Motor driving apparatus

Abstract

The utility model relates to motor driving equipment. The motor driving equipment comprises a box body, a main control board, a driving module and a capacitor, the main control board, the driving module and the capacitor are arranged in the cavity of the box body; the main control board is provided with an outer rotor motor control chip, the outer rotor motor control chip is electrically connected with the driving module, the capacitor is electrically connected with the driving module, and the driving module is suitable for being electrically connected with an external motor; the box body comprises a supporting cover, a bottom plate and two cover plates; the supporting cover is buckled on one side of the bottom plate; the two cover plates are arranged on the two opposite sides of the supporting cover correspondingly. The two cover plates are detachably connected with the supporting cover; a capacitor mounting groove is formed in one side of the bottom plate, and the capacitor mounting groove is matched with the capacitor; a heat dissipation water channel is arranged in a cavity of the bottom plate, a first water nozzle and a second water nozzle are arranged on the side wall of the bottom plate, and the first water nozzle is communicated with the second water nozzle through the heat dissipation water channel. The power supply is compact in overall structure, small in size, high in power density, high in anti-interference capability and high in heat dissipation capability.

Description

Technical Field

[0001] The present application relates to the field of motor control technology, and in particular to a motor drive device. Background Art

[0002] With the continuous development of battery technology and the maturity of high-power electronic and electrical technology, electricity is widely used in special equipment. In order to improve the efficiency of electricity utilization, motor drive controllers that can convert power are particularly important today. However, the existing motor drive controllers have the problem of poor heat dissipation. Due to the complex structure of the electronic devices inside the motor drive controller and the small clearance between the electronic devices, the heat dissipation of multiple electronic devices working at the same time is large. If the heat dissipation capacity of the motor drive controller is poor, it will not only shorten the service life of the motor drive controller, but also cause safety hazards.

[0003] How to enhance the heat dissipation capability of the motor drive controller and maintain a good working environment inside the motor drive controller has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] In view of this, the present application proposes a motor drive device suitable for enhancing the heat dissipation capability of a motor drive controller.

[0005] According to one aspect of the present application, a motor driving device is provided, comprising: a housing, a main control board, a driving module and a capacitor;

[0006] The main control board, drive module and capacitor are all arranged inside the cavity of the box;

[0007] The main control board is provided with an outer rotor motor control chip, the outer rotor motor control chip is electrically connected to the drive module, the capacitor is electrically connected to the drive module, and the drive module is suitable for being electrically connected to the external motor;

[0008] The box body comprises: a support cover, a bottom plate and two cover plates; the support cover is buckled on one side of the bottom plate; the two cover plates are respectively arranged on opposite sides of the support cover; the two cover plates are detachably connected to the support cover;

[0009] A capacitor mounting groove is provided on one side of the bottom plate, and the capacitor mounting groove matches the capacitor; a heat dissipation water channel is provided inside the cavity of the bottom plate, and a first water nozzle and a second water nozzle are provided on the side wall of the bottom plate, and the first water nozzle is connected with the second water nozzle through the heat dissipation water channel.

[0010] In a possible implementation, a water outlet and a water inlet are provided on the side wall of the bottom plate;

[0011] The first water nozzle penetrates the water inlet and is communicated with the heat dissipation water channel, and the second water nozzle penetrates the water outlet and is communicated with the heat dissipation water channel.

[0012] In a possible implementation, the bottom plate is provided with a waterway cover plate;

[0013] The water channel cover plate and the support cover are respectively fixed on two opposite side surfaces of the bottom plate.

[0014] In a possible implementation, the main body of the support cover is in a "Π"-shaped structure, and an open end of the "Π"-shaped structure is connected to the bottom plate.

[0015] In a possible implementation, a connecting portion is provided on the side wall of the bottom plate; and the support cover is detachably connected to the bottom plate via the connecting portion.

[0016] In a possible implementation, the driving module includes: a power inverter and a driving board;

[0017] The output end of the outer rotor motor control chip is electrically connected to the input end of the drive board; the output end of the drive board is electrically connected to the input end of the power inverter;

[0018] The output end of the capacitor is electrically connected to the input end of the power inverter, and the output end of the power inverter is electrically connected to the external motor.

[0019] In a possible implementation, an aviation connector is provided on the side wall of the box;

[0020] There are more than two aviation connectors, and the more than two aviation connectors are located on one of the cover plates.

