A dual motor drive circuit

Abstract

The utility model discloses a double motor drive circuit, including power input module, control module, drive unit and output interface module, power input module provides the electric energy for control module, drive unit, control module is used for to drive unit input control signal, drive unit is used for receiving control signal, and according to control signal to output interface module input drive current, and output interface module is provided with first control end, public end and second control end, and first control end is provided with first motor between public end, and second control end is provided with second motor between public end. Realize automatic control and manual control through control module, and through drive unit control signal conversion, and output drive current to output interface module to drive motor. The three control ends that set, first control end, second control end and public end can complete to the positive and negative control of double motor, and the degree of integration is high, and control is simple, and effectively reduces the control cost of double motor.

Description

Technical Field

[0001] This utility model relates to the field of motor drive, specifically to a dual-motor drive circuit. Background Technology

[0002] With technological advancements, motors are increasingly needed for driving various applications, such as toys, smart home appliances, and automotive products. Driving a motor requires a corresponding drive circuit or module, but current technologies typically use a single drive module to drive a single motor, meaning each motor requires two control pins. When controlling two motors, at least four control pins are needed, resulting in a complex structure and high cost. To address these issues, a dual-motor drive circuit is proposed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a drive circuit that is simple in structure and can achieve four-way control of dual motors through 3 control pins.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a dual-motor drive circuit, including: a power input module, a control module, a drive unit and an output interface module;

[0005] The power input module is used to provide power to the control module and the drive unit; the control module is used to input control signals to the drive unit; the drive unit is used to receive the control signals and input drive current to the output interface module according to the control signals; the output interface module is provided with a first control terminal, a common terminal and a second control terminal; a first motor is provided between the first control terminal and the common terminal; and a second motor is provided between the second control terminal and the common terminal.

[0006] Preferably, the driving unit includes a dual H-bridge circuit module, which is turned on in a time-division manner according to the control signal received by the driving unit to control the direction of the driving current.

[0007] Furthermore, the control module includes a manual control unit and an automatic control unit.

[0008] Preferably, the power input module is further provided with a boost module, which is used to boost the electrical energy input by the power input module and send it to the control module and the drive unit.

[0009] Furthermore, the positive output terminal of the boost module is connected to the LED light through a fifth resistor.

[0010] Furthermore, the automatic control unit includes a microprocessor module and a current detection module. The current detection module is used to receive current signals from the first motor and the second motor and feed them back to the processor module. The processor module controls the power input module based on the feedback current signals.

