Driving power supply and motor control system

Abstract

The utility model relates to the technical field of power electronics, and discloses a driving power supply module and a motor control system. The driving power supply module comprises a main control unit used for providing an upper bridge driving power supply control signal and a lower bridge driving power supply control signal; the bridge arm power supply control unit is connected with the main control unit and comprises an upper bridge control unit and a lower bridge control unit, the upper bridge control unit is controlled by an upper bridge driving power supply control signal, and the lower bridge control unit is controlled by a lower bridge driving power supply control signal; and the driving power supply circuit is connected with the upper bridge control unit and the lower bridge control unit and outputs a corresponding driving power supply signal under the condition that the upper bridge control unit and the lower bridge control unit are conducted. The problem that the working state of an existing driving power supply is uncontrollable is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, and particularly relates to a driving power supply and a motor control system. BACKGROUND

[0002] With the continuous development of automobile technology, especially the new energy vehicles of intelligent driving, the power of these vehicles is mainly provided by high-voltage power supply driving motors. Therefore, the controllability of the motor driving is extremely important.

[0003] At present, the driving of the motor is mainly realized by controlling the opening and closing of each power device in the full-bridge circuit through the driving chip, and the driving chip and the driving power supply in the full-bridge circuit are shared, and exist when the whole vehicle is powered on. Therefore, such power-on control mode makes the working state uncontrollable, thereby leading to the difficulty in realizing high-level safety control when the system fails. CONTENT OF THE INVENTION

[0004] In view of this, the present application provides a driving power supply and a motor control system to solve the uncontrollable working state of the existing driving power supply.

[0005] The first aspect of the present application provides a driving power supply module, comprising: a main control unit for providing an upper bridge driving power supply control signal and a lower bridge driving power supply control signal; a bridge arm power supply control unit connected with the main control unit, comprising an upper bridge control unit and a lower bridge control unit, wherein the upper bridge control unit is controlled by the upper bridge driving power supply control signal, and the lower bridge control unit is controlled by the lower bridge driving power supply control signal; and a driving power supply circuit connected with the upper bridge control unit and the lower bridge control unit, which outputs a corresponding driving power supply signal when the upper bridge control unit and the lower bridge control unit are turned on.

[0006] In a feasible implementation, the upper bridge control unit comprises at least one first power switch circuit, the control end of the first power switch circuit is connected with the first output end of the main control unit, the input end of the first power switch circuit is connected with the driving power supply circuit, and the output end of the first power switch circuit is connected with the ground end.

[0007] In a feasible implementation, the lower bridge control unit comprises at least one second power switch circuit, the control end of the second power switch circuit is connected with the second output end of the main control unit, the input end of the second power switch circuit is connected with the driving power supply circuit, and the output end of the second power switch circuit is connected with the ground end.

[0008] In an embodiment, the driving power supply circuit comprises at least one first transformer and at least one second transformer; one end of the primary winding of the first transformer is connected to the input end of the first power switch circuit, the other end of the primary winding of the first transformer is connected to the low-voltage power supply, and the secondary winding of the first transformer outputs an upper bridge driving power supply signal; one end of the primary winding of the second transformer is connected to the input end of the second power switch circuit, the other end of the primary winding of the second transformer is connected to the low-voltage power supply, and the secondary winding of the second transformer outputs a lower bridge driving power supply signal.

[0009] In an embodiment, the driving power supply circuit further comprises a protection circuit, a rectifier circuit and a filter circuit; the protection circuit is arranged between the low-voltage power supply and the primary winding, the rectifier circuit is connected in series with the secondary winding, and the filter circuit is connected in parallel between the two output ends of the secondary winding.

[0010] In an embodiment, the first transformer and the second transformer are single-input multi-output transformers or double-input double-output transformers.

[0011] In an embodiment, when the first transformer and the second transformer are single-input multi-output transformers, the upper bridge control unit comprises one first power switch circuit and the lower bridge control unit comprises one second power switch circuit; the primary winding of the first transformer is connected in series with the first power switch circuit, and the primary winding of the second transformer is connected in series with the second power switch circuit.