[0021] In a possible implementation, the two or more aviation connectors include: a debugging aviation plug connector, a rotary transformer aviation connector, a DC power aviation connector, and a three-phase aviation connector;

[0022] The output end of the debugging aviation plug connector and the output end of the rotating transformer aviation connector are electrically connected to the input end of the external rotor motor control chip; the output end of the DC power supply aviation connector is electrically connected to the input end of the capacitor; and the output end of the drive module is electrically connected to the three-phase aviation connector.

[0023] In a possible implementation, the device further includes: a shielding plate;

[0024] The shielding plate is arranged between the driving module and the main control board.

[0025] In a possible implementation, the device further includes: a support rod;

[0026] The support rod is arranged between the shielding plate and the bottom plate.

[0027] Beneficial effect: The coolant enters the heat dissipation water channel from the first water nozzle and flows out of the heat dissipation water channel from the second water nozzle, forming a coolant circulation. The present application adopts a water cooling method to cool the power devices near the heat dissipation water channel, so that the heat generated by the power devices flows out of the box with the coolant to ensure the normal operation of the equipment. The overall structure of the present application is compact and small in size, with high power density, strong anti-interference ability, strong heat dissipation ability, and few connecting harnesses, which greatly reduces the space occupied by the product.

[0028] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 An exploded view of a motor drive device according to an embodiment of the present application is shown;

[0031] Figure 2 A main structure diagram of a motor drive device according to an embodiment of the present application is shown;

[0032] Figure 3 A system schematic diagram of a motor drive device according to an embodiment of the present application is shown.

[0033] Box body 100, bottom plate 200, support cover 300, main control board 400, drive module 500, shielding plate 600, capacitor 700, current transformer 800, DC power supply aviation connector 110, rotary transformer aviation connector 120, debugging aviation plug connector 130, three-phase aviation connector 140, first water nozzle 150, second water nozzle 160, fixing part 170, water inlet 180, water outlet 190, first cover plate 310, second cover plate 320, support rod 610, power board 410, three-phase copper busbar 900, connecting part 210, capacitor mounting groove 710. DETAILED DESCRIPTION

[0034] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0035] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0038] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0039] Figure 1 An exploded view of a motor drive device according to an embodiment of the present application is shown; Figure 2 A main structure diagram of a motor drive device according to an embodiment of the present application is shown. Figure 3 FIG. 2 shows a system schematic diagram of a motor drive device according to an embodiment of the present application. Figure 1As shown, the motor drive device comprises: a box 100, a main control board 400, a drive module 500 and a capacitor 700; the main control board 400, the drive module 500 and the capacitor 700 are all arranged inside the cavity of the box 100; the main control board 400 is provided with an outer rotor motor control chip, the outer rotor motor control chip is electrically connected to the drive module 500, the capacitor 700 is electrically connected to the drive module 500, and the drive module 500 is suitable for being electrically connected to an external motor; the box 100 comprises: a support A support cover 300, a bottom plate 200 and two cover plates; the support cover 300 is buckled on one side of the bottom plate 200; the two cover plates are respectively arranged on opposite sides of the support cover 300; the two cover plates are detachably connected to the side walls of the support cover 300; a capacitor mounting groove 710 is provided on one side of the bottom plate 200, and the capacitor mounting groove 710 matches the capacitor 700; a first water nozzle 150 and a second water nozzle 160 are provided on the side wall of the bottom plate 200, and the first water nozzle 150 is connected to the second water nozzle 160 through a heat dissipation water channel.

[0040] Here, it should be noted that the box 100 is suitable for sealing electronic components such as the main control board 400, the drive module 500, and the capacitor 700, so that they are arranged in order in the box 100, and the external power supply is isolated, etc., which can effectively prevent the interference signal from being inserted. The box 100 is composed of a support cover 300, two cover plates and a bottom plate 200, and the two cover plates and the support cover 300 are detachably connected to the bottom plate 200, which is convenient for timely maintenance of the internal components of the motor drive device. The output end of the bus interface is electrically connected to the outer rotor motor control chip, and the bus is used to transmit the upper control signal to the outer rotor motor control chip, and the output end of the outer rotor motor control chip is electrically connected to the input end of the drive module 500; the outer rotor motor control chip receives and sends the control signal sent from the upper layer, and processes the upper signal, and then outputs the control signal to the drive module 500, and the drive module 500 drives the external motor to work through the drive signal of the outer rotor motor control chip. The capacitor mounting slot 710 is suitable for placing the capacitor 700 to improve the fixed stability of the capacitor 700. The coolant enters the heat dissipation channel from the first nozzle 150 and flows out of the heat dissipation channel from the second nozzle 160, forming a coolant circulation. The present application adopts a water cooling method to cool the power devices near the heat dissipation channel, so that the heat generated by the power devices flows out of the box 100 with the coolant to ensure the normal operation of the equipment. The overall structure of the present application is compact and small in size, high in power density, strong in anti-interference ability, strong in heat dissipation ability, and less in connection harnesses, which greatly reduces the space occupied by the product.