[0011] Furthermore, the control module includes a multi-position switch, with pin 1 of the multi-position switch connected to the positive output terminal of the power input module. The microprocessor module is equipped with a first control pin, a second control pin, a third control pin, a fourth control pin, and a detection pin. The driving unit includes a first field-effect transistor (FET), a second field-effect transistor (FET), and a third field-effect transistor (FET), as well as a first field-effect chip, a second field-effect chip, and a third field-effect chip containing dual MOSFETs. The source of the second field-effect transistor is connected to the positive output terminal and a forty-second resistor. The other end of the forty-second resistor is connected to the gate of the first field-effect transistor and the collector of the sixth transistor. The drain of the second field-effect transistor is connected to pin 6 of the multi-position switch and one end of a fifteenth resistor. The other end of the fifteenth resistor is connected to one end of a fourteenth capacitor, one end of an eighteenth resistor, one end of a sixteenth capacitor, and pin 4 of the first field-effect chip. Pins 3 and 8 of the chip are connected to the first control terminal and the other end of the sixteenth capacitor. The base of the sixth transistor is connected to the first control pin through the thirteenth resistor. The base of the sixth transistor is also connected to one end of the eighth resistor and one end of the eleventh capacitor. Pin 5 of the first field-effect chip is connected to pin 1 of the multi-position switch. Pin 6 of the multi-position switch is connected to the base of the ninth transistor through the twenty-ninth resistor. A thirty-first resistor is connected between the base and emitter of the ninth transistor. The collector of the ninth transistor is connected to one end of the twenty-fifth resistor, one end of the twenty-third capacitor, and pin 2 of the first field-effect chip. The collector of the ninth transistor is also connected to pin 4 of the multi-position switch through the twenty-second resistor. The other end of the eighth resistor, the other end of the eleventh capacitor, the emitter of the sixth transistor, the other end of the fourteenth capacitor, the other end of the eighteenth resistor, and the emitter of the ninth transistor are all grounded.Pin 1 of the multi-position switch is connected to the source of the third field-effect transistor (FET). A forty-fourth resistor is placed between the source and gate of the third FET. The drain of the third FET is connected to pin 2 of the multi-position switch and one end of the seventeenth resistor. The gate of the third FET is also connected to the collector of the thirteenth transistor. The base of the thirteenth transistor is connected to the second control pin through the fourteenth resistor. The base of the thirteenth transistor is also connected to one end of the forty-seventh resistor and one end of the twelfth capacitor. The other end of the seventeenth resistor is connected to one end of the twentieth resistor, one end of the eighteenth capacitor, one end of the twelfth capacitor, and pin 4 of the third FET chip. Pins 3 and 8 of the chip are connected to the other end of the twelfth capacitor and the second control terminal. Pin 5 of the multi-position switch is connected to the collector of the seventh transistor through the twenty-fourth resistor. Pin 2 of the multi-position switch is connected to the base of the seventh transistor through the twenty-eighth resistor. A thirtieth resistor is connected between the base and emitter of the seventh transistor. The collector of the seventh transistor is connected to one end of the twenty-fifth capacitor, one end of the twenty-seventh resistor, and pin 2 of the third field-effect chip. The other end of the forty-seventh resistor, the other end of the twelfth capacitor, the emitter of the thirteenth transistor, the other end of the twentyth resistor, the other end of the eighteenth capacitor, and the emitter of the seventh transistor are all grounded.Pin 1 of the multi-position switch is also connected to the source of the first field-effect transistor and one end of the forty-first resistor. The gate of the first field-effect transistor is connected to the other end of the forty-first resistor and the collector of the fifth transistor. The drain of the first field-effect transistor is connected to pin 4 of the multi-position switch and the anode of the fifth diode. The cathode of the fifth diode is connected to one end of the sixteenth resistor. The other end of the sixteenth resistor is connected to one end of the fifteenth capacitor, one end of the nineteenth resistor, pin 4 of the second field-effect chip, and one end of the seventeenth capacitor. The other end of the seventeenth capacitor is connected to the common terminal, pins 3 and 8 of the second field-effect transistor, and pin 5 of the second field-effect chip is connected to the multi-position switch. Pin 1 is connected. The base of the fifth transistor is connected to the third control pin through the twelfth resistor. The base of the fifth transistor is connected to one end of the seventh resistor and one end of the tenth capacitor. Pin 1 of the multi-position switch is connected to the source of the fourth field-effect transistor and one end of the fourth resistor. The other end of the fourth resistor is connected to the gate of the fourth field-effect transistor and the collector of the eleventh transistor. The drain of the fourth field-effect transistor is connected to pin 5 of the multi-position switch and the anode of the sixth diode. The cathode of the sixth diode is connected to one end of the sixteenth resistor. The eleventh transistor is connected to the fourth control pin through the twenty-first resistor. The base of the eleventh transistor is connected to one end of the forty-eighth resistor and the tenth capacitor. One end of each of the three capacitors is connected. Pin 6 of the multi-position switch is connected to the anode of the seventh diode. Pin 2 of the multi-position switch is connected to the anode of the eighth diode. Pin 4 of the multi-position switch is connected to the anode of the ninth diode. Pin 5 of the multi-position switch is connected to the anode of the tenth diode. The cathodes of the seventh and eighth diodes are both connected to one end of the twenty-third resistor. The other end of the twenty-third resistor is connected to pin 2 of the second field-effect chip. The cathodes of the ninth and tenth diodes are both connected to one end of the thirty-eighth resistor. The other end of the thirty-eighth resistor is connected to the base of the eighth transistor. The base and emitter of the eighth transistor are connected... A circuit is connected to the collector of the eighth transistor, one end of the twenty-fourth capacitor, and one end of the twenty-sixth resistor, all of which are connected to pin 2 of the second field-effect chip. The other ends of the seventh resistor, the tenth capacitor, the emitter of the fifth transistor, the fifteenth capacitor, the nineteenth resistor, the forty-eighth resistor, the thirteenth capacitor, the emitter of the eleventh transistor, the emitter of the eighth transistor, the other end of the twenty-fourth capacitor, and the other end of the twenty-sixth resistor are all grounded. Pins 1 of the first, second, and third field-effect chips are all connected to the current detection module.