[0012] In an embodiment, when the first transformer and the second transformer are double-input double-output transformers, the upper bridge control unit comprises two first power switch circuits and the lower bridge control unit comprises two second power switch circuits; one of the two first power switch circuits is connected to the first connection end of the primary winding of the first transformer, the other is connected to the third connection end of the primary winding of the first transformer, and the second connection end of the primary winding of the first transformer is connected to the low-voltage power supply; one of the two second power switch circuits is connected to the first connection end of the primary winding of the second transformer, the other is connected to the third connection end of the primary winding of the second transformer, and the second connection end of the primary winding of the second transformer is connected to the low-voltage power supply; wherein the first connection end, the second connection end and the third connection end correspond to the upper part, the middle part and the lower part of the primary winding, respectively.

[0013] The second aspect of the present application provides a motor control system, comprising at least one driving power module provided in the above, at least one power driving device and at least one motor, the driving power module is connected with the power driving device, and driving power signal is provided for the power driving device, the motor is connected with the power driving device, wherein the at least one driving power module shares a main control unit.

[0014] In an available embodiment, the power driving device comprises a driving chip and a bridge circuit; the output ends of the driving power circuit of the driving power module are connected with the power supply ends of the driving chip and the bridge circuit respectively, so as to provide working power for the driving chip and the bridge circuit; the control end of the driving chip is connected with the main control unit, and the output end of the driving chip is connected with the control end of the bridge circuit.

[0015] In an available embodiment, the motor control system further comprises a fault processing circuit, which is arranged in the main control unit and the power driving device, and is used for collecting the driving fault signal of the power driving device.

[0016] In the technical scheme provided by the present application, the driving power module comprises: a main control unit, which is used for providing an upper bridge driving power control signal and a lower bridge driving power control signal; a bridge arm power supply control unit connected with the main control unit, which comprises an upper bridge control unit and a lower bridge control unit, the upper bridge control unit is controlled by the upper bridge driving power control signal, and the lower bridge control unit is controlled by the lower bridge driving power control signal; and a driving power circuit connected with the upper bridge control unit and the lower bridge control unit, which outputs corresponding driving power signals under the condition that the upper bridge control unit and the lower bridge control unit are turned on. Compared with the related art, the present application can realize the individual control of the driving power circuit, that is, the controllable working state of the driving power circuit, and provide effective and higher-level safety control for subsequent faults. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The first schematic diagram of the driving power module provided by the embodiment of the present application;

[0018] Figure 2 The second schematic diagram of the driving power module provided by the embodiment of the present application;

[0019] Figure 3 The third schematic diagram of the driving power module provided by the embodiment of the present application;

[0020] Figure 4 The fourth schematic diagram of the driving power module provided by the embodiment of the present application;

[0021] Figure 5 The circuit schematic diagram of the upper bridge part provided for the embodiment of the present application is shown in the following figure:

[0022] Figure 6 The circuit schematic diagram of the lower bridge part provided for the embodiment of the present application is shown in the following figure:

[0023] Figure 7 The circuit board structure schematic diagram of the driving power module of the double three-phase motor provided for the embodiment of the present application is shown in the following figure:

[0024] Figure 8 The schematic diagram of the motor control system provided for the embodiment of the present application is shown in the following figure:

[0025] Figure 9 The schematic diagram of the motor control system provided for the embodiment of the present application is shown in the following figure. DETAILED DESCRIPTION

[0026] The present application provides a driving power module and a motor control system, mainly by setting a main control unit, an upper bridge control unit and a lower bridge control unit to control the turn-on and turn-off of the upper bridge driving power supply and the lower bridge driving power supply in the driving power circuit, to realize the control of the driving power state and the driving voltage, and to solve the problem of uncontrollable driving power state in the prior art.

[0027] Further, a separate driving power circuit is set for each phase line to solve the problem of crossing of the driving power lines of each phase line, and to realize the discrete setting of the driving power of each phase line; at the same time, such structure setting can also avoid the problem of electromagnetic compatibility.

[0028] The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present application and in the above-described drawings (if any) are used to distinguish similar objects, and do not necessarily have to be used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein, for example, can be implemented in an order other than that illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such process, method, product or device.

[0029] As Figure 1As shown in the illustration, this application provides a drive power module, which includes a main control unit 110, a bridge arm power supply control unit 120, and a drive power circuit 130. The output terminal of the main control unit 110 is connected to the control terminal of the bridge arm power supply control unit 120, and the output terminal of the bridge arm power supply control unit 120 is connected to the drive power circuit 130. The main control unit 110 outputs a control signal corresponding to the bridge arm to control the on and off of the bridge arm power supply control unit 120. Under the control of the on or off of the bridge arm power supply control unit 120, the drive power circuit 130 outputs a drive power signal to provide voltage to the corresponding bridge arm.

[0030] It should be noted that the main control unit 110 can provide two control signals, namely the upper bridge drive power control signal and the lower bridge drive power control signal; the bridge arm power supply control unit 120 includes an upper bridge control unit 121 and a lower bridge control unit 122, which are connected in parallel. The upper bridge control unit 121 and the lower bridge control unit 122 are respectively connected to one of the output terminals of the main control unit 110. The main control unit 110 can control the upper bridge control unit 121 and the lower bridge control unit 122 individually by outputting the corresponding control signal to control their conduction or shutdown, thereby realizing the output of the corresponding drive power signal by the drive power circuit 130.

[0031] In practical applications, the upper bridge control unit 121 and the lower bridge control unit 122 may output one signal or two signals. Regardless of whether it is one signal or two signals, they are used to control the charging and discharging of the drive power supply circuit 130 to realize the output of the drive power supply signal.

[0032] The drive power supply circuit 130 is specifically a transformer circuit. The charging and discharging of the transformer circuit is controlled by the upper bridge control unit 121 and the lower bridge control unit 122, thereby outputting a drive power signal.

[0033] In this embodiment, the upper bridge control unit 121 includes at least one first power switch circuit. The control terminal of the first power switch circuit is connected to the first output terminal of the main control unit 110, the input terminal of the first power switch circuit is connected to the drive power supply circuit 130, and the output terminal of the first power switch circuit is connected to ground.

[0034] The lower bridge control unit 122 includes at least one second power switch circuit. The control terminal of the second power switch circuit is connected to the second output terminal of the main control unit 110. The input terminal of the second power switch circuit is connected to the drive power supply circuit 130. The output terminal of the second power switch circuit is connected to ground.

[0035] It can be understood that the number of the first and second power switch circuits is actually related to the number of bridge arms of the bridge circuit of the load, for example, a three-phase motor, which corresponds to six drive tubes to form a three-phase full-bridge circuit, and then one power switch circuit and one drive power supply circuit 130 can be arranged for each drive tube. The first power switch circuit is arranged for the upper bridge drive tube, and the second power switch circuit is arranged for the lower bridge drive tube. That is, three first power switch circuits and three second power switch circuits are arranged.

[0036] Of course, in order to reduce the number of devices in the circuit structure, the upper bridge and the lower bridge can be divided into two parts, that is, one first power switch circuit is arranged for each of the three upper bridge drive tubes, and one second power switch circuit is arranged for each of the three lower bridge drive tubes.

[0037] It should be noted that the first and second power switch circuits are designed using MOS tubes, as shown in Figure 2 The first and second power switch circuits each include one MOS tube, two resistors and a capacitor. The capacitor and one resistor are connected in parallel between the gate and the source of the MOS tube, and the other resistor is connected in series between the gate and the main control unit 110. The logic of the MOS tube in the first power switch circuit is connected to the drive power supply circuit 130, and the drain of the MOS tube in the second power switch circuit is connected to the drive power supply circuit 130. Specifically, the drive power supply circuit 130 includes an upper bridge drive power supply circuit 130a and a lower bridge drive power supply circuit 130b. The logic of the MOS tube in the first power switch circuit is connected to the upper bridge drive power supply circuit 130a, and the drain of the MOS tube in the second power switch circuit is connected to the lower bridge drive power supply circuit 130b.

[0038] In a feasible implementation, as shown in Figure 3 The drive power supply circuit 130 includes at least one first transformer 131 and at least one second transformer 132.

[0039] One end of the primary winding of the first transformer 131 is connected to the input end of the first power switch circuit, the other end of the primary winding of the first transformer 131 is connected to a low-voltage power supply, and the secondary winding of the first transformer 131 outputs an upper bridge drive power supply signal.

[0040] One end of the primary winding of the second transformer 132 is connected to the input end of the second power switch circuit, the other end of the primary winding of the second transformer 132 is connected to a low-voltage power supply, and the secondary winding of the second transformer 132 outputs a lower bridge drive power supply signal.

[0041] It should be noted that the at least one first transformer 131 is an upper bridge output driving power supply for the load, and the at least one second transformer 132 is a lower bridge output driving power supply for the load. The number of the first transformer 131 and the second transformer 132 can be determined according to actual needs, and can be one or multiple. When one is set, the first transformer 131 and the second transformer 132 should be a single-input multiple-output transformer. When multiple are set, a multiple-input multiple-output transformer (such as a double-input double-output transformer) or a single-input single-output transformer should be selected. By setting multiple transformers to correspond to the driving power supply of the driving tube of the upper and lower bridges, the driving power supply of each phase line is realized without crossing, and the electromagnetic compatibility problem is avoided.

[0042] In an embodiment, the driving power supply circuit 130 further comprises a protection circuit 133, a rectifier circuit 134 and a filter circuit 135. The protection circuit 133 is arranged between the low-voltage power supply and the primary winding of the transformer, the rectifier circuit 134 is connected in series with the secondary winding, and the filter circuit 135 is connected in parallel between the two output terminals of the secondary winding, as shown in Figure 3

[0043] In this embodiment, when the first transformer 131 and the second transformer 132 are both single-input multiple-output transformers, the upper bridge control unit 121 comprises a first power switch circuit, and the lower bridge control unit 122 comprises a second power switch circuit. The primary winding of the first transformer 131 is connected in series with the first power switch circuit, and the primary winding of the second transformer 132 is connected in series with the second power switch circuit. As shown in Figure 4 For example, the first power switch circuit in the figure is composed of a first MOS tube and a first resistor, and the first transformer 131 has one primary winding and three secondary windings. The gate of the first MOS tube in the figure is connected to the first output terminal of the main control unit 110, the source of the first MOS tube is grounded, the gate of the first MOS tube is connected to one end of the primary winding of the first transformer 131, the other end of the primary winding is connected to the low-voltage power supply, and each secondary winding of the first transformer 131 is connected to a driving tube on a phase line. In operation, the first MOS tube is turned on under the action of the upper bridge driving power supply control signal of the main control unit 110, and the first transformer 131 outputs three driving power supply signals. Similarly, the structure and connection relationship of the second power switch circuit and the first transformer 132 for the lower bridge are the same as those of the first power switch circuit and the first transformer 131, which will not be repeated here.

[0044] ​Optionally, if the first transformer 131 and the second transformer 132 are both double-input double-output transformers, the upper bridge control unit 121 includes two first power switch circuits and the lower bridge control unit 122 includes two second power switch circuits.

[0045] One of the two first power switch circuits is connected to the first connection end of the primary winding of the first transformer 131, and the other is connected to the third connection end of the primary winding of the first transformer 131. The second connection end of the primary winding of the first transformer 131 is connected to a low-voltage power supply.

[0046] One of the two second power switch circuits is connected to the first connection end of the primary winding of the second transformer 132, and the other is connected to the third connection end of the primary winding of the second transformer 132. The second connection end of the primary winding of the second transformer 132 is connected to a low-voltage power supply.

[0047] Wherein, the first connection end, the second connection end and the third connection end correspond to the upper, middle and lower positions of the primary winding respectively.

[0048] As shown in Figure 5 and 6 , the circuit structure of the two first power switch circuits is the same as that of the first power switch circuit in Figure 4 , except that the drive power signals controlled by the two first power switch circuits here are opposite to each other. As shown in Figure 5 , the upper bridge drive power supply part includes three first transformers 131, each corresponding to an upper bridge drive tube of a phase line. The first transformer 131 here has two primary windings and two secondary windings. The two primary windings are connected in series, and the middle connection point is connected to a low-voltage power supply. The two ends are respectively connected to the drain of the MOS tube in a first power switch circuit. The two secondary windings are connected in series, and the middle connection point is connected to ground. The two ends are respectively connected to the corresponding drive tube. The conduction of the two first power switch circuits controls the charging and discharging of the first transformer 131, so as to provide the drive power signal for the drive tube.

[0049] Figure 5The upper bridge driving power supply part in the driving power supply module is shown in FIG. 1. The three phases of the upper bridge correspond to three first transformers 131, which are T1, T2 and T3, respectively. The driving power supply circuit 130 of the U, V, W three-phase line corresponds to T1, T2 and T3, respectively. The first power switch circuit corresponds to the circuit of MOS tubes Q1 and Q2. The low-voltage power supply is connected to the middle pin of the primary winding of the transformer T1, T2 and T3 through resistors R1, R2 and R3, respectively. The resistors R1, R2 and R3 are actually protection circuits 133, which can be implemented by selecting PTC type protection resistors to achieve overcurrent and short circuit protection of the low-voltage power supply, the output driving power supply and the MOS tube. The upper pin of the primary winding of T1, T2 and T3 is connected to one end (drain) of Q1, and the lower pin of the primary winding of T1, T2 and T3 is connected to one end (drain) of Q2. The gate of Q1 is connected to R7, R8 and C1, and the gate of Q2 is connected to R9, R10 and C2. The resistors and capacitors are the gate peripheral circuits of Q1 and Q2, which can be selected or cancelled according to the needs.

[0050] In the working state, the upper bridge driving power supply control signals M1_HS2 and M1_HS1 output by the main control unit 110 control the turn-on and turn-off of Q1 and Q2, respectively, to realize the energy storage and conversion of the primary coils of T1, T2 and T3. The high-voltage side of the first transformer 131, i.e. the output side (secondary winding), such as T1, outputs a positive voltage M1_UH15 after being rectified by a diode D1 and filtered by a capacitor C5, which is generally 15-18V. It outputs a negative voltage M1_UH8 after being rectified by a diode D2 and filtered by a capacitor C6, which is generally 0V to -9V. M1_UHGND is the ground of the U-phase upper bridge driving power supply of the motor. The positive and negative voltages and related parameters are selected according to the needs and controlled by the main control unit 110. The driving power supply operation process and principle of the V-phase upper bridge and the W-phase upper bridge of the motor are the same. Similarly, the driving power supply of the lower bridge of the motor (i.e. the circuit of Figure 6 is the same as that of the upper bridge, which will not be repeated here.

[0051] In another possible implementation, the control units and driving power supply circuits of the same phase lines in the driving power supply module are arranged side by side in the same area of the circuit board. It can be understood that when the first power switch circuit in the upper bridge control unit 121 and the first transformer in the driving power supply circuit belong to the same phase line, they are arranged side by side on the circuit board.

[0052] That is, the circuit structure design of the driving power supply module is to arrange the driving power supply of the driving tubes of each phase line side by side, such as Figure 7As shown, one large driving power supply is divided into six driving power supplies for each phase according to modules, and is arranged nearby, that is, the U-phase upper bridge driving power supply (i.e. the first transformer) is arranged nearby the U-phase upper bridge driving circuit (i.e. the first power switch circuit), the V-phase upper bridge driving power supply (i.e. the first transformer) is arranged nearby the V-phase upper bridge driving circuit (i.e. the first power switch circuit), the W-phase upper bridge driving power supply (i.e. the first transformer) is arranged nearby the W-phase upper bridge driving circuit (i.e. the first power switch circuit), the U-phase lower bridge driving power supply (i.e. the second transformer) is arranged nearby the U-phase lower bridge driving circuit (i.e. the second power switch circuit), the V-phase lower bridge driving power supply (i.e. the second transformer) is arranged nearby the V-phase lower bridge driving circuit (i.e. the second power switch circuit), and the W-phase lower bridge driving power supply (i.e. the second transformer) is arranged nearby the W-phase lower bridge driving circuit (i.e. the second power switch circuit). The motor 2 driving system part is also the same. In this way, the overall structure of each phase driving power supply part is simple and small in size, without the need to increase additional fixing measures, with the characteristics of anti-vibration, and being able to withstand more severe vibration working conditions. The driving power supply system of each phase is arranged nearby the power driving part, and the power supply output of each bridge arm has no wiring crossing on the circuit board, with better insulation performance. The power supplies of each phase in the same driving power supply system are independent of each other and do not affect each other, so that the interference between them is small, and the overall EMC performance is good.

[0053] By implementing the embodiment, the conduction of the upper bridge control unit and the lower bridge control unit is controlled by the main control unit to control the driving power supply circuit to output the driving power supply signal. The driving power supply module structure realizes the controllability of the driving power supply, so that the output of the driving power supply can be controlled to realize safe shutdown of the motor when a fault occurs in the motor control system.

[0054] Further, the driving power supply circuit is provided with multiple transformers to output multiple driving power supply signals, so as to realize independent power supply for each driving tube in the bridge circuit. Such structure can be arranged on the circuit board and nearby, the overall structure of each phase driving power supply part is simple and small in size, with strong anti-vibration characteristics, and being able to meet more severe vibration working conditions of the whole vehicle. At the same time, there is no wiring crossing on the circuit board, so that the insulation performance is good. The output parts of the driving power supplies of each phase are independent of each other and do not affect each other, the interference between them is small, and the overall EMC performance is good.

[0055] The application also provides a motor control system, which comprises at least one driving power supply module 810 provided by the above-mentioned embodiments, at least one power driving device 820, and at least one motor 830. The driving power supply module 810 is connected with the power driving device 820 to provide a driving power supply signal for the power driving device 820, and the motor 830 is connected with the power driving device 820, as shown in Figure 8 .

[0056] It should be noted that there can be multiple motors 830 in the same system, and the main control units in multiple driving power supply modules 810 can be shared.

[0057] Optionally, the power driving device 820 comprises a driving chip and a bridge circuit; the output ends of the driving power supply circuits of the driving power supply modules 810 are connected with the power supply ends of the driving chip and the bridge circuit respectively, so as to provide working power supply for the driving chip and the bridge circuit; the control end of the driving chip is connected with the main control unit, and the output end of the driving chip is connected with the control end of the bridge circuit.

[0058] Optionally, the motor control system further comprises a fault processing circuit 840, which is arranged in the main control unit and the power driving device 820, and is used for collecting the driving fault signals of the power driving device 820.

[0059] As shown in FIG. 1, Figure 9 As shown in FIG. 1, the motor control system of two motors 830 comprises a main control unit, an upper bridge control unit of motor 1, a lower bridge control unit of motor 1, a driving power supply circuit of motor 1, a power driving device of motor 1, a fault processing circuit of motor 1, motor 1, an upper bridge control unit of motor 2, a lower bridge control unit of motor 2, a driving power supply circuit of motor 2, a power driving device of motor 2, a fault processing circuit of motor 2 and motor 2.

[0060] The main control unit, the upper bridge control unit of motor 1, the lower bridge control unit of motor 1, the driving power supply circuit of motor 1, the power driving device of motor 1, the fault processing circuit of motor 1 and motor 1 constitute a control system of motor 1, wherein two output ends of the main control unit are connected with one ends of the upper bridge control unit of motor 1 and the lower bridge control unit of motor 1, the other ends of the upper bridge control unit of motor 1 and the lower bridge control unit of motor 1 are connected with one end of the driving power supply circuit of motor 1, the other end of the driving power supply circuit of motor 1 is connected with motor 1 through the power driving device of motor 1, and the fault processing circuit of motor 1 is connected with the main control unit and the power driving device of motor 1.

[0061] The main control unit, the upper bridge control unit of motor 2, the lower bridge control unit of motor 2, the driving power supply circuit of motor 2, the power driving device of motor 2, the fault processing circuit of motor 2 and motor 2 constitute a control system of motor 2, and the connection relationship is the same as that of the control system of motor 1.

[0062] The motor control system can also solve the technical problems of the driving power supply module and achieve the corresponding effective effects because it comprises the driving power supply module provided in the above embodiment.

[0063] Finally, it should be noted that the above examples are merely specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that, within the technical scope disclosed by the present application, any person skilled in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A drive power supply module characterized by comprising: include: The main control unit is used to provide upper bridge drive power control signals and lower bridge drive power control signals; The bridge arm power supply control unit connected to the main control unit includes an upper bridge control unit and a lower bridge control unit, wherein the upper bridge control unit is controlled by the upper bridge drive power control signal, and the lower bridge control unit is controlled by the lower bridge drive power control signal. The drive power supply circuit connected to the upper bridge control unit and the lower bridge control unit outputs a corresponding drive power signal when the upper bridge control unit and the lower bridge control unit are turned on.

2. The drive power module of claim 1, wherein, The upper bridge control unit includes at least one first power switch circuit. The control terminal of the first power switch circuit is connected to the first output terminal of the main control unit, the input terminal of the first power switch circuit is connected to the drive power supply circuit, and the output terminal of the first power switch circuit is connected to ground.

3. The drive power module of claim 2, wherein, The lower bridge control unit includes at least one second power switch circuit. The control terminal of the second power switch circuit is connected to the second output terminal of the main control unit, the input terminal of the second power switch circuit is connected to the drive power supply circuit, and the output terminal of the second power switch circuit is connected to ground.

4. The drive power module of claim 3, wherein, The drive power supply circuit includes at least one first transformer and at least one second transformer; One end of the primary winding of the first transformer is connected to the input terminal of the first power switch circuit, the other end of the primary winding of the first transformer is connected to a low-voltage power supply, and the secondary winding of the first transformer outputs an upper bridge drive power signal. One end of the primary winding of the second transformer is connected to the input terminal of the second power switching circuit, the other end of the primary winding of the second transformer is connected to a low-voltage power supply, and the secondary winding of the second transformer outputs a lower bridge drive power signal.

5. The drive power module of claim 4, wherein, The drive power supply circuit also includes a protection circuit, a rectifier circuit, and a filter circuit; The protection circuit is located between the low-voltage power supply and the primary winding, the rectifier circuit is connected in series with the secondary winding, and the filter circuit is connected in parallel between the two output terminals of the secondary winding.

6. The drive power module of claim 4, wherein, The first transformer and the first transformer are either single-input multi-output transformers or dual-input dual-output transformers.

7. The drive power module of claim 6, wherein, If both the first transformer and the second transformer are single-input multi-output transformers, the upper bridge control unit includes a first power switching circuit and the lower bridge control unit includes a second power switching circuit. The primary winding of the first transformer is connected in series with the first power switching circuit, and the primary winding of the second transformer is connected in series with the second power switching circuit.

8. The drive power module of claim 6, wherein, If both the first transformer and the second transformer are dual-input dual-output transformers, the upper bridge control unit includes two first power switching circuits and the lower bridge control unit includes two second power switching circuits. One of the two first power switching circuits is connected to the first connection terminal of the primary winding of the first transformer, and the other is connected to the third connection terminal of the primary winding of the first transformer. The second connection terminal of the primary winding of the first transformer is connected to a low-voltage power supply. One of the second power switch circuits is connected with the first connection end of the primary winding of the second transformer, and the other is connected with the third connection end of the primary winding of the second transformer, and the second connection end of the primary winding of the second transformer is connected with a low-voltage power supply. The first connection end, the second connection end and the third connection end correspond to the upper part, the middle part and the lower part of the primary winding respectively.

9. An electric motor control system characterized by, The motor control system comprises at least one driving power module, at least one power driving device and at least one motor, the driving power module is connected with the power driving device to provide a driving power signal for the power driving device, and the at least one driving power module shares one main control unit.

10. The motor control system of claim 9, wherein, The control units and the driving power circuits of the same-phase lines in the driving power module are arranged side by side in the same area of the circuit board.

11. The motor control system of claim 10, wherein, The power driving device comprises a driving chip and a bridge circuit. The output ends of the driving power circuits of the driving power module are connected with the power supply ends of the driving chip and the bridge circuit respectively to provide working power for the driving chip and the bridge circuit. The control end of the driving chip is connected with the main control unit, and the output end of the driving chip is connected with the control end of the bridge circuit.

12. The motor control system of any one of claims 9-11, wherein, The motor control system further comprises a fault processing circuit arranged between the main control unit and the power driving device to collect a driving fault signal of the power driving device.

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