[0041] In a possible implementation, the side wall of the bottom plate 200 is provided with a water outlet 190 and a water inlet 180; the first water nozzle 150 penetrates the water inlet 180 and is connected to the heat dissipation water channel, and the second water nozzle 160 penetrates the water outlet 190 and is connected to the heat dissipation water channel. The water inlet 180 is provided with a first water nozzle 150, and the water outlet 190 is provided with a second water nozzle 160. The first water nozzle 150 and the second water nozzle 160 are both hollow cylindrical structures. The water inlet 180 and the water outlet 190 are both circular hole-shaped structures, and the inner wall of the hole is provided with a threaded structure. The first water nozzle 150 matches the water inlet 180, and the second water nozzle 160 matches the water outlet 190. The first water nozzle 150 and the second water nozzle 160 are both fixed to the water inlet 180 and the water outlet 190 of the box body 100 by threads, and their main function is to connect the cooling water circuit to provide heat dissipation and water cooling for this application.

[0042] In a possible implementation, the main body of the bottom plate 200 is a rectangular plate-shaped structure, and a rectangular trough structure is provided in the middle of the bottom surface of the bottom plate 200 to form a hollow cavity, so that the heat dissipation water channel is arranged inside the cavity of the bottom plate 200, and the heat dissipation water channel is connected to the external water tank through the water inlet 180 and the water outlet 190 on the side wall of the bottom plate 200, so as to form a cooling cycle. The coolant enters the water inlet, and the coolant enters the heat dissipation water channel, flows in the heat dissipation water channel to take away the heat of the nearby power devices, and then flows out through the water outlet 190, thereby forming a cooling cycle. Further, three baffles are arranged parallel to each other on the side walls of the rectangular trough structure of the bottom plate 200 to form an "S"-shaped heat dissipation water channel. The coolant is circulated in an "S" shape to ensure that the coolant circulates fully inside the cavity of the bottom plate 200, shorten the circulation speed of the coolant, so that the coolant can better remove heat from the bottom plate 200, and improve the heat dissipation efficiency.

[0043] In a possible implementation, the heat dissipation water channel is provided with a water channel cover plate 350; the water channel cover plate 350 and the support cover 300 are respectively fixed on two opposite sides of the bottom plate 200. The shape of the water channel cover plate 350 is the same as the shape of the opening of the rectangular trough structure. The water channel cover plate 350 covers the rectangular trough structure on the bottom surface of the bottom plate 200. After the bottom plate 200 and the water channel cover plate 350 are connected, they jointly form a sealed space for the circulation of coolant to ensure the entry and exit of the coolant and heat dissipation. Furthermore, the water channel cover plate 350 is fixed to the bottom of the bottom plate 200 by welding to improve the sealing of the heat dissipation water channel and prevent the loss of coolant.

[0044] A water tank and a water pump are provided outside. Under the action of the water pump, the coolant in the water tank can enter the box body 100 and realize the cooling cycle process. A radiator is provided outside the box body 100 to cool the coolant flowing out of the water outlet 190. Furthermore, the coolant adopts ethylene glycol type coolant.

[0045] In a possible implementation, the main body of the support cover 300 is a "Π"-shaped structure, and the open end of the "Π"-shaped structure is connected to the bottom plate 200. Figure 1 As shown, the open end of the support cover 300 is buckled on the bottom plate 200, and the interior of the support cover 300 is suitable for placing electronic devices.

[0046] In a possible implementation, the two cover plates are respectively a first cover plate 310 and a second cover plate 320; the first cover plate 310 and the second cover plate 320 are respectively covered on two side surfaces of the support cover 300, and the first cover plate 310 and the second cover plate 320 cover two side walls of the bottom plate 200; the first cover plate 310 is provided with a water inlet hole and a water outlet hole for making way for the water inlet 180 and the water outlet 190, the water inlet hole corresponds to the water inlet 180 of the bottom plate 200, and the water outlet hole corresponds to the water outlet 190 of the bottom plate 200, a plurality of bolt holes are provided at the edges of the first cover plate 310 and the second cover plate 320, and bolt holes are provided at both end surfaces of the support cover 300. The first cover plate 310 and the second cover plate 320 are connected to the corresponding support cover 300 and the bottom plate 200 by bolts.

[0047] In a possible implementation, a connecting portion 210 is provided on the side wall of the bottom plate 200; the support cover 300 is detachably connected to the bottom plate 200 via the connecting portion 210. Figure 1 As shown, a plurality of bolt holes are provided on the connecting portion 210, and corresponding bolt holes are provided on both sides of the "Π"-shaped structure of the support cover 300. When the support cover 300 is installed on the base plate 200, the two sides of the "Π"-shaped structure of the support cover 300 cover the connecting portions 210 on both sides of the base plate 200, and the support cover 300 and the connecting portion 210 are fixed and locked by a plurality of bolts to achieve the fixing stability of the support cover 300.

[0048] In a possible implementation, the bottom plate 200 is provided with a capacitor installation groove 710; the capacitor installation groove 710 is arranged adjacent to the heat dissipation water channel; and the capacitor 700 matches the capacitor installation groove 710. The capacitor installation groove 710 is provided on the top surface of the bottom plate 200. Since the capacitor 700 is relatively large in size, the capacitor 700 is installed in the capacitor installation groove 710, which effectively ensures the installation stability of the capacitor 700.

[0049] In a possible implementation, the drive module includes: a power inverter and a drive board; the output end of the outer rotor motor control chip is electrically connected to the input end of the drive board; the output end of the drive board is electrically connected to the input end of the power inverter; the output end of the capacitor 700 is electrically connected to the input end of the power inverter, and the output end of the power inverter is electrically connected to the external motor. Here, it should be noted that the outer rotor motor control chip is connected to the bus to receive the signal of the upper controller, and the drive signal is output to the drive board via the electrical connection between the main control board 400 and the drive board; the capacitor 700 is suitable for inputting a DC voltage to the power inverter, and the power inverter is suitable for converting the DC power into the AC power required by the drive motor and driving the external motor to work. Further, the output end of the power inverter is connected to the external motor through an aviation connector.

[0050] Furthermore, the output end of the outer rotor motor control chip is electrically connected to the input end of the driver board through a twisted pair, and the output end of the driver board is electrically connected to the input end of the power inverter through a twisted pair. Using a twisted pair as a conductor for electrical connection has high reliability and is easy to use. At the same time, it can improve the anti-interference ability between electronic components and effectively suppress common-mode interference.

[0051] In a possible implementation, the power inverter uses an IGBT power device, which has higher voltage and current handling capabilities.

[0052] In a possible implementation, capacitor 700 uses a film capacitor 700 in a DC support capacitor; one pole of the DC support capacitor is electrically connected to the power inverter of the drive module through a twisted pair, and the other pole of the DC support capacitor is connected to 540V DC through a fastening bolt. It should be noted that capacitor 700 has the function of filtering and stabilizing the circuit. Capacitor 700 is located beside the heat dissipation water channel and at the bottom of the cavity of the box 100. The film capacitor 700 has a large capacity, good stability, small size, and small parasitic parameters, which can effectively improve the regularity of the interior of the box 100.

[0053] In a possible implementation, the side wall of the box 100 is provided with an aviation connector; there are more than two aviation connectors, and the more than two aviation connectors are located on one of the cover plates. Figure 1As shown, the aviation connector is arranged on the first cover plate 310. The aviation connector facilitates the electrical connection between the electronic components inside the box 100 and the electronic components outside the box 100, and facilitates the connection or disconnection between circuits. Furthermore, the first cover plate 310 is provided with aviation connector holes of different sizes, which are suitable for placing the aviation connector. The aviation connector is inserted into the aviation connector hole. The two ends of the aviation connector are respectively located on the inner and outer sides of the box. Bolts are used to fix the aviation connector to the outer wall of the box for reinforcement. The aviation connector is sealed with sealant. The aviation connector can not only reduce the interference effect of external interference signals on the electronic components inside the box, but also arrange the wires inside the box in an orderly manner.

[0054] In a possible implementation, the two or more aviation connectors include: a debugging aviation plug connector 130, a rotating transformer aviation connector 120, a DC power supply aviation connector 110, and a three-phase aviation connector 140; the output end of the debugging aviation plug connector 130 and the output end of the rotating transformer aviation connector 120 are both electrically connected to the input end of the outer rotor motor control chip, suitable for receiving external signals and transmitting them to the outer rotor motor control chip; the output end of the DC power supply aviation connector 110 is electrically connected to the input end of the capacitor 700, suitable for providing a 540V DC voltage to the capacitor 700; the output end of the drive module is electrically connected to the three-phase aviation connector 140, and the power inverter converts the DC power transmitted from the capacitor 700 into AC power and outputs it to the three-phase aviation connector 140, and the three-phase aviation connector 140 is electrically connected to the stator core of the external motor to realize the output of the drive signal.

[0055] In a possible implementation, it also includes a detection processing module; the detection processing module is electrically connected to the outer rotor motor control chip. It should be noted that the detection processing module includes: a position signal processing circuit, a temperature signal processing circuit, a bus voltage detection circuit, a current signal processing circuit, and a debugging interface circuit; each detection processing circuit is electrically connected to the outer rotor motor control chip, and receives external signals through their respective interfaces, and transmits the processed signals to the outer rotor motor control chip.

[0056] Specifically, the input end of the rotary transformer aviation connector 120 is electrically connected to the external position sensor through a twisted pair, and the output end of the rotary transformer aviation connector 120 is electrically connected to the outer rotor motor control chip through a twisted pair to form a position signal processing circuit. The position signal processing circuit receives and processes the position sensor signal of the external motor through the aviation connector, and transmits the signal of the position sensor to the outer rotor motor control chip. The input end of the rotary transformer aviation connector 120 is also electrically connected to the external temperature sensor through a twisted pair, and the output end of the rotary transformer aviation connector 120 is electrically connected to the outer rotor motor control chip of the main control board 400 through a twisted pair to form a temperature signal processing circuit. The temperature signal processing circuit receives and processes the temperature sensor signal of the external motor through the rotary transformer aviation connector 120, and transmits the signal of the temperature sensor to the outer rotor motor control chip. The input end of the bus interface is electrically connected to the upper control for data exchange, the output end of the bus interface is electrically connected to the input end of the debugging aviation plug connector 130, and the output end of the debugging aviation plug connector 130 is electrically connected to the outer rotor motor control chip to form an upper controller signal processing circuit. The debugging interface circuit and other circuits receive external signals through the debugging aviation plug connector 130 and transmit them to the outer rotor motor control chip.

[0057] Here, it should be noted that the position signal processing circuit is suitable for detecting the position parameters of the external motor, the temperature signal processing circuit is suitable for detecting the temperature parameters of the power inverter and the external motor, the debugging interface circuit is suitable for debugging the motor controller working program, and other circuits include: PWM wave control circuit, etc.

[0058] In a possible implementation, it also includes: a voltage acquisition board and a current transformer 800; one end of the voltage acquisition board is electrically connected to the main control board 400 through a twisted pair, and the other end of the voltage acquisition board is electrically connected to the three-phase aviation connector 140 through a twisted pair; the current transformer passes through the three-phase copper bar 900 and is fixed on one side of the drive module 500, one end of the current transformer 800 is electrically connected to the main control board 400 through a twisted pair, and the other end of the current transformer 800 is electrically connected to the DC power supply aviation connector 110 through the three-phase copper plate 900. Further, the current signal processing circuit receives the input current signal through the current transformer 800 and transmits it to the outer rotor motor control chip; the bus voltage detection circuit receives the output voltage signal through the voltage acquisition board and transmits it to the outer rotor motor control chip.

[0059] In a possible implementation, it also includes: a shielding plate 600; the shielding plate 600 is located between the main control board 400 and the driving module 500. The main control board 400 is placed on the shielding plate 600 for fixing; the driving module 500 is located below the shielding plate 600 and above the heat dissipation channel. The shielding plate 600 is provided with an opening, and the twisted pair between the main control board 400 and the driving module 500 passes through the opening; the surface of the shielding plate 600 is covered with an insulating sticker. Here, it should be noted that the shielding plate 600 plays a supporting role, and at the same time effectively isolates strong and weak electricity, achieves the effect of anti-electromagnetic interference, and improves the operating stability of the equipment. There are four support rods 610. One end of the four support rods 610 is respectively located at the four corners of the shielding plate 600, and the other end of the support rod 610 is fixedly connected to the bottom plate 200. The support rod 610 is suitable for supporting the shielding plate 600, and the shielding plate 600 is suitable for placing the main control board 400 and physically isolating the main control board 400 from the driving module 500 to reduce signal interference.

[0060] In a possible implementation, it also includes: a pad, which is arranged in a pad groove, and the pad groove and the capacitor installation groove 710 are respectively located on both sides of the heat dissipation water channel, and the pad is suitable for supporting the driving module 500 and the current transformer 800.

[0061] In a possible implementation, a fixing portion 170 is provided on the outside of the box 100; the fixing portion 170 is provided with a shock absorbing device. Here, it should be noted that the fixing portion 170 is suitable for installation and fixing of the box, and further the fixing portion 170 is a fixing through hole, and there are four fixing through holes, which are respectively protruded at the four corners of the bottom of the box 100, and each fixing through hole is provided with a shock absorbing steel sleeve and a shock absorbing pad, which is suitable for stable installation of the box and reducing the impact of vibration on the motor drive controller. One of the shock absorbing devices is provided with a grounding plate, which can effectively prevent interference signals from affecting the signals of this application.

[0062] In a possible implementation, it also includes: a power board 410, which is located on the shielding board 600 and is provided with power by a 24V input from a general aviation connector, and is converted into stable 24V, 15V, and 5V by the power board 410. Among them, 15V and 5V are provided to the main control board 400 as a stable low-voltage power supply through twisted pair electrical connection, and 24V is provided to the voltage collection board as a stable low-voltage power supply through twisted pair electrical connection.

[0063] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A motor drive device, characterized in that: include: Box, main control board, drive module and capacitor; The main control board, the driving module and the capacitor are all arranged inside the cavity of the box; The main control board is provided with an outer rotor motor control chip, the outer rotor motor control chip is electrically connected to the drive module, the capacitor is electrically connected to the drive module, and the drive module is suitable for being electrically connected to an external motor; The box body comprises: a support cover, a bottom plate and two cover plates; the support cover is buckled on one side of the bottom plate; the two cover plates are respectively arranged on opposite sides of the support cover; the two cover plates are detachably connected to the support cover; A capacitor mounting groove is provided on one side of the bottom plate, and the capacitor mounting groove matches the capacitor; a heat dissipation water channel is provided inside the cavity of the bottom plate, and a first water nozzle and a second water nozzle are provided on the side wall of the bottom plate, and the first water nozzle is connected to the second water nozzle through the heat dissipation water channel.

2. The motor drive device according to claim 1, characterized in that: The side wall of the bottom plate is provided with a water outlet and a water inlet; The first water nozzle passes through the water inlet and is communicated with the heat dissipation water channel, and the second water nozzle passes through the water outlet and is communicated with the heat dissipation water channel.

3. The motor drive device according to claim 1, characterized in that: The bottom plate is provided with a waterway cover plate; The water channel cover plate and the support cover are respectively fixed on two opposite side surfaces of the bottom plate.

4. The motor drive device according to claim 1, characterized in that: The main body of the support cover is in a "Π"-shaped structure, and the open end of the "Π"-shaped structure is connected to the base plate.

5. The motor drive device according to claim 4, characterized in that: The side wall of the bottom plate is provided with a connecting portion; the support cover is detachably connected to the bottom plate via the connecting portion.

6. The motor drive device according to claim 1, characterized in that: The driving module includes: a power inverter and a driving board; The output end of the outer rotor motor control chip is electrically connected to the input end of the driving board; the output end of the driving board is electrically connected to the input end of the power inverter; The output end of the capacitor is electrically connected to the input end of the power inverter, and the output end of the power inverter is electrically connected to the external motor.

7. The motor drive device according to claim 6, characterized in that: The side wall of the box is provided with an aviation connector; There are more than two aviation connectors, and the more than two aviation connectors are located on one of the cover plates.

8. The motor drive device according to claim 7, characterized in that: The two or more aviation connectors include: a debugging aviation plug connector, a rotary transformer aviation connector, a DC power supply aviation connector, and a three-phase aviation connector; The output end of the debugging aviation plug connector and the output end of the rotating transformer aviation connector are both electrically connected to the input end of the outer rotor motor control chip; the output end of the DC power supply aviation connector is electrically connected to the input end of the capacitor; and the output end of the drive module is electrically connected to the three-phase aviation connector.

9. The motor drive device according to claim 1, characterized in that: Also includes: Shielding plate; The shielding plate is arranged between the driving module and the main control board.

10. The motor drive device according to claim 9, characterized in that: Also includes: Support rods; The support rod is arranged between the shielding plate and the bottom plate.

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