[0012] Furthermore, the current detection module includes a first operational amplifier. Pin 1 of the first field-effect chip, pin 1 of the second field-effect chip, and pin 1 of the third field-effect chip are all connected to one end of the thirty-third resistor. One end of the thirty-third resistor is connected to one end of the thirty-fourth resistor. The other ends of the thirty-third resistor and the other ends of the thirty-fourth resistor are both grounded. The inverting input terminal of the first operational amplifier is grounded through the thirty-fifth resistor. The inverting input terminal of the first operational amplifier is connected to the output terminal through the thirty-seventh resistor. The output terminal of the first operational amplifier is connected to the detection pin through the thirty-sixth resistor. The non-inverting input terminal of the first operational amplifier is connected to one end of the thirty-third resistor.

[0013] Furthermore, the microprocessor module consists of a microprocessor chip and its peripheral circuitry.

[0014] Compared with existing technologies, the advantages of this invention are that it can achieve both automatic and manual control through the control module, and the drive unit can convert control signals and output drive current to the output interface module to drive the motor. This design can achieve forward and reverse control of dual motors by setting three control terminals: a first control terminal, a second control terminal, and a common terminal. It features high integration, simple control, and relatively low manufacturing costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system block diagram of this utility model;

[0017] Figure 2 This is a circuit connection diagram of the first field-effect chip of this utility model;

[0018] Figure 3 This is a circuit connection diagram of the second field-effect chip of this utility model;

[0019] Figure 4 This is a schematic diagram of the circuit connection of the third field-effect chip of this utility model;

[0020] Figure 5 This is a schematic diagram of the circuit structure of the boost module of this utility model;

[0021] Figure 6 This is a circuit diagram of the current detection module of this utility model;

[0022] Figure 7This is a connection diagram of the multi-position switch of this utility model;

[0023] Figure 8 This is a schematic diagram of the connection of the voltage divider resistor of this utility model;

[0024] Figure 9 This is a schematic diagram of the structure of the microprocessor chip of this utility model;

[0025] Figure 10 This is a schematic diagram of the output interface module of this utility model. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] As attached Figure 1-9 The illustrated dual-motor drive circuit includes: a power input module, a control module, a drive unit, and an output interface module; the power input module provides power to the control module and the drive unit; the control module inputs control signals to the drive unit; the drive unit receives the control signals and inputs drive current to the output interface module according to the control signals; the output interface module is provided with a first control terminal, a common terminal, and a second control terminal; a first motor is provided between the first control terminal and the common terminal, and a second motor is provided between the second control terminal and the common terminal.

[0029] Based on the above, the drive unit includes a dual H-bridge circuit module, which is time-division multiplexed according to the control signal received by the drive unit to control the direction of the drive current. The control module includes a manual control unit and an automatic control unit.

[0030] The power input module of this utility model also includes a boost module, which is used to boost the electrical energy input by the power input module and send it to the control module and drive unit. The power supply method of this design is a 5V to 12V boost module. The boost module includes a power chip U1 of model LM2735. The input 5V voltage is connected to the positive terminal of the second diode D2. The positive terminal of the second diode is also connected to one end of the sixth capacitor C6 and one end of the seventh capacitor C7. The negative terminal of the second diode is connected to pin 5 of the power chip U1, one end of the ninth resistor R9, one end of the fifth capacitor C5, and one end of the first inductor L1. The other end of the ninth capacitor C9 is connected to pin 4 of the power chip, one end of the eleventh capacitor C11, and the power control pin on the microprocessor chip U3. Pin 1 of the power chip U1 is connected to the other end of the first inductor L1 and the positive terminal of the first diode D1. The cathode of the first diode is connected to one end of the sixth resistor R6, one end of the first capacitor C1, one end of the second capacitor C2, one end of the third capacitor C3, one end of the fourth capacitor C4, and one end of the third resistor R3. The other end of the third resistor is the positive output terminal of the power input module. Pin 3 of the power chip U1 is connected to the other end of the sixth resistor, the other end of the first capacitor, and one end of the tenth resistor R10. The other ends of the first, second, third, fourth, fifth, sixth, seventh, tenth, and eleventh resistors R11, as well as pin 2 of the power chip, are all grounded. Furthermore, to make the power output terminal more intuitive, the positive output terminal of the boost module is connected to an LED light-emitting diode (LED1) via a fifth resistor R5, with the cathode of the LED grounded. When the positive output terminal is operating normally, the LED light illuminates.

[0031] It is worth mentioning that the automatic control unit of this design includes a microprocessor module and a current detection module. The current detection module is used to receive the current signals from the first motor and the second motor and feed them back to the processor module. The processor module controls the power input module based on the feedback current signals.

[0032] Based on the above, the control module includes a multi-position switch, with pin 1 of the multi-position switch connected to the positive output terminal of the power input module. The microprocessor module is provided with a first control pin, a second control pin, a third control pin, a fourth control pin, and a detection pin. The driving unit includes a first field-effect transistor Q1, a second field-effect transistor Q2, and a third field-effect transistor Q3, as well as a first field-effect chip U4, a second field-effect chip U5, and a third field-effect chip U6, each containing dual MOSFETs. The source of the second field-effect transistor is connected to its positive output terminal and a forty-second resistor R42. The other end of the forty-second resistor is connected to the gate of the first field-effect transistor Q1 and the collector of the sixth transistor Q6. The drain of the second field-effect transistor Q2 is connected to the multi-position switch S. Pin 6 of the first field-effect transistor is connected to one end of the fifteenth resistor R15. The other end of the fifteenth resistor is connected to one end of the fourteenth capacitor C14, one end of the eighteenth resistor R18, one end of the sixteenth capacitor C16, and pin 4 of the first field-effect transistor. Pins 3 and 8 of the first field-effect transistor are connected to the first control terminal and the other end of the sixteenth capacitor. The base of the sixth transistor Q6 is connected to the first control pin through the thirteenth resistor R13. The base of the sixth transistor is also connected to one end of the eighth resistor R8 and one end of the eleventh capacitor C11. Pin 5 of the first field-effect transistor is connected to pin 1 of the multi-position switch. Pin 6 of the multi-position switch is connected to the base of the ninth transistor Q9 through the twenty-ninth resistor R29. The base and emitter of the ninth transistor are connected... A 31-level resistor R31 is connected to the collector of the 9th transistor, one end of the 25th resistor R25, one end of the 23rd capacitor C23, and pin 2 of the first field-effect chip. The collector of the 9th transistor Q9 is also connected to pin 4 of the multi-position switch via the 22nd resistor R22. The other end of the 8th resistor R8, the other end of the 11th capacitor C11, the emitter of the 6th transistor Q6, the other end of the 14th capacitor C14, the other end of the 18th resistor, and the emitter of the 9th transistor are all grounded. Pin 1 of the multi-position switch is connected to the source of the 3rd field-effect transistor Q3. A 44th resistor R44 is placed between the source and gate of the 3rd field-effect transistor Q3. