Direct current brush motor drive control system based on LIN communication

Abstract

The utility model provides a DC brush motor drive control system based on LIN communication, a control module of the control system is connected with an LIN transmit-receive module, a motor drive module and a power supply module, and the control module receives a communication instruction transmitted by an LIN bus through the LIN transmit-receive module and carries out operation processing to obtain a control signal. The control signal is transmitted to the motor driving module to drive a plurality of groups of direct-current brush motors; the LIN transceiver module is connected with the LIN interface protection module, and the LIN interface protection module is used for performing surge electrostatic protection and filtering protection on the LIN transceiver module; the motor driving module is connected with the multiple sets of direct-current brush motors through the motor interface filtering module, and the motor interface filtering module is used for conducting electromagnetic compatibility filtering. The control system provided by the utility model utilizes LIN communication and SPI communication to drive a plurality of groups of DC brush motors, thereby effectively reducing the processing pressure of the control module and the design difficulty of software codes.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control, in particular to a direct current brushed motor drive control system based on LIN communication. Background Art

[0002] As the application scope of motors becomes wider and wider, the motor industry continues to upgrade. Traditional motors are mainly classified into DC motors and AC motors according to the working power supply. DC motors have faster response speed, larger starting torque and good speed regulation performance. DC motors mainly include DC brush motors and DC brushless motors. DC brush motors are widely used in robots, automobiles, motorcycles and other fields due to their simple structure, stable performance, fast response speed and large starting torque. Especially with the development of automobile electrification and intelligence, on-board actuators have also developed from primitive mechanical control to today's electronic control. Among them, the functions of automobile window lifting, tailgate control, sunroof opening and closing, seat adjustment, etc. are basically driven by DC brush motors.

[0003] LIN (Local Interconnect Network) is a low-cost serial communication technology, which is also widely used in the automotive field to realize the control of distributed electronic systems in automobiles. LIN communication improves the flexibility of the electronic system structure, provides interoperability for nodes in the network from both hardware and software perspectives, and can foresee better electromagnetic compatibility characteristics. The drive of multiple DC brush motors inside the car is usually controlled by the LIN bus. Generally, a single DC brush motor drive module drives a group of DC brush motors. The traditional brush DC motor is driven by a complete H-bridge drive circuit. The H-bridge drive circuit is usually composed of four MOSFETs. Therefore, the microprocessor needs to occupy 4 PWM (Pulse Width Modulation) outputs to drive a group of DC brush motors. Usually, there are multiple groups of DC brush motors in the car, so the microprocessor needs to use more PWM for driving, which leads to the need for more signal lines for control signal transmission, and the processing pressure of the microprocessor will also increase accordingly. Therefore, there is an urgent need for a multi-DC brush motor drive control system to solve the problem that multiple groups of DC brush motors need to use multiple groups of PWM signals for drive control in the prior art. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a DC brush motor drive control system based on LIN communication, which effectively solves the problem in the prior art that multiple groups of DC brush motor drives need to use multiple groups of PWM signals for drive control.

[0005] The utility model provides a DC brush motor drive control system based on LIN communication, the control system comprises a control module, a LIN transceiver module, a LIN interface protection module, a power module, a motor drive module, a motor interface filter module and a plurality of groups of DC brush motors, wherein:

[0006] The control module is connected to the LIN transceiver module, the motor drive module and the power supply module. The control module receives instructions transmitted by the LIN bus through the LIN transceiver module, performs calculations and processing to obtain control signals, and transmits the control signals to the motor drive module to drive multiple groups of DC brushed motors.

[0007] The LIN transceiver module is connected to the LIN interface protection module, the LIN interface protection module is connected to the motor drive module and the power module, and the LIN interface protection module is used to perform surge electrostatic protection and filtering protection on the LIN transceiver module;

[0008] The motor drive module is connected to the plurality of groups of DC brush motors through the motor interface filter module. The motor drive module is used to receive the control signal of the control module to drive the plurality of groups of DC brush motors. The motor interface filter module is used to perform electromagnetic compatibility filtering.

[0009] Furthermore, the control module is provided with an SPI interface, and the control module and the motor driving module transmit control signals via SPI communication.

[0010] Furthermore, the LIN transceiver module adopts the SIT1021 chip.

[0011] Further, the LIN interface protection module includes a filtering unit, an anti-reverse connection unit, an anti-surge unit and an electrostatic protection unit, the filtering unit is connected to the anti-reverse connection unit, the anti-reverse connection unit is connected to the anti-surge unit, and the electrostatic protection unit is connected to the LIN transceiver module, wherein:

[0012] The filtering unit is used to perform electromagnetic compatibility filtering on the communication instructions transmitted by the LIN transceiver module;

[0013] The anti-reverse connection unit is used to perform anti-reverse connection protection on the LIN transceiver module;

[0014] The surge protection unit is used to provide surge protection for the LIN transceiver module;

[0015] The electrostatic protection unit is used to provide electrostatic protection for the LIN transceiver module.

[0016] Further, the filtering unit includes a first filter capacitor, a second filter capacitor and a first filter resistor, wherein the first end of the first filter capacitor and the first end of the second filter capacitor are connected together and grounded, the second end of the first filter capacitor is connected to the first end of the first filter resistor, the second end of the second filter capacitor is connected to the second end of the first filter resistor, and the second end of the first filter resistor is connected to the positive electrode of the power supply; the anti-reverse connection unit includes a first diode, the cathode of the first diode is connected to the first end of the first filter resistor; the anti-surge unit includes a first bidirectional transient suppression diode, the first end of the first bidirectional transient suppression diode is connected to the anode of the first diode and is commonly connected to the first port of the wiring terminal; the electrostatic protection unit includes a third filter capacitor, a fourth filter capacitor, a second filter resistor and a second bidirectional transient suppression diode, wherein the first end of the third filter capacitor and the first end of the fourth filter capacitor are connected together and grounded, the second end of the third filter capacitor is connected to the first end of the second filter resistor, the second end of the fourth filter capacitor is connected to the second end of the second filter resistor, the second end of the second filter resistor is connected to the LIN transceiver module, the first end of the second filter resistor is connected to the first end of the second bidirectional transient suppression diode and is commonly connected to the second port of the wiring terminal, the second end of the second bidirectional transient suppression diode is grounded, and the third port of the wiring terminal is grounded.

[0017] Furthermore, the power supply module adopts a low voltage dropout regulator power supply module.

[0018] Further, the motor drive module includes a motor control unit, an overcurrent detection protection unit, an overvoltage detection protection unit and an overheat detection protection unit, the motor control unit is connected to the control module, the motor control unit is connected to multiple groups of DC brushed motors through the motor interface filter module, the overcurrent detection protection unit, the overvoltage detection protection unit and the overheat detection protection unit are all connected to the motor control unit, wherein:

[0019] The motor control unit is used to receive the control signal of the control module and drive the plurality of groups of DC brushed motors according to the control signal;

[0020] The overcurrent detection protection unit is used to detect the current of the DC brush motor and perform automatic overcurrent protection;

[0021] The overvoltage detection protection unit is used to detect the voltage of the DC brushed motor and perform automatic overvoltage protection;

[0022] The overheat detection protection unit is used to detect the temperature of the DC brush motor and perform automatic overheat protection.

[0023] Further, the motor interface filter module includes a differential mode filter unit and a common mode filter unit, the differential mode filter unit is connected to the motor drive module and the common mode filter unit, and the common mode filter unit is connected to the DC brushed motor, wherein:

[0024] The differential mode filter unit is used to filter out the noise signal between the positive and negative power lines of the DC brushed motor;

[0025] The common mode filtering unit is used to filter out the noise signal between the positive and negative power lines of the DC brushed motor and the ground.

[0026] Furthermore, the number of the differential mode filter units and the common mode filter units is the same as the number of the brushed DC motors.

[0027] Further, the differential mode filtering unit includes a differential mode capacitor, and the common mode filtering unit includes a first common mode capacitor, a second common mode capacitor, a third common mode capacitor, a fourth common mode capacitor, a fifth common mode capacitor and a sixth common mode capacitor, wherein the first end of the differential mode capacitor is connected to the positive power supply of the motor driving module, the second end of the differential mode capacitor is connected to the negative power supply of the motor driving module, the first end of the differential mode capacitor is commonly connected to the first end of the first common mode capacitor and is grounded, the second end of the differential mode capacitor is commonly connected to the second end of the fourth common mode capacitor and is grounded, the first end of the first common mode capacitor, the first end of the second common mode capacitor and the first end of the third common mode capacitor are commonly connected and connected to the negative power supply of the DC brush motor, the second end of the first common mode capacitor, the second end of the second common mode capacitor and the second end of the third common mode capacitor are commonly connected to the first end of the fourth common mode capacitor, the first end of the fifth common mode capacitor and the first end of the sixth common mode capacitor and are grounded, and the second end of the fourth common mode capacitor, the second end of the fifth common mode capacitor and the second end of the sixth common mode capacitor are commonly connected and connected to the positive power supply of the DC brush motor.

[0028] The utility model provides a DC brush motor drive control system based on LIN communication, which drives multiple groups of DC brush motors by using low-cost serial communication technology, realizes LIN communication between LIN bus and control modules such as microprocessor through LIN transceiver module, and controls the DC brush motor drive module through SPI communication mode. It is unnecessary to use multiple PWM signals to control the DC brush motor drive module, which effectively reduces the processing pressure of the control module and the difficulty of software code design, thereby effectively reducing the design cost of the motor drive circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural diagram of a DC brushed motor drive control system based on LIN communication provided by an embodiment of the utility model;

[0031] Figure 2 This is a circuit diagram of a LIN interface protection module of a control system in an embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of the structure of the motor drive module of the control system in the embodiment of the utility model;

[0033] Figure 4 It is a circuit diagram of a motor interface filter module of a control system in an embodiment of the utility model. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] LIN (Local Interconnect Network) is a low-cost serial communication technology that is also widely used in the automotive field to achieve distributed electronic system control in automobiles. LIN communication improves the flexibility of the electronic system structure, provides interoperability for nodes in the network from both hardware and software perspectives, and can foresee better electromagnetic compatibility characteristics. The drive of multiple DC brush motors inside the car is usually controlled by the LIN bus. Generally, a single DC brush motor drive module drives a group of DC brush motors. Traditional brush DC motors are driven by a complete H-bridge drive circuit. The H-bridge drive circuit is usually composed of four MOSFETs. Therefore, the microprocessor needs to occupy 4 PWM (Pulse Width Modulation) outputs to drive a group of DC brush motors. Usually, there are multiple groups of DC brush motors in the car, so the microprocessor needs to use more PWM to drive, which leads to the need for more signal lines for control signal transmission, and the processing pressure of the microprocessor will also increase accordingly.

[0040] The embodiment of the utility model provides a DC brush motor drive control system based on LIN communication, which effectively solves the problem in the prior art that multiple groups of DC brush motor drives need to use multiple groups of PWM signals for drive control. Figure 1 1 is a structural diagram of a DC brushed motor drive control system based on LIN communication provided by an embodiment of the present utility model, such as Figure 1 As shown, the control system includes: a control module, a LIN transceiver module, a LIN interface protection module, a power module, a motor drive module, a motor interface filter module and three sets of DC brushed motors, wherein:

[0041] The control module is connected with the LIN transceiver module, the motor drive module and the power module. The control module receives the instruction transmitted by the LIN bus through the LIN transceiver module to perform calculation processing to obtain the control signal, and transmits the control signal to the motor drive module to drive the three groups of DC brushed motors. In the embodiment of the utility model, the control module can be one or more microprocessors such as a chip, a single-chip microcomputer, a programmable logic controller (PLC), a digital signal processor (DSP) or an ARM processor, and the control module is provided with an SPI (Serial Peripheral Interface) interface. The control module and the motor drive module transmit the control signal through SPI communication.

[0042] The LIN transceiver module is connected to the LIN interface protection module. The LIN transceiver module of the embodiment of the utility model adopts the SIT1021 chip, which is an interface chip used between the LIN protocol controller and the LIN bus, and its transmission rate is up to 20kbps. The SIT1021 chip receives the transmission data stream of the LIN protocol controller at the transmission data input end, and converts it into a LIN bus signal with an optimal slew rate and waveform shaping. The input data on the LIN bus is output to the control module from the output port of the SIT1021 chip.

[0043] The LIN interface protection module is connected to the motor drive module and the power module. The LIN interface protection module is used to provide surge and electrostatic protection and filtering protection for the LIN transceiver module. Usually, factors such as surge and static electricity in the car will damage the performance and stability of the LIN bus. Therefore, it is necessary to specifically provide surge and electrostatic protection and filtering protection for the LIN bus interface, that is, the LIN transceiver module. Figure 2 Schematic diagram of the LIN interface protection module circuit of the control system in the embodiment of the utility model. Figure 2 As shown, the LIN interface protection module includes a filtering unit, an anti-reverse connection unit, an anti-surge unit and an electrostatic protection unit, wherein:

[0044] The filtering unit includes a first filter capacitor C1, a second filter capacitor C2 and a first filter resistor R1. The first end of the first filter capacitor C1 and the first end of the second filter capacitor C2 are grounded together, the second end of the first filter capacitor C1 is connected to the first end of the first filter resistor R1, the second end of the second filter capacitor C2 is connected to the second end of the filter resistor R1, and the second end of the first filter resistor R1 is connected to the positive pole of the power supply. Thus, the first filter capacitor C1, the second filter capacitor C2 and the first filter resistor R1 constitute a π-type electromagnetic compatibility filter, which is used to perform electromagnetic compatibility filtering on the communication instructions transmitted by the LIN transceiver module.

[0045] The anti-reverse connection unit includes a diode D1, a cathode of the diode D1 is connected to a first end of the filter resistor R1, and an anode of the diode D1 is connected to a first port of the wiring terminal P1. The anti-reverse connection unit is used to provide anti-reverse connection protection for the LIN transceiver module.

[0046] The surge protection unit includes a first bidirectional transient suppression diode D2, a first end of which is connected to the anode of the diode D1 and is commonly connected to the first port of the wiring terminal P1. The surge protection unit is used to perform surge protection on the LIN transceiver module.

[0047] The electrostatic protection unit includes a third filter capacitor C3, a fourth filter capacitor C4, a second filter resistor R2, and a second bidirectional transient suppression diode D3, wherein the first end of the first filter capacitor C3 and the first end of the second filter capacitor C4 are grounded together, the second end of the first filter capacitor C3 is connected to the first end of the second filter resistor R2, the second end of the second filter capacitor C4 is connected to the second end of the second filter resistor R2, the second end of the second filter resistor R2 is connected to the LIN transceiver module, the first end of the second filter resistor R2 is connected to the first end of the second bidirectional transient suppression diode D3 and is commonly connected to the second port of the wiring terminal P1, the second end of the second bidirectional transient suppression diode D3 is grounded, and the third port of the wiring terminal P1 is grounded. Thus, the third filter capacitor C3, the fourth filter capacitor C4, and the second filter resistor R2 form a π-type filter and combine with the second bidirectional transient suppression diode D3 to filter and electrostatically protect the LIN transceiver module.

[0048] The power supply module is used to provide power to the control system. In the embodiment of the utility model, the power supply module adopts a low-dropout regulator LDO power supply module. The LDO power supply module can provide a stable output voltage, is not affected by changes in the input voltage, and has good anti-noise and anti-interference capabilities. At the same time, a linear regulator is adopted, which has lower power consumption and can quickly adjust the output voltage to adapt to load changes.

[0049] The motor drive module is used to receive the control signal of the control module to drive three sets of DC brush motors. The motor drive module is connected to the three sets of DC brush motors through the motor interface filter module. Figure 3 Schematic diagram of the motor drive module structure of the control system in the embodiment of the utility model. Figure 3As shown, the motor drive module includes a motor control unit, an overcurrent detection protection unit, an overvoltage detection protection unit, and an overheat detection protection unit, wherein the motor control unit is connected to the control module and is connected to three groups of DC brush motors through a motor interface filter module. The motor control unit integrates a motor control algorithm and is used to receive control signals from the control module and drive the three groups of DC brush motors according to the control signals. At the same time, the overcurrent detection protection unit, the overvoltage detection protection unit, and the overheat detection protection unit are all connected to the motor control unit, and are used to detect the current, voltage, and temperature of the DC brush motor, respectively, and perform automatic overcurrent, overvoltage, and overheat protection.

[0050] The motor interface filter module is arranged between the motor drive module and three groups of DC brush motors, and is used for electromagnetic compatibility filtering, including a differential mode filter unit and a common mode filter unit. The differential mode filter unit is connected to the motor drive module and the common mode filter unit, and the common mode filter unit is connected to the DC brush motor. The number of the differential mode filter unit and the common mode filter unit is the same as the number of the DC brush motors, that is, one group of DC brush motors corresponds to one differential mode filter unit and one common mode filter unit. Figure 4 Schematic diagram of the motor interface filter module circuit of the control system in the embodiment of the utility model, such as Figure 4 As shown, the differential mode filter unit includes a differential mode capacitor C5, which is used to filter out the noise signal between the positive and negative power lines of the DC brushed motor; the common mode filter unit includes a first common mode capacitor C6, a second common mode capacitor C7, a third common mode capacitor C8, a fourth common mode capacitor C9, and a fifth common mode capacitor C 10 and the sixth common mode capacitor C 11 , used to filter out the noise signal from the positive and negative power lines of the DC brushed motor to the ground. The specific connection relationship is as follows:

[0051] The first end of the differential mode capacitor C5 is connected to the positive electrode of the power supply of the motor drive module, the second end of the differential mode capacitor C5 is connected to the negative electrode of the power supply of the motor drive module, the first end of the differential mode capacitor C5 is connected to the first end of the first common mode capacitor C6 and is grounded, the second end of the differential mode capacitor C5 is connected to the second end of the fourth common mode capacitor C9 and is grounded, the first end of the first common mode capacitor C6, the first end of the second common mode capacitor C7 and the first end of the third common mode capacitor C8 are connected to the negative electrode of the DC brushed motor power supply, the second end of the first common mode capacitor C6, the second end of the second common mode capacitor C7 and the second end of the third common mode capacitor C8 are connected to the first end of the fourth common mode capacitor C9, the fifth common mode capacitor C 10 The first end of the sixth common mode capacitor C 11 The first ends of the fourth common-mode capacitor C9 and the fifth common-mode capacitor C 10 The second end of the sixth common mode capacitor C 11 The second ends are connected together and connected to the positive pole of the DC brush motor power supply.

[0052] In summary, the utility model provides a DC brush motor drive control system based on LIN communication, which drives multiple groups of DC brush motors by using low-cost serial communication technology, realizes LIN communication between LIN bus and control modules such as microprocessor through LIN transceiver module, and controls the DC brush motor drive module through SPI communication. There is no need to use multiple PWM signals to control the DC brush motor drive module, which effectively reduces the processing pressure of the control module and the difficulty of software code design, thereby effectively reducing the design cost of the motor drive circuit.

[0053] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A DC brushed motor drive control system based on LIN communication, characterized in that: The control system includes a control module, a LIN transceiver module, a LIN interface protection module, a power module, a motor drive module, a motor interface filter module and multiple groups of DC brushed motors, wherein: The control module is connected to the LIN transceiver module, the motor drive module and the power supply module. The control module receives the communication instructions transmitted by the LIN bus through the LIN transceiver module to perform calculation processing to obtain a control signal, and transmits the control signal to the motor drive module to drive multiple groups of DC brushed motors; The LIN transceiver module is connected to the LIN interface protection module, the LIN interface protection module is connected to the motor drive module and the power module, and the LIN interface protection module is used to perform surge electrostatic protection and filtering protection on the LIN transceiver module; The motor drive module is connected to the plurality of groups of DC brush motors through the motor interface filter module. The motor drive module is used to receive the control signal of the control module to drive the plurality of groups of DC brush motors. The motor interface filter module is used to perform electromagnetic compatibility filtering.

2. The DC brushed motor drive control system based on LIN communication according to claim 1 is characterized in that: The control module is provided with an SPI interface, and the control module and the motor drive module transmit control signals via SPI communication.

3. The DC brushed motor drive control system based on LIN communication according to claim 1, characterized in that: The LIN transceiver module adopts the SIT1021 chip.

4. The DC brushed motor drive control system based on LIN communication according to claim 1, characterized in that: The LIN interface protection module includes a filter unit, an anti-reverse connection unit, an anti-surge unit and an electrostatic protection unit, wherein the filter unit is connected to the anti-reverse connection unit, the anti-reverse connection unit is connected to the anti-surge unit, and the electrostatic protection unit is connected to the LIN transceiver module, wherein: The filtering unit is used to perform electromagnetic compatibility filtering on the communication instructions transmitted by the LIN transceiver module; The anti-reverse connection unit is used to perform anti-reverse connection protection on the LIN transceiver module; The surge protection unit is used to provide surge protection for the LIN transceiver module; The electrostatic protection unit is used to provide electrostatic protection for the LIN transceiver module.

5. The LIN communication-based DC brushed motor drive control system according to claim 4, characterized in that: The filtering unit includes a first filtering capacitor, a second filtering capacitor and a first filtering resistor, wherein the first end of the first filtering capacitor and the first end of the second filtering capacitor are connected together and grounded, the second end of the first filtering capacitor is connected to the first end of the first filtering resistor, the second end of the second filtering capacitor is connected to the second end of the first filtering resistor, and the second end of the first filtering resistor is connected to the positive electrode of the power supply; the anti-reverse connection unit includes a first diode, the cathode of the first diode is connected to the first end of the first filtering resistor; the anti-surge unit includes a first bidirectional transient suppression diode, the first end of the first bidirectional transient suppression diode is connected to the anode of the first diode and is connected to the first port of the wiring terminal; the electrostatic protection unit includes a third filtering capacitor, a fourth filtering capacitor, a second filtering resistor and a second bidirectional transient suppression diode, wherein the first end of the third filtering capacitor and the first end of the fourth filtering capacitor are connected together and grounded, the second end of the third filtering capacitor is connected to the first end of the second filtering resistor, the second end of the fourth filtering capacitor is connected to the second end of the second filtering resistor, the second end of the second filtering resistor is connected to the LIN transceiver module, the first end of the second filtering resistor is connected to the first end of the second bidirectional transient suppression diode and is connected to the second port of the wiring terminal, the second end of the second bidirectional transient suppression diode is grounded, and the third port of the wiring terminal is grounded.

6. The DC brushed motor drive control system based on LIN communication according to claim 1, characterized in that: The power supply module adopts a low voltage dropout regulator power supply module.

7. The DC brushed motor drive control system based on LIN communication according to claim 1, characterized in that: The motor drive module includes a motor control unit, an overcurrent detection protection unit, an overvoltage detection protection unit and an overheat detection protection unit, the motor control unit is connected to the control module, the motor control unit is connected to multiple groups of DC brushed motors through the motor interface filter module, the overcurrent detection protection unit, the overvoltage detection protection unit and the overheat detection protection unit are all connected to the motor control unit, wherein: The motor control unit is used to receive the control signal of the control module and drive the plurality of groups of DC brushed motors according to the control signal; The overcurrent detection protection unit is used to detect the current of the DC brush motor and perform automatic overcurrent protection; The overvoltage detection protection unit is used to detect the voltage of the DC brushed motor and perform automatic overvoltage protection; The overheat detection protection unit is used to detect the temperature of the DC brush motor and perform automatic overheat protection.

8. The DC brushed motor drive control system based on LIN communication according to claim 1, characterized in that: The motor interface filter module includes a differential mode filter unit and a common mode filter unit, the differential mode filter unit is connected to the motor drive module and the common mode filter unit, and the common mode filter unit is connected to the DC brushed motor, wherein: The differential mode filter unit is used to filter out the noise signal between the positive and negative power lines of the DC brushed motor; The common mode filtering unit is used to filter out the noise signal between the positive and negative power lines of the DC brushed motor and the ground.

9. The LIN communication-based DC brushed motor drive control system according to claim 8, characterized in that: The number of the differential mode filter units and the common mode filter units is the same as the number of the brushed DC motors.

10. The DC brushed motor drive control system based on LIN communication according to claim 9, characterized in that: The differential mode filtering unit includes a differential mode capacitor, and the common mode filtering unit includes a first common mode capacitor, a second common mode capacitor, a third common mode capacitor, a fourth common mode capacitor, a fifth common mode capacitor and a sixth common mode capacitor, wherein the first end of the differential mode capacitor is connected to the positive electrode of the power supply of the motor driving module, the second end of the differential mode capacitor is connected to the negative electrode of the power supply of the motor driving module, the first end of the differential mode capacitor is commonly connected to the first end of the first common mode capacitor and is grounded, the second end of the differential mode capacitor is commonly connected to the second end of the fourth common mode capacitor and is grounded, the first end of the first common mode capacitor, the first end of the second common mode capacitor and the first end of the third common mode capacitor are commonly connected and connected to the negative electrode of the DC brush motor power supply, the second end of the first common mode capacitor, the second end of the second common mode capacitor and the second end of the third common mode capacitor are commonly connected to the first end of the fourth common mode capacitor, the first end of the fifth common mode capacitor and the first end of the sixth common mode capacitor and are grounded, and the second end of the fourth common mode capacitor, the second end of the fifth common mode capacitor and the second end of the sixth common mode capacitor are commonly connected and connected to the positive electrode of the DC brush motor power supply.

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