodiments of this application, please refer to Figures 5 and 9 together. The first AC power connector 113 is disposed on the side of the first power module 112 facing away from the second power module 114, and the second AC power connector 115 is disposed on the side of the second power module 114 facing away from the first power module 112.

[0109] In some embodiments, the first power module 112 and the second power module 114 are arranged side by side along the length of the motor controller 11, the first AC connector 113 is disposed on the side of the first power module 112 facing away from the second power module 114, and the second AC connector 115 is disposed on the side of the second power module 114 facing away from the first power module 112. That is, the first AC connector 113, the first power module 112, the second power module 114 and the second AC connector 115 are arranged sequentially along the length of the motor controller 11.

[0110] In other embodiments, the first power module 112 and the second power module 114 are arranged side by side along the width direction of the motor controller 11, the first AC connector 113 is disposed on the side of the first power module 112 facing away from the second power module 114, and the second AC connector 115 is disposed on the side of the second power module 114 facing away from the first power module 112. That is, the first AC connector 113, the first power module 112, the second power module 114 and the second AC connector 115 are arranged sequentially along the width direction of the motor controller 11.

[0111] By adopting the above technical solution, the current transmission path between the motor controller 11 and the motor is further shortened, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device 10 using the above motor controller 11.

[0112] In some embodiments of this application, please refer to FIG9, the second outlet hole 1113 is opened at the bottom of the housing 111.

[0113] The second outlet hole 1113 can penetrate the bottom of the housing 111 along the height direction of the motor controller 11 to connect the first cavity 1111 and the external environment of the housing 111.

[0114] In some embodiments, the first power module 112 and the second power module 114 are arranged side by side along a first direction. A first AC connector 113 is disposed on the side of the first power module 112 facing away from the second power module 114, and a second AC connector 115 is disposed on the side of the second power module 114 facing away from the first power module 112. A first lead-out hole 1112 is formed at the bottom of the housing 111 and located on the side of the first power module 112 facing away from the second power module 114. A second lead-out hole 1113 is formed at the bottom of the housing 111 and located on the side of the second power module 114 facing away from the first power module 112. A first input terminal 1131 extends along the first direction and is electrically connected to the AC output terminal of the first power module 112, and a first output terminal 1132 extends along the height direction of the motor controller 11 and is electrically connected to the AC input terminal of the first motor 12. The second input terminal 1151 extends along the first direction and is electrically connected to the AC output terminal of the second power module 114, and the second output terminal 1152 extends along the height direction of the motor controller 11 and is electrically connected to the AC input terminal of the second motor 13.

[0115] By adopting the above technical solution, it is convenient to extend the second output terminal 1152 into the external environment of the housing 111 and electrically connect it to the motor, which further shortens the current transmission path between the motor controller 11 and the motor, thereby further reducing stray inductance and lead inductance generated during current transmission, and further improving the performance of the electric drive device 10 using the above motor controller 11.

[0116] In some embodiments of this application, please refer to FIG9. The motor controller 11 further includes a second seal 119, and the second output terminal 1152 is sealed to the second lead-out hole 1113 through the second seal 119.

[0117] The second seal 119 is a component used to seal the gap between the second output terminal 1152 and the wall of the second lead-out hole 1113. The outer peripheral contour shape of the second seal 119 can be adapted to the shape of the second lead-out hole 1113. For example, both the outer peripheral contour shape of the second seal 119 and the shape of the second lead-out hole 1113 are square. The second seal 119 can be made of a flexible material, which can be, but is not limited to, rubber, silicone, etc.

[0118] In some embodiments, a second seal 119 is provided at the port of the second outlet hole 1113, the second seal 119 has a second through hole, and the second output terminal 1152 passes through the second through hole and the second outlet hole 1113 to extend to the external environment of the housing 111.

[0119] In other embodiments, the second seal 119 abuts against the wall between the second output terminal 1152 and the second lead-out hole 1113, and the second seal 119 is disposed around the second output terminal 1152.

[0120] By adopting the above technical solution, the sealing performance of the motor controller 11 is effectively improved.

[0121] In some embodiments of this application, please refer to Figures 5 and 9 together. The motor controller 11 also includes a DC connector 116 disposed between the first power module 112 and the second power module 114. The DC connector 116 includes a third output terminal 1161 and a fourth output terminal 1162. The third output terminal 1161 is electrically connected to the first power module 112, and the fourth output terminal 1162 is electrically connected to the second power module 114.

[0122] The DC connector 116 is used to electrically connect the first power module 112 and the second power module 114 to provide DC current to both power modules 112 and 114. Specifically, the third output terminal 1161 of the DC connector 116 is electrically connected to the DC input terminal of the first power module 112, and the fourth output terminal 1162 of the DC connector 116 is electrically connected to the DC input terminal of the second power module 114. The DC connector 116 can be, but is not limited to, a busbar, copper busbar, or wire. As an example, the DC connector 116 is a laminated busbar.

[0123] In some embodiments, the motor controller 11 further includes a capacitor 117, which is used to smooth the DC voltage input to the motor controller 11 so that DC voltage fluctuations are kept within an allowable range. The capacitor 117 can be, but is not limited to, a film capacitor 117, an electrolytic capacitor 117, or a double-layer capacitor 117. The DC connector 116 further includes a third input terminal 1163, which is electrically connected to the capacitor 117. The DC current output from the capacitor 117 enters the DC connector 116 via the third input terminal 1163. A portion of the DC current then enters the first power module 112 via the third output terminal 1161, and another portion enters the second power module 114 via the fourth output terminal 1162. The motor controller 11 may also include an electromagnetic compatibility (EMC) filter, which is electrically connected to the capacitor 117. The DC current flows sequentially through the EMC filter, the capacitor 117, and the DC connector 116 before entering the first power module 112 and the second power module 114. EMC filters are used to reduce or eliminate the interference caused by electromagnetic waves generated during DC current transmission to the first power module 112, the second power module 114, and the capacitor 117. EMC filters can be, but are not limited to, ferrite tubes, ferrite magnetic rings, magnetic ring chokes, etc.

[0124] In some embodiments, the first power module 112 and the second power module 114 are arranged side by side along a first direction. A first AC connector 113 is disposed on the side of the first power module 112 facing away from the second power module 114, and a second AC connector 115 is disposed on the side of the second power module 114 facing away from the first power module 112. A third output terminal 1161 and a fourth output terminal 1162 are respectively disposed on opposite sides of the DC connector 116 along the first direction. The third output terminal 1161 extends along the first direction and is electrically connected to the DC input terminal of the first power module 112, and the fourth output terminal 1162 extends along the first direction and is electrically connected to the DC input terminal of the second power module 114.

[0125] As an example, the third output terminal 1161 and the fourth output terminal 1162 are respectively disposed on opposite sides of the DC connector 116 along the length direction of the motor controller 11. The third output terminal 1161 extends along the length direction of the motor controller 11 and is electrically connected to the DC input terminal of the first power module 112. The fourth output terminal 1162 extends along the length direction of the motor controller 11 and is electrically connected to the DC input terminal of the second power module 114. The third input terminal 1163 is disposed on the side of the DC connector 116 facing the capacitor 117 along the width direction of the motor controller 11. The third input terminal 1163 extends along the width direction of the motor controller 11 and is electrically connected to the capacitor 117.

[0126] As an example, the third output terminal 1161 and the fourth output terminal 1162 are respectively disposed on opposite sides of the DC connector 116 along the width direction of the motor controller 11. The third output terminal 1161 extends along the width direction of the motor controller 11 and is electrically connected to the DC input terminal of the first power module 112. The fourth output terminal 1162 extends along the width direction of the motor controller 11 and is electrically connected to the DC input terminal of the second power module 114. The third input terminal 1163 is disposed on the side of the DC connector 116 facing the capacitor 117 along the length direction of the motor controller 11. The third input terminal 1163 extends along the length direction of the motor controller 11 and is electrically connected to the capacitor 117.

[0127] By adopting the above technical solution, the first power module 112 and the second power module 114 can share a DC power connector 116, which effectively reduces the number of components in the motor controller 11, making the structure of the motor controller 11 more compact and thus effectively reducing the size of the motor controller 11.

[0128] In some embodiments of this application, please refer to Figures 5, 9, 10 and 11 together. The housing 111 is provided with a cooling channel 1114. The cooling channel 1114 includes a main channel 11141, a first branch channel 11142 and a second branch channel 11143. The first branch channel 11142 and the second branch channel 11143 are connected to the main channel 11141. The first power module 112 is disposed on the first branch channel 11142 to cool the first power module 112. The second power module 114 is disposed on the second branch channel 11143 to cool the second power module 114.

[0129] Cooling channel 1114 provides space for the flow of cooling medium. During the flow of cooling medium, it absorbs heat from the first power module 112 and the second power module 114 to cool both modules. The first power module 112 being disposed on the first branch channel 11142 means that the first power module 112 is in contact with the outer wall of the cooling channel 1114, or that the first power module 112 is in direct contact with the cooling medium; the second power module 114 being disposed on the second branch channel 11143 means that the second power module 114 can contact the outer wall of the cooling channel 1114, or that the second power module 114 is in direct contact with the cooling medium.

[0130] As an example, the first power module 112 has a plurality of first heat-conducting parts on the side facing the first branch flow channel 11142. The first heat-conducting parts are inserted into the first branch flow channel 11142 and contact the cooling medium, so that the heat of the first power module 112 is transferred to the cooling medium through the first heat-conducting parts. The first heat-conducting parts can be, but are not limited to, heat-conducting fins, heat-conducting pins, etc. The second power module 114 has a plurality of second heat-conducting parts on the side facing the second branch flow channel 11143. The second heat-conducting parts are inserted into the second branch flow channel 11143 and contact the cooling medium, so that the heat of the second power module 114 is transferred to the cooling medium through the second heat-conducting parts. The second heat-conducting parts can be, but are not limited to, heat-conducting fins, heat-conducting pins, etc.

[0131] In some embodiments, the housing 111 may have a liquid inlet connected to the main flow channel 11141. The cooling medium enters the main flow channel 11141 from the liquid inlet. After flowing through the main flow channel 11141, the cooling medium is divided into two parts: one part enters the first branch flow channel 11142 to cool the first power module 112, and the other part enters the second branch flow channel 11143 to cool the second power module 114. As an example, the motor controller 11 may also include a liquid inlet pipe, one end of which is connected to the liquid inlet, and the other end of which is connected to the liquid outlet of the liquid supply device.

[0132] In some embodiments, the housing 111 may have a first liquid outlet and a second liquid outlet. The first liquid outlet is connected to a first branch channel 11142, through which the cooling medium in the first branch channel 11142 flows out of the housing 111. The second liquid outlet is connected to a second branch channel 11143, through which the cooling medium in the second branch channel 11143 flows out of the housing 111. As an example, the first liquid outlet and the second liquid outlet are located on opposite sides of the housing 111. As an example, the motor controller 11 also includes a first liquid outlet pipe and a second liquid outlet pipe. One end of the first liquid outlet pipe is connected to the first liquid outlet, and one end of the second liquid outlet pipe is connected to the second liquid outlet. The other ends of both the first and second liquid outlet pipes are connected to the return end of the liquid supply device.

[0133] Of course, in other embodiments, the housing 111 may only have one liquid outlet, and the first branch flow channel 11142 and the second branch flow channel 11143 are both connected to the liquid outlet. The cooling medium in the first branch flow channel 11142 and the cooling medium in the second branch flow channel 11143 both flow out of the housing 111 through the liquid outlet.

[0134] The number of first branch channels 11142 can be one or more. The number of second branch channels 11143 can be one or more.

[0135] By adopting the above technical solution, the first branch flow channel 11142 and the second branch flow channel 11143 are connected in parallel. The temperature of the cooling medium entering the first branch flow channel 11142 is approximately equal to the temperature of the cooling medium entering the second branch flow channel 11143, which effectively improves the cooling effect on the first power module 112 and the second power module 114, reduces the temperature difference between the first power module 112 and the second power module 114, and thus effectively improves the performance of the motor controller 11.

[0136] In some embodiments of this application, please refer to Figures 5 and 11 together. The housing 111 has a second cavity 1115. The capacitor 117 is housed in the second cavity 1115 and disposed on the main channel 11141 to cool the capacitor 117.

[0137] A portion of the space within the internal installation environment of the motor controller 11 constitutes the aforementioned first cavity 1111, and another portion of the space within the internal installation environment of the motor controller 11 constitutes the aforementioned second cavity 1115.

[0138] In some embodiments, at least a portion of the main channel 11141 is located below the second cavity 1115 in the height direction of the motor controller 11, and the heat of the capacitor 117 can be transferred through the bottom of the second cavity 1115 to the cooling medium in the main channel 11141 to cool the capacitor 117.

[0139] By adopting the above technical solution, the cooling effect on capacitor 117 is effectively improved, thereby further enhancing the performance of motor controller 11.

[0140] In some embodiments of this application, please refer to Figures 5 and 11 together. The capacitor 117 includes a core 1171, which is encapsulated in a second cavity 1115.

[0141] The core 1171 is the core component of the capacitor 117. There can be one or more cores 1171. The core 1171 can be fixed in the second cavity 1115 using potting compound. Specifically, the core 1171 can be placed in the second cavity 1115 first, and then potting compound can be poured into the second cavity 1115. After the potting compound solidifies, the core 1171 is fixed in the second cavity 1115.

[0142] In some embodiments, the potting compound may be a thermally conductive adhesive to improve the cooling effect on the capacitor 117.

[0143] In some embodiments, the motor controller 11 may further include an insulating element disposed between the core 1171 and the cavity wall of the second cavity 1115 to insulate and separate the core 1171 from the housing 111. The insulating element may be, but is not limited to, insulating paper, insulating film, insulating board, etc.

[0144] By adopting the above technical solution, it is not necessary to set an additional outer shell on the capacitor 117. Instead, the core 1171 of the capacitor 117 can be directly encapsulated and fixed in the second cavity 1115, which further improves the cooling effect of the capacitor 117 and thus further improves the performance of the motor controller 11.

[0145] In some embodiments of this application, the flow area of ​​the first branch channel 11142 is equal to the flow area of ​​the second branch channel 11143.

[0146] The fact that the flow area of ​​the first branch channel 11142 is equal to the flow area of ​​the second branch channel 11143 means that, along the flow direction of the cooling medium, the flow rate of the cooling medium per unit area of ​​the first branch channel 11142 is equal to the flow rate of the cooling medium per unit area of ​​the second branch channel 11143.

[0147] In some embodiments, there are multiple first branch channels 11142 and multiple second branch channels 11143, and the number of first branch channels 11142 and the number of second branch channels 11143 are equal, and the flow area of ​​each first branch channel 11142 is equal to the flow area of ​​each second branch channel 11143.

[0148] By adopting the above technical solution, the temperature difference between the first power module 112 and the second power module 114 is further reduced, thereby further improving the performance of the motor controller 11.

[0149] In some embodiments of this application, please refer to Figure 5 as well, the cooling channel 1114 is disposed at the bottom of the housing 111.

[0150] By adopting the above technical solution, it is convenient to set the cooling channel 1114 on the housing 111, which effectively simplifies the structure of the housing 111.

[0151] Secondly, please refer to Figure 3 as well. This application provides an electric drive device 10, which includes a first motor 12 and a motor controller 11 as described in any of the above embodiments. The first output terminal 1132 is directly electrically connected to the first motor 12.

[0152] The electric drive device 10 provided in this application embodiment effectively improves the performance of the electric drive device 10 by employing the motor controller 11 described in any of the above embodiments.

[0153] Thirdly, please refer to Figure 3. This application provides an electric drive device 10, including a first motor 12, a second motor 13 and a motor controller 11 as described in any of the above embodiments. The first output terminal 1132 is directly electrically connected to the first motor 12, and the second output terminal 1152 is directly electrically connected to the second motor 13.

[0154] The electric drive device 10 provided in this application embodiment effectively improves the performance of the electric drive device 10 by employing the motor controller 11 described in any of the above embodiments.

[0155] Fourthly, please refer to Figure 1. This application provides an electric drive system 1, including a battery 20 and an electric drive device 10 as described in any of the above embodiments, wherein the battery 20 is electrically connected to the electric drive device 10.

[0156] The electric drive system 1 provided in this application embodiment effectively improves the performance of the electric drive system 1 by employing the electric drive device 10 described in any of the above embodiments.

[0157] Fifthly, please refer to Figure 1 as well. An embodiment of this application provides an electric device, including the electric drive system 1 described above.

[0158] The electric device provided in this application embodiment effectively improves the performance of the electric device by adopting the electric drive system 1 described in any of the above embodiments.

[0159] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A motor controller, characterized in that: include: The enclosure has a first cavity and a first outlet hole, the first cavity being connected to the external environment of the enclosure through the first outlet hole; The first power module is housed within the first cavity; The first AC connector includes a first input terminal and a first output terminal. The first input terminal is electrically connected to the first power module, and the first output terminal extends from the first cavity through the first lead-out hole to the external environment of the housing and is used for direct electrical connection to the motor.

2. The motor controller as described in claim 1, characterized in that: The first outlet hole is located at the bottom of the box.

3. The motor controller as described in claim 1, characterized in that: The motor controller further includes a first seal, and the first output terminal is sealed to the first lead-out hole through the first seal.

4. The motor controller according to any one of claims 1-3, characterized in that: The housing is also provided with a second outlet hole, and the first cavity is connected to the external environment of the housing through the second outlet hole. The motor controller also includes a second power module and a second AC connector. The second power module is housed in the first cavity. The second AC connector includes a second input terminal and a second output terminal. The second input terminal is electrically connected to the second power module. The second output terminal extends from the first cavity through the second outlet hole to the external environment of the housing. The first output terminal is used to directly electrically connect to one motor, and the second output terminal is used to directly electrically connect to another motor.

5. The motor controller as described in claim 4, characterized in that: The first power module and the second power module are arranged side by side along a first direction, which is perpendicular to the height direction of the motor controller.

6. The motor controller as described in claim 5, characterized in that: The first AC power connector is disposed on the side of the first power module facing away from the second power module, and the second AC power connector is disposed on the side of the second power module facing away from the first power module.

7. The motor controller as described in claim 4, characterized in that: The second outlet hole is located at the bottom of the housing.

8. The motor controller as described in claim 4, characterized in that: The motor controller further includes a second seal, and the second output terminal is sealed to the second lead-out hole through the second seal.

9. The motor controller as described in claim 4, characterized in that: The motor controller further includes a DC connector disposed between the first power module and the second power module. The DC connector includes a third output terminal and a fourth output terminal. The third output terminal is electrically connected to the first power module, and the fourth output terminal is electrically connected to the second power module.

10. The motor controller as described in claim 4, characterized in that: The housing is provided with cooling channels, which include a main channel, a first branch channel and a second branch channel. The first branch channel and the second branch channel are connected to the main channel. The first power module is disposed on the first branch channel to cool the first power module, and the second power module is disposed on the second branch channel to cool the second power module.

11. The motor controller as described in claim 10, characterized in that: The housing has a second cavity, and the motor controller further includes a capacitor housed in the second cavity and disposed on the main channel to cool the capacitor.

12. The motor controller as described in claim 11, characterized in that: The capacitor includes a core, which is encapsulated within the second cavity.

13. The motor controller as described in claim 10, characterized in that: The flow area of ​​the first branch channel is equal to the flow area of ​​the second branch channel.

14. The motor controller as described in claim 10, characterized in that: The cooling channel is located at the bottom of the housing.

15. An electric drive device, characterized in that: The electric drive device includes a first motor and a motor controller as described in any one of claims 1-14, wherein the first output terminal is directly electrically connected to the first motor.

16. An electric drive device, characterized in that: The electric drive device includes a first motor, a second motor, and a motor controller as described in any one of claims 4-14, wherein the first output terminal is directly electrically connected to the first motor, and the second output terminal is directly electrically connected to the second motor.

17. An electric drive system, characterized in that: The electric drive system includes a battery and an electric drive device as described in claim 15 or 16, wherein the battery is electrically connected to the electric drive device.

18. An electric device, characterized in that: The electric device includes the electric drive system as described in claim 17.

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