Motor drive equipment and motor operation systems

Abstract

The motor drive device and motor operation system provided in this application relate to the field of circuit layout technology. The motor drive device includes a circuit board and a motor drive circuit. The circuit board includes a first area and a second area. The motor drive circuit includes: a bridge inverter unit disposed in the first area, the AC end of the bridge inverter unit being electrically connected to the motor to be driven to provide AC power to the motor; and a drive unit disposed in the second area, the output end of the drive unit being electrically connected to the control end of the bridge inverter unit to provide a drive voltage to the bridge inverter unit. Based on the above arrangement, the problem of unreasonable distribution of existing motor drive circuits on the circuit board can be improved.

Description

Technical Field

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

[0002] To effectively drive a motor, a corresponding motor drive circuit is typically provided. To facilitate the placement of the various components included in the motor drive circuit, the motor drive circuit is typically integrated onto a circuit board. However, the inventors have discovered that, in the prior art, the motor drive circuit suffers from an unreasonable distribution on the circuit board. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a motor drive device and a motor operation system to improve the problem of unreasonable distribution of existing motor drive circuits on a circuit board.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] A motor drive device includes a circuit board and a motor drive circuit, wherein the circuit board includes a first area and a second area, and the motor drive circuit includes:

[0006] a bridge inverter unit disposed in the first area, wherein an AC end of the bridge inverter unit is used to be electrically connected to a motor to be driven so as to provide AC power to the motor;

[0007] The driving unit is arranged in the second area, and the output end of the driving unit is electrically connected to the control end of the bridge inverter unit, and is used to provide a driving voltage to the bridge inverter unit.

[0008] In a preferred embodiment of the present application, in the above motor drive device, the bridge inverter unit includes a multi-phase inverter sub-unit, and the output end of the inverter sub-unit of each phase serves as an AC end of one phase;

[0009] The multi-phase inverter sub-units are arranged sequentially in one direction of the first region.

[0010] In a preferred embodiment of the present application, in the above motor drive device, the inverter subunit of each phase includes:

[0011] An upper half bridge including at least one field effect transistor;

[0012] a first conductive connector electrically connected to the drain of the field effect transistor included in the upper half bridge, wherein an end of the first conductive connector away from the drain serves as a DC positive terminal of a phase inverter sub-unit;

[0013] a second conductive connector electrically connected to the source of the field effect transistor included in the upper half bridge;

[0014] a third conductive connecting member electrically connected to the second conductive connecting member;

[0015] a lower half bridge comprising at least one field effect transistor, wherein the drain of the field effect transistor included in the lower half bridge is electrically connected to the third conductive connecting member;

[0016] A fourth conductive connector is electrically connected to the source of the field effect tube included in the lower half bridge, and one end of the fourth conductive connector away from the source serves as a DC negative end of a phase inverter sub-unit.

[0017] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the upper half bridge includes a plurality of field effect transistors, and the plurality of field effect transistors are sequentially arranged in a direction perpendicular to the arrangement direction of the multi-phase inverter sub-unit;

[0018] The lower half bridge includes a plurality of field effect transistors, and the plurality of field effect transistors are sequentially arranged in a direction perpendicular to the arrangement direction of the multi-phase inverter sub-units.

[0019] In a preferred embodiment of the present application, in the motor drive device, the first conductive connector is a heat-conducting sheet-like structure, and at least a portion of the structure is located on a side of the field effect transistor included in the upper half bridge away from the circuit board;

[0020] The third conductive connecting member is a heat-conducting sheet-like structure, and at least a portion of the structure is located on a side of the field effect transistor included in the lower half bridge away from the circuit board.

[0021] In a preferred embodiment of the present application, in the motor drive device, the first conductive connector is located at least partially on a side of the field effect transistor included in the upper half bridge away from the circuit board, covering the entire area of ​​the field effect transistor away from the circuit board;

[0022] The third conductive connecting member is located at least partially on a side of the field effect transistor included in the lower half bridge away from the circuit board, and covers the entire area of ​​the field effect transistor away from the circuit board.

[0023] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the length direction of the first conductive connector is perpendicular to the setting direction of the multi-phase inverter sub-unit, and the length direction of the third conductive connector is perpendicular to the setting direction of the multi-phase inverter sub-unit.

[0024] In a preferred embodiment of the present application, in the motor drive device, the second conductive connecting member is a heat-conducting strip structure and is provided on one side of the circuit board;

[0025] The fourth conductive connecting member is a heat-conducting strip structure and is disposed on one side of the circuit board.

[0026] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the length direction of the second conductive connector is perpendicular to the setting direction of the multi-phase inverter sub-unit, and the length direction of the fourth conductive connector is perpendicular to the setting direction of the multi-phase inverter sub-unit.

[0027] In a preferred embodiment of the present application, in the above motor drive device, a dividing line between the first area and the second area is parallel to a width direction of the circuit board;

[0028] Wherein, the multi-phase inverter sub-units are arranged sequentially in the width direction of the circuit board.

[0029] In a preferred embodiment of the present application, in the above motor drive device, the bridge inverter unit further includes:

[0030] A DC bus positive electrode connector electrically connected to the DC positive terminal of each phase of the inverter sub-unit, wherein the length direction of the DC bus positive electrode connector is parallel to the arrangement direction of the multi-phase inverter sub-unit;

[0031] A DC bus negative pole connector electrically connected to the DC negative terminal of each phase of the inverter sub-unit, wherein the length direction of the DC bus negative pole connector is parallel to the arrangement direction of the multi-phase inverter sub-unit.

[0032] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the DC bus positive electrode connector and the DC bus negative electrode connector are heat-conducting strip structures.

[0033] In a preferred embodiment of the present application, in the above motor drive device, the DC bus positive electrode connector and the DC bus negative electrode connector are arranged at a position close to the second area in the first area;

[0034] The multi-phase inverter sub-unit is arranged on a side of the DC bus positive electrode connector and the DC bus negative electrode connector away from the second area.

[0035] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the motor drive circuit further includes:

[0036] A ripple suppression unit is provided in the second area, and is electrically connected to the DC bus positive connector and the DC bus negative connector, respectively, for suppressing ripple current generated in the bridge inverter unit.

[0037] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the ripple suppression unit is arranged at a position where the second area is close to the first area.

[0038] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the motor drive circuit further includes:

[0039] A control unit is provided in the second area, and its output terminal is electrically connected to the input terminal of the driving unit, for outputting a control instruction to the driving unit so that the driving unit provides a driving voltage to the bridge inverter unit based on the control instruction.

[0040] In a preferred embodiment of the present application, in the above motor drive device, the drive unit is arranged at a position where the second area is close to the first area;

[0041] The control unit is disposed on a side of the driving unit away from the first area.

[0042] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the motor drive circuit further includes:

[0043] a sampling resistor disposed in the first region, the sampling resistor being connected in series between the negative DC terminal of the bridge inverter unit and the negative electrode of a DC bus power supply, wherein the DC bus power supply is used to provide a supply voltage to the bridge inverter unit, the drive unit, and the control unit;

[0044] A differential amplifier unit is provided in the second area, wherein an input end of the differential amplifier unit is electrically connected to the sampling resistor, and an output end of the differential amplifier unit is electrically connected to an input end of the control unit, so that the control unit outputs a control instruction to the driving unit based on the current signal collected by the sampling resistor.

[0045] In a preferred embodiment of the present application, in the above-mentioned motor drive device, the DC bus power supply is arranged in the second area.

[0046] Based on the above, the embodiment of the present application further provides a motor operation system, including:

[0047] The above-mentioned motor drive device;

[0048] A motor electrically connected to the motor drive device performs power output based on the alternating current provided by the motor drive device.

[0049] The motor drive device and motor operation system provided by the present application partition a circuit board into a first area and a second area, and respectively arrange the bridge inverter unit and the drive unit included in the motor drive circuit in the first area and the second area, so that the high-power bridge inverter unit and the low-power drive unit can be arranged in zones, thereby avoiding the problem of inaccurate driving operation of the low-power drive unit due to electromagnetic interference from the high-power bridge inverter unit. In addition, because the high-power bridge inverter unit and the low-power drive unit generate different amounts of heat, different temperature zones can also be achieved, so that when heat dissipation treatment is required, a more targeted heat dissipation arrangement can be performed to ensure better heat dissipation effect. In addition, the problem of high-temperature aging of the drive unit due to the large amount of heat generated by the bridge inverter unit can be avoided, so that the drive unit can have a longer service life. In this way, the problem of unreasonable distribution of existing motor drive circuits on the circuit board can be effectively improved, making it have high practical value.

[0050] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a system block diagram of the motor operation system provided in an embodiment of the present application.

[0052] Figure 2 A schematic diagram of the structure of the motor drive device provided in an embodiment of the present application.

[0053] Figure 3 This is a circuit diagram of the bridge inverter unit provided in an embodiment of the present application.

[0054] Figure 4 A schematic diagram of the distribution of multi-phase inverter sub-units included in the bridge inverter unit provided in an embodiment of the present application on a circuit board.

[0055] Figure 5 A diagram showing the relative positional relationships between the various structures included in the inverter subunit provided in an embodiment of the present application.

[0056] Figure 6 Schematic diagram of the connection relationship between the DC bus positive connector and the DC bus negative connector and each inverter sub-unit provided in an embodiment of the present application.

[0057] Figure 7 This is a schematic diagram of another connection relationship between the DC bus positive connector and the DC bus negative connector and each inverter sub-unit provided in an embodiment of the present application.

[0058] Figure 8A schematic diagram of the relative positional relationship between the ripple suppression unit and other components provided in an embodiment of the present application.

[0059] Figure 9 A schematic diagram of the distribution of the control unit on the circuit board provided in an embodiment of the present application.

[0060] Icons: 10-motor operation system; 100-motor drive device; 110-circuit board; 111-first area; 113-second area; 130-motor drive circuit; 131-bridge inverter unit; 131a-inverter sub-unit; H1-upper half bridge; H2-lower half bridge; L1-first conductive connector; L2-second conductive connector; L3-third conductive connector; L4-fourth conductive connector; 132a-DC bus positive connector; 132b-DC bus negative connector; 132c-positive connector extension structure; 133-drive unit; 135-ripple suppression unit; 137-control unit; 200-motor. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0062] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0063] like Figure 1 As shown, an embodiment of the present application provides a motor operation system 10 , wherein the motor operation system 10 may include a motor drive device 100 and a motor 200 .

[0064] In detail, the motor drive device 100 and the motor 200 may be electrically connected, so that the motor 200 may perform power output based on the alternating current provided by the motor drive device 100 .

[0065] It should be noted that the specific application environment of the motor operating system 10, that is, the specific device driven when the motor 200 performs power output work, is not limited.

[0066] For example, in an alternative embodiment, the motor 200 can be used to drive a robotic arm of a robot or drone. That is, the robot can include the motor operating system 10 and the robotic arm, and the output shaft of the motor 200 in the motor operating system 10 can be connected to the robotic arm to drive the robotic arm.

[0067] Combine Figure 2 The present invention also provides a motor drive device 100 applicable to the motor operation system 10. The motor drive device 100 may include a circuit board 110 and a motor drive circuit 130. The circuit board 110 may include a first region 111 and a second region 113. The motor drive circuit 130 may include a bridge inverter unit 131 and a drive unit 133.

[0068] In detail, the bridge inverter unit 131 can be arranged in the first area 111, and the drive unit 133 can be arranged in the second area 113. In addition, the AC end of the bridge inverter unit 131 can be used to electrically connect to the motor 200 to be driven to provide AC power to the motor 200. The output end of the drive unit 133 can be electrically connected to the control end of the bridge inverter unit 131 to provide a driving voltage to the bridge inverter unit 131. In this way, based on the driving voltage provided by the drive unit 133, the bridge inverter unit 131 can provide corresponding AC power to the motor 200 to drive the motor 200 to perform power output.

[0069] Based on the above arrangement, the high-power bridge inverter unit 131 and the low-power drive unit 133 can be arranged in zones, thereby avoiding the problem of inaccurate driving of the low-power drive unit 133 due to electromagnetic interference from the high-power bridge inverter unit 131. In addition, since the high-power bridge inverter unit 131 and the low-power drive unit 133 generate different amounts of heat, different temperature zones can also be achieved, so that when heat dissipation treatment is required, a more targeted heat dissipation arrangement can be made to ensure better heat dissipation effect. In addition, the problem of high-temperature aging of the drive unit 133 due to the large amount of heat generated by the bridge inverter unit 131 can be avoided, so that the drive unit 133 can have a longer service life.

[0070] First, it should be noted that the specific area included in the circuit board 110 is not limited and can be selected according to actual application requirements.

[0071] For example, in an alternative example, the circuit board 110 may include only two areas, namely, the first area 111 and the second area 113 .

[0072] For another alternative example, the circuit board 110 may include other areas in addition to the first area 111 and the second area 113. Furthermore, the number and specific locations of the other areas are not limited, and may be 1, 2, 3, or 4, for example. The specific locations may be between the first area 111 and the second area 113 or elsewhere.

[0073] It is understandable that the specific manner of forming different areas on the circuit board 110 , such as forming the first area 111 and the second area 113 , is not limited.

[0074] For example, in an alternative example, the first area 111 and the second area 113 may be formed respectively based on two opposite surfaces of the circuit board 110 .

[0075] For another alternative example, the area division may be performed based on a direction perpendicular to the surface of the circuit board 110 on which the device is mounted, thereby forming a first area 111 and a second area 113. Thus, the first area 111 may include two opposing surfaces (the two surfaces being portions of the two surfaces of the circuit board 110), and the second area 113 may also include two opposing surfaces (the two surfaces being another portion of the two surfaces of the circuit board 110).

[0076] Secondly, it should be noted that for the motor driving circuit 130 , the specific structure of the driving unit 133 is not limited and can be selected according to actual application requirements.

[0077] For example, in an alternative example, corresponding driver chips, such as half-bridge driver chips, may be configured for each of the multi-phase inverter sub-units 131 a included in the bridge inverter unit 131 .

[0078] Furthermore, in the motor drive circuit 130 , the specific structure of the bridge inverter unit 131 is not limited and can be selected according to actual application requirements.

[0079] For example, combined with Figure 3 The specific number of multi-phase inverter subunits 131a (the output end of each phase inverter subunit 131a serves as a single-phase AC end and can be electrically connected to the motor 200) included in the bridge inverter unit 131 is not limited. For example, in an alternative example, the bridge inverter unit 131 can include two-phase inverter subunits 131a to output single-phase AC power. In another alternative example, the bridge inverter unit 131 can also include three-phase inverter subunits 131a to output three-phase AC power.

[0080] For another example, the specific distribution of the multi-phase inverter sub-units 131a included in the bridge inverter unit 131 in the first area 111 is also not limited. For example, in an alternative example, the multi-phase inverter sub-units 131a can be arbitrarily distributed in the first area 111. For another example, in order to make the distribution of the multi-phase inverter sub-units 131a more reasonable, such as to improve the integration level, the multi-phase inverter sub-units 131a can be arranged sequentially in one direction of the first area 111.

[0081] Optionally, for the example of setting the multi-phase inverter sub-unit 131a in sequence in one direction of the first area 111, the specific content of the direction is not restricted and can be selected according to actual application requirements, such as the relative position relationship between the first area 111 and the second area 113, the integration requirements of the multi-phase inverter sub-unit 131a, and other factors.

[0082] For example, in an alternative example, the dividing line between the first area 111 and the second area 113 is parallel to the length direction of the circuit board 110, that is, when the circuit board 110 only includes the first area 111 and the second area 113, the length of the first area 111, the length of the second area 113 and the length of the circuit board 110 are the same, and the sum of the width of the first area 111 and the width of the second area 113 is equal to the width of the circuit board 110.

[0083] Based on this, the multi-phase inverter sub-units 131 a can be arranged sequentially in the length direction of the circuit board 110 , and can also be arranged sequentially in the length direction of the first area 111 .

[0084] For another example, in another alternative example, in order to make the width of the circuit board 110 smaller, so that the motor drive device 100 can be applied to a space with a smaller width (such as a narrow and long space in a robotic arm), the dividing line between the first area 111 and the second area 113 is parallel to the width direction of the circuit board 110, that is, when the circuit board 110 only includes the first area 111 and the second area 113, the width of the first area 111, the width of the second area 113 and the width of the circuit board 110 are the same, and the sum of the length of the first area 111 and the length of the second area 113 is equal to the length of the circuit board 110.

[0085] Based on this, combined Figure 4 The multi-phase inverter sub-units 131 a can be arranged sequentially in the width direction of the circuit board 110 and also in the width direction of the first area 111 .

[0086] Specifically, in a specific application example, the bridge inverter unit 131 may include three-phase inverter subunits 131a, which may be a first inverter subunit, a second inverter subunit, and a third inverter subunit. Thus, the first inverter subunit, the second inverter subunit, and the third inverter subunit may be sequentially arranged along the width direction of the first region 111.

[0087] Optionally, for the example of sequentially arranging the multi-phase inverter subunits 131 a in one direction of the first area 111 , the specific structure of the inverter subunit 131 a of each phase is not limited and can be selected according to actual application requirements.

[0088] For example, in an alternative example, the inverter sub-unit 131a of each phase may include an upper half-bridge H1 and a lower half-bridge H2, wherein the upper half-bridge H1 may include at least one field-effect transistor, and the lower half-bridge H2 may also include at least one field-effect transistor, and then, the field-effect transistor of the upper half-bridge H1 and the field-effect transistor of the lower half-bridge H2 are electrically connected by welding pins together.

[0089] For another example, in an alternative embodiment, in order to arrange the components included in each phase of the inverter subunit 131a more reasonably, and between the components and other components or structures, electrical connections may be made through provided conductive connectors.

[0090] Based on this, combined Figure 5 The inverter sub-unit 131a of each phase may include an upper half bridge H1, a lower half bridge H2, a first conductive connection L1, a second conductive connection L2, a third conductive connection L3 and a fourth conductive connection L4.

[0091] The upper half bridge H1 may include at least one field-effect transistor (FET), and the lower half bridge H2 may also include at least one field-effect transistor (FET). Thus, the first conductive connector L1 may be electrically connected to the drain of the FET included in the upper half bridge H1, and the end of the first conductive connector L1 away from the drain may serve as the DC positive terminal of a single-phase inverter subunit 131a. The second conductive connector L2 may be electrically connected to the source of the FET included in the upper half bridge H1, and the second conductive connector L2 may be connected to the third conductive connector L3. The third conductive connector L3 may be electrically connected to the drain of the FET included in the lower half bridge H2, so that the drain may be electrically connected to the source of the FET included in the upper half bridge H1 via the second conductive connector L2 and the third conductive connector L3. The fourth conductive connection L4 can be electrically connected to the source of the field effect transistor included in the lower half bridge H2, and an end of the fourth conductive connection L4 away from the source can serve as the DC negative end of a phase inverter sub-unit 131a.

[0092] In the above example, it can be understood that the specific number of field effect transistors included in the upper half bridge H1 is not limited and can be selected according to actual application requirements.

[0093] For example, in an alternative example, the upper half bridge H1 may include one field effect transistor. For another example, in another alternative example, the upper half bridge H1 may also include multiple (two or more) field effect transistors.

[0094] Among them, when the upper half bridge H1 includes multiple field effect transistors, the multiple field effect transistors can be connected in series to improve the voltage resistance performance, or connected in parallel to improve the current resistance performance, or connected in parallel and then in series or in series and then in parallel.

[0095] In detail, in a specific application example, the plurality of field effect transistors included in the upper half bridge H1 can be connected in parallel, so that the upper half bridge H1 can be driven with high power.

[0096] Furthermore, when the upper half bridge H1 includes a plurality of field effect transistors, the specific arrangement of the plurality of field effect transistors in the first area 111 is not limited and can be selected according to actual application requirements.

[0097] For example, in an alternative example, the plurality of field effect transistors included in the upper half bridge H1 may be sequentially arranged along a direction parallel to the arrangement direction of the multi-phase inverter sub-unit 131 a.

[0098] That is, if the multi-phase inverter subunits 131a are sequentially arranged along the width direction of the circuit board 110, the multiple field effect transistors included in the upper half bridge H1 can also be sequentially arranged along the width direction of the circuit board 110. If the multi-phase inverter subunits 131a are sequentially arranged along the length direction of the circuit board 110, the multiple field effect transistors included in the upper half bridge H1 can also be sequentially arranged along the length direction of the circuit board 110.

[0099] For another alternative example, the plurality of field effect transistors included in the upper half bridge H1 may be sequentially arranged along a direction perpendicular to the arrangement direction of the multi-phase inverter sub-unit 131 a.

[0100] That is, if the multi-phase inverter subunits 131a are sequentially arranged along the width direction of the circuit board 110, in order to reduce the width of the circuit board 110, the multiple field effect transistors included in the upper half bridge H1 can also be sequentially arranged along the length direction of the circuit board 110. If the multi-phase inverter subunits 131a are sequentially arranged along the length direction of the circuit board 110, the multiple field effect transistors included in the upper half bridge H1 can also be sequentially arranged along the width direction of the circuit board 110.

[0101] Similarly, when the lower half bridge H2 includes multiple field effect transistors, the specific arrangement of the multiple field effect transistors in the first area 111 is not limited and can be selected according to actual application requirements.

[0102] For example, in an alternative example, the plurality of field effect transistors included in the lower half bridge H2 may be sequentially arranged in a direction parallel to the arrangement direction of the multi-phase inverter sub-unit 131 a.

[0103] For another alternative example, the plurality of field effect transistors included in the lower half bridge H2 may be sequentially arranged in a direction perpendicular to the arrangement direction of the multi-phase inverter sub-unit 131 a.

[0104] In the above examples, it can be understood that the specific shape, structure and arrangement of the conductive connectors are not limited and can be selected according to actual application requirements.

[0105] For example, in an alternative example, each conductive connector can be a strip-shaped structure. For another example, in another alternative example, each conductive connector can also be a sheet-shaped structure. Configuration can be made based on specific heat dissipation requirements and layout based on integration requirements.

[0106] First, for the first conductive connector L1 and the third conductive connector L3, in order to improve the heat dissipation effect of the field effect tubes included in the upper half bridge H1 and the lower half bridge H2, the first conductive connector L1 and the third conductive connector L3 can be a heat-conducting sheet structure (sheet structure, the heat dissipation area is larger, so that the heat dissipation effect is better).

[0107] In order to avoid the problem that the first conductive connector L1 and the third conductive connector L3 of the sheet structure occupy too much area of ​​the first region 111, thereby causing a decrease in integration, at least part of the structure of the first conductive connector L1 can be located on the side of the field effect transistor included in the upper half bridge H1 away from the circuit board 110; at least part of the structure of the third conductive connector L3 is located on the side of the field effect transistor included in the lower half bridge H2 away from the circuit board 110.

[0108] In this way, by spatially superimposing at least a portion of the structure of the first conductive connector L1 and the field effect transistor included in the upper half bridge H1, and spatially superimposing at least a portion of the structure of the third conductive connector L3 and the field effect transistor of the lower half bridge H2, it is possible to ensure that the heat dissipation area of ​​the first conductive connector L1 and the third conductive connector L3 can be made larger, and it is also possible to avoid the problem of occupying too large an area of ​​the first region 111 and resulting in reduced integration.

[0109] Moreover, in order to further improve the heat dissipation effect of the first conductive connector L1 and the third conductive connector L3 on the field effect transistor, the first conductive connector L1 is located at least partially in the structure of the field effect transistor included in the upper half bridge H1 on the side away from the circuit board 110, and can cover the entire area of ​​the field effect transistor on the side away from the circuit board 110; the third conductive connector L3 is located at least partially in the structure of the field effect transistor included in the lower half bridge H2 on the side away from the circuit board 110, and can cover the entire area of ​​the field effect transistor on the side away from the circuit board 110.

[0110] That is, the field effect transistors included in the upper half bridge H1 are located on a side away from the circuit board 110, and heat can be dissipated at all locations through the first conductive connector L1. The field effect transistors included in the lower half bridge H2 are located on a side away from the circuit board 110, and heat can be dissipated at all locations through the third conductive connector L3.

[0111] It can be understood that in order to enable the field effect tube to effectively dissipate heat through the first conductive connector L1 and the third conductive connector L3, the motor drive device 100 can also include a shell structure that accommodates the circuit board 110 and the motor drive circuit 130, and the first conductive connector L1 and the third conductive connector L3 can be connected to the shell structure through heat dissipation material, so that the heat generated by the field effect tube can be transmitted to the external space of the shell structure through the first conductive connector L1 or the third conductive connector L3, the heat dissipation material, and the shell structure in sequence, thereby completing the heat dissipation.

[0112] In order to make the first conductive connector L1 and the third conductive connector L3 have better electrical and thermal conductivity, the first conductive connector L1 and the third conductive connector L3 can be copper sheets, and the heat dissipation material can be thermal conductive silicone mud or thermal conductive silicone sheet.

[0113] Furthermore, it should be additionally explained that the arrangement of the first conductive connector L1 and the third conductive connector L3 in the first area 111 is not limited and can be selected according to actual application requirements.

[0114] For example, in an alternative example, the length direction of the first conductive connection L1 can be parallel to the setting direction of the multi-phase inverter subunit 131a. Similarly, the length direction of the third conductive connection L3 can also be parallel to the setting direction of the multi-phase inverter subunit 131a.

[0115] For another example, in another alternative example, in order to make the integration of the bridge inverter unit 131 in the first area 111 higher, such as avoiding the formation of a longer occupied area in one direction, the length direction of the first conductive connection L1 can be perpendicular to the setting direction of the multi-phase inverter sub-unit 131a, and the length direction of the third conductive connection L3 can also be perpendicular to the setting direction of the multi-phase inverter sub-unit 131a.

[0116] In this way, if the multi-phase inverter sub-unit 131a is arranged in sequence in the width direction of the circuit board 110, the length direction of the first conductive connector L1 can be parallel to the length direction of the circuit board 110, and the length direction of the third conductive connector L3 can also be parallel to the length direction of the circuit board 110, so that the multi-phase inverter sub-unit 131a can occupy a narrower area in the width direction of the circuit board 110, thereby making the motor drive device 100 more adaptable to narrow and long application environments.

[0117] Secondly, for the second conductive connector L2 and the fourth conductive connector L4, in order to take into account the needs of heat dissipation and improving integration, the second conductive connector L2 and the fourth conductive connector L4 can be a thermally conductive strip structure (strip structure, occupying a smaller area in the first region 111, which is convenient for integration).

[0118] Furthermore, considering that the first conductive connector L1 and the fourth conductive connector L4 are strip-shaped structures, the area occupied in the first region 111 is generally small. Therefore, the first conductive connector L1 and the fourth conductive connector L4 can be arranged on one side of the circuit board 110, that is, there is no need to form spatial overlap with other mechanisms or devices, so that the process can be simplified.

[0119] In order to ensure that the second conductive connection member L2 and the fourth conductive connection member L4 have better electrical and thermal conductivity, the second conductive connection member L2 and the fourth conductive connection member L4 may be copper bars.

[0120] Furthermore, it should be additionally explained that the second conductive connection L2 and the fourth conductive connection L4 are not restricted in their arrangement within the first region 111 and can be selected according to actual application requirements.

[0121] For example, in an alternative example, the length direction of the second conductive connection L2 can be parallel to the setting direction of the multi-phase inverter subunit 131a. Similarly, the length direction of the fourth conductive connection L4 can also be parallel to the setting direction of the multi-phase inverter subunit 131a.

[0122] For another example, in another alternative example, in order to make the integration of the bridge inverter unit 131 higher in the first area 111, such as avoiding the formation of a longer occupied area in one direction, the length direction of the second conductive connection L2 can be perpendicular to the setting direction of the multi-phase inverter sub-unit 131a, and the length direction of the fourth conductive connection L4 can also be perpendicular to the setting direction of the multi-phase inverter sub-unit 131a.

[0123] In this way, if the multi-phase inverter sub-unit 131a is arranged in sequence in the width direction of the circuit board 110, the length direction of the second conductive connector L2 can be parallel to the length direction of the circuit board 110, and the length direction of the fourth conductive connector L4 can also be parallel to the length direction of the circuit board 110, so that the multi-phase inverter sub-unit 131a can occupy a narrower area in the width direction of the circuit board 110, thereby making the motor drive device 100 more adaptable to narrow and long application environments.

[0124] Regarding the first conductive connection L1 , the second conductive connection L2 , the third conductive connection L3 and the fourth conductive connection L4 , it is understandable that the height of each conductive connection is not limited and can be selected according to actual application requirements.

[0125] For example, in an alternative embodiment, the first conductive connector L1 and the third conductive connector L3 are disposed on a side of the field effect transistor away from the circuit board 110, and the second conductive connector L2 and the fourth conductive connector L4 are disposed on a side of the circuit board 110 that bears the field effect transistor. Thus, to facilitate heat dissipation and packaging, the first conductive connector L1 and the third conductive connector L3 are of equal height, and the second conductive connector L2 and the fourth conductive connector L4 are of equal height. Furthermore, the sum of the heights of the first conductive connector L1 and the field effect transistor is greater than or equal to the height of the second conductive connector L2.

[0126] Furthermore, it should be noted that, for the bridge inverter unit 131, each of the inverter sub-units 131a described above can include a DC positive terminal and a DC negative terminal, wherein the specific electrical connection method of the DC positive terminal and the DC negative terminal to the DC bus power supply is not limited and can also be selected according to actual application requirements.

[0127] For example, in an alternative example, the DC positive terminal and the DC negative terminal of the inverter sub-unit 131a of each phase can be directly connected to the positive electrode and the negative electrode of the DC bus power supply respectively.

[0128] For example, in another alternative example, in order to facilitate the electrical connection between the inverter subunit 131a of each phase and the DC bus power supply, Figure 6 The bridge inverter unit 131 may further include a DC bus positive connector 132a (which may be connected to the positive pole of the DC bus power supply) and a DC bus negative connector 132b (which may be connected to the negative pole of the DC bus power supply).

[0129] That is, the DC bus positive connector 132a and the DC bus negative connector 132b can be disposed in the first area 111. Thus, the DC positive terminal of each phase of the inverter sub-unit 131a can be electrically connected to the DC bus positive connector 132a, and the DC negative terminal of each phase of the inverter sub-unit 131a can be electrically connected to the DC bus negative connector 132b. This allows the DC terminals of the multi-phase inverter sub-units 131a to be connected together through the DC bus positive connector 132a and the DC bus negative connector 132b, thereby electrically connecting them to the DC bus power supply.

[0130] Optionally, the specific arrangement of the DC bus positive connector 132a and the DC bus negative connector 132b in the first area 111 is not limited and can be selected according to actual application requirements.

[0131] For example, in an alternative embodiment, in the first region 111, the length directions of the DC bus positive connector 132a and the DC bus negative connector 132b may be parallel to the arrangement direction of the multi-phase inverter sub-unit 131a. In this way, the DC end of the multi-phase inverter sub-unit 131a can be conveniently connected to the DC bus positive connector 132a and the DC bus negative connector 132b, respectively.

[0132] For another alternative example, in the first area 111, the length direction of the DC bus positive connector 132a and the DC bus negative connector 132b may also be parallel to the setting direction of the multi-phase inverter subunit 131a.

[0133] Furthermore, the specific locations of the DC bus positive connector 132 a and the DC bus negative connector 132 b in the first area 111 are not limited and can be selected according to actual application requirements.

[0134] For example, in an alternative example, in order to avoid excessive impact on the devices in the second area 113 due to the high-power working state of the multi-phase inverter sub-unit 131a, the DC bus positive connector 132a and the DC bus negative connector 132b can be arranged in a position close to the second area 113 in the first area 111, and the multi-phase inverter sub-unit 131a can be arranged on the side of the DC bus positive connector 132a and the DC bus negative connector 132b away from the second area 113.

[0135] Moreover, based on the above-mentioned configuration, when the DC bus power supply is set in the second area 113 (in other examples, the DC bus power supply may also be set in the first area 111), it is also convenient to realize the electrical connection between the DC bus power supply and the DC bus positive connector 132a and the DC bus negative connector 132b, thereby avoiding the problem of reduced safety performance of the line and increased loss due to excessively long wiring.

[0136] The specific structures of the DC bus positive electrode connector 132a and the DC bus negative electrode connector 132b are not limited and can be selected according to actual application requirements.

[0137] For example, in an alternative example, the DC bus positive electrode connector 132a and the DC bus negative electrode connector 132b are heat-conducting sheet structures, so that the heat dissipation effect is more sufficient.

[0138] For another alternative example, the DC bus positive connector 132a and the DC bus negative connector 132b are heat-conducting strip structures. In this way, while taking heat dissipation into consideration, the strip structure can also reduce the area occupied by the DC bus positive connector 132a and the DC bus negative connector 132b in the first area 111, thereby achieving integration.

[0139] Similarly, in order to take into account both electrical and thermal conductivity, the DC bus positive electrode connector 132a and the DC bus negative electrode connector 132b may also be copper bars.

[0140] Moreover, in some examples, for example, in order to facilitate the electrical connection of the DC bus positive connector 132a and / or the DC bus negative connector 132b with the inverter sub-unit 131a of each phase, the DC bus positive connector 132a and / or the DC bus negative connector 132b can also be electrically connected to the inverter sub-unit 131a through a connector extension structure.

[0141] For example, in a specific application example, combined with Figure 7 The DC bus positive connector 132a can be electrically connected to the first conductive connector L1 of each phase of the inverter sub-unit 131a through different positive connector extension structures 132c.

[0142] Furthermore, in order to prevent the ripple current generated in the bridge inverter unit 131 from affecting other devices, such as preventing interference with the drive unit 133 in the second area 113, the Figure 8 The motor driving circuit 130 may further include a ripple suppression unit 135 .

[0143] In detail, the ripple suppression unit 135 may be electrically connected to the DC bus positive connector 132 a and the DC bus negative connector 132 b , respectively, to suppress the ripple current generated in the bridge inverter unit 131 .

[0144] Optionally, the specific location of the ripple suppression unit 135 is not limited and can be selected according to actual application requirements.

[0145] For example, in an alternative example, in order to prevent the heat generated by the multi-phase bridge inverter sub-unit 131a in a high-power state from affecting the performance of the ripple suppression unit 135 , the ripple suppression unit 135 may be disposed in the second area 113 .

[0146] Furthermore, the specific location of the ripple suppression unit 135 in the second area 113 is not limited and can be selected according to actual application requirements.

[0147] For example, in an alternative example, in order to facilitate the electrical connection of the ripple suppression unit 135 with the DC bus positive connector 132a and the DC bus negative connector 132b, and to ensure that the ripple suppression unit 135 has a better suppressing effect on the ripple current of the inverter sub-unit 131a, the ripple suppression unit 135 can be arranged in a position in the second area 113 close to the first area 111.

[0148] Optionally, the specific structure of the ripple suppression unit 135 is not limited and can be selected according to actual application requirements.

[0149] For example, in an alternative example, the ripple suppression unit 135 may include one or more capacitors connected in parallel. Furthermore, to improve the ripple current suppression effect of the ripple suppression unit 135, the ripple suppression unit 135 may include multiple large electrolytic capacitors (e.g., with large capacitance values) connected in parallel.

[0150] Furthermore, in order to enable the driving unit 133 to effectively drive the bridge inverter unit 131, Figure 9 The motor driving circuit 130 may further include a control unit 137 .

[0151] In detail, the output end of the control unit 137 can be electrically connected to the input end of the driving unit 133 for outputting a control instruction to the driving unit 133 so that the driving unit 133 provides a driving voltage to the bridge inverter unit 131 based on the control instruction.

[0152] Optionally, the arrangement area of ​​the control unit 137 on the circuit board 110 is not limited and can be selected according to actual application requirements.

[0153] For example, in an alternative example, the control unit 137 may be disposed in the second area 113. This can, on the one hand, avoid interference from the bridge inverter unit 131, thereby enabling accurate output of control instructions; and on the other hand, avoid the influence of heat generated by the bridge inverter unit 131, thereby extending the service life.

[0154] Furthermore, based on the above example, the specific location of the control unit 137 in the second area 113 is not limited and can be selected according to actual application requirements.

[0155] For example, in an alternative example, considering that the control unit 137 needs to perform more precise logical judgment before outputting control instructions, in order to further avoid interference caused by the bridge inverter unit 131 in a high-power working state, the control unit 137 can be set on the side of the drive unit 133 away from the first area 111.

[0156] Optionally, the specific structure of the control unit 137 is not limited and can be selected according to actual application requirements.

[0157] For example, in an alternative example, the control unit 137 may be a central processing unit (CPU).

[0158] Furthermore, in order to enable the control unit 137 to accurately issue control instructions to the driving unit 133, the motor driving circuit 130 may further include a sampling resistor and a differential amplifier unit.

[0159] Specifically, the sampling resistor can be connected in series between the negative DC terminal of the bridge inverter unit 131 and the negative terminal of the DC bus power supply (the DC bus power supply can also be used to provide a power supply voltage to the drive unit 133 and the control unit 137). The input terminal of the differential amplifier unit can be electrically connected to the sampling resistor, and the output terminal can be electrically connected to the input terminal of the control unit 137, so that the control unit 137 outputs a control instruction to the drive unit 133 based on the current signal collected by the sampling resistor.

[0160] Optionally, the specific locations of the sampling resistor and the differential amplifier unit on the circuit board 110 are not limited and can be selected according to actual application requirements.

[0161] For example, in an alternative embodiment, considering that the bridge inverter unit 131 is disposed in the first region 111, to avoid the problem of excessively long wiring, the sampling resistor can be disposed in the first region 111. On the other hand, to prevent the differential amplifier unit from being interfered with by the bridge inverter unit 131, the differential amplifier unit can be disposed in the second region 113.

[0162] In summary, the motor drive device 100 and the motor operation system 10 provided by the present application partition the circuit board 110 into a first area 111 and a second area 113, and respectively arrange the bridge inverter unit 131 and the drive unit 133 included in the motor drive circuit 130 in the first area 111 and the second area 113, so that the high-power bridge inverter unit 131 and the low-power drive unit 133 can be arranged in separate areas, thereby avoiding the problem of inaccurate driving operation of the low-power drive unit 133 due to electromagnetic interference from the high-power bridge inverter unit 131. In addition, since the heat generated by the high-power bridge inverter unit 131 and the low-power drive unit 133 is different, different temperature zones can also be achieved, so that when heat dissipation treatment is required, a more targeted heat dissipation arrangement can be performed to ensure better heat dissipation effect. In addition, the problem of high-temperature aging of the drive unit 133 due to the large heat generated by the bridge inverter unit 131 can be avoided, so that the drive unit 133 can have a longer service life. In this way, the problem of unreasonable distribution of the existing driving circuit on the circuit board 110 can be effectively improved, making it have higher practical value.

[0163] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A motor drive device, characterized in that: The circuit board includes a first area and a second area, and the motor drive circuit includes: a bridge inverter unit disposed in the first area, wherein an AC end of the bridge inverter unit is used to be electrically connected to a motor to be driven so as to provide AC power to the motor; a driving unit disposed in the second area, wherein an output terminal of the driving unit is electrically connected to a control terminal of the bridge inverter unit and is configured to provide a driving voltage to the bridge inverter unit; The bridge inverter unit includes a multi-phase inverter sub-unit configured with a corresponding driver chip; Each phase of the inverter sub-unit includes: an upper half bridge; a lower half bridge; a first conductive connector of a heat-conducting sheet structure and a third conductive connector of a heat-conducting sheet structure; The first conductive connector is electrically connected to the drain of the field effect transistor included in the upper half bridge, and an end of the first conductive connector away from the drain serves as a DC positive terminal of a phase inverter sub-unit; at least a portion of the first conductive connector located on a side of the field effect transistor included in the upper half bridge away from the circuit board covers the entire area of ​​the field effect transistor away from the circuit board; The third conductive connector is electrically connected to the drain of the field effect transistor included in the lower half bridge; at least a partial structure of the third conductive connector located on the side of the field effect transistor included in the lower half bridge away from the circuit board covers the entire area of ​​the field effect transistor away from the circuit board.

2. The motor drive device according to claim 1, wherein: The output end of each phase inverter unit serves as a phase AC end; The multi-phase inverter sub-units are arranged sequentially in one direction of the first region.

3. The motor drive device according to claim 2, wherein: Each phase of the inverter subunit further includes: a second conductive connector electrically connected to the source of the field effect transistor included in the upper half bridge; The second conductive connecting member is electrically connected to the third conductive connecting member; A fourth conductive connector is electrically connected to the source of the field effect tube included in the lower half bridge, and one end of the fourth conductive connector away from the source serves as the DC negative end of a phase inverter sub-unit.

4. The motor drive device according to claim 3, wherein: The upper half bridge includes a plurality of field effect transistors, and the plurality of field effect transistors are sequentially arranged in a direction perpendicular to the arrangement direction of the multi-phase inverter sub-units; The lower half bridge includes a plurality of field effect transistors, and the plurality of field effect transistors are sequentially arranged in a direction perpendicular to the arrangement direction of the multi-phase inverter sub-units.

5. The motor drive device according to claim 1, wherein: The length direction of the first conductive connection member is perpendicular to the arrangement direction of the multi-phase inverter sub-unit, and the length direction of the third conductive connection member is perpendicular to the arrangement direction of the multi-phase inverter sub-unit.

6. The motor drive device according to claim 3, wherein: The second conductive connecting member is a heat-conducting strip structure and is disposed on one side of the circuit board; The fourth conductive connecting member is a heat-conducting strip structure and is disposed on one side of the circuit board.

7. The motor drive device according to claim 6, wherein: The length direction of the second conductive connection member is perpendicular to the arrangement direction of the multi-phase inverter sub-unit, and the length direction of the fourth conductive connection member is perpendicular to the arrangement direction of the multi-phase inverter sub-unit.

8. The motor drive device according to claim 2, wherein: A dividing line between the first area and the second area is parallel to a width direction of the circuit board; Wherein, the multi-phase inverter sub-units are arranged sequentially in the width direction of the circuit board.

9. The motor drive device according to claim 2, wherein: The bridge inverter unit further includes: A DC bus positive electrode connector electrically connected to the DC positive terminal of each phase of the inverter sub-unit, wherein the length direction of the DC bus positive electrode connector is parallel to the arrangement direction of the multi-phase inverter sub-unit; A DC bus negative pole connector electrically connected to the DC negative terminal of each phase of the inverter sub-unit, wherein the length direction of the DC bus negative pole connector is parallel to the arrangement direction of the multi-phase inverter sub-unit.

10. The motor drive device according to claim 9, wherein: The DC bus positive electrode connector and the DC bus negative electrode connector are arranged at a position close to the second area in the first area; The multi-phase inverter sub-unit is arranged on a side of the DC bus positive electrode connector and the DC bus negative electrode connector away from the second area.

11. The motor drive device according to claim 9, wherein: The DC bus positive electrode connector and the DC bus negative electrode connector are heat-conducting strip structures.

12. The motor drive device according to claim 9, wherein: The motor drive circuit further includes: A ripple suppression unit is provided in the second area, and is electrically connected to the DC bus positive connector and the DC bus negative connector, respectively, for suppressing ripple current generated in the bridge inverter unit.

13. The motor drive device according to claim 12, wherein: The ripple suppression unit is disposed at a position of the second region close to the first region.

14. The motor drive device according to any one of claims 1 to 13, characterized in that: The motor drive circuit further includes: A control unit is provided in the second area, and its output terminal is electrically connected to the input terminal of the driving unit, for outputting a control instruction to the driving unit so that the driving unit provides a driving voltage to the bridge inverter unit based on the control instruction.

15. The motor drive device according to claim 14, wherein: The driving unit is arranged at a position in the second area close to the first area; The control unit is disposed on a side of the driving unit away from the first area.

16. The motor drive device according to claim 14, wherein: The motor drive circuit further includes: a sampling resistor disposed in the first region, the sampling resistor being connected in series between the negative DC terminal of the bridge inverter unit and the negative electrode of a DC bus power supply, wherein the DC bus power supply is used to provide a supply voltage to the bridge inverter unit, the drive unit, and the control unit; A differential amplifier unit is provided in the second area, wherein an input end of the differential amplifier unit is electrically connected to the sampling resistor, and an output end of the differential amplifier unit is electrically connected to an input end of the control unit, so that the control unit outputs a control instruction to the driving unit based on the current signal collected by the sampling resistor.

17. The motor drive device according to claim 16, wherein: The DC bus power supply is arranged in the second area.

18. A motor operation system, characterized in that: include: The motor drive device according to any one of claims 1 to 17; A motor electrically connected to the motor drive device performs power output based on the alternating current provided by the motor drive device.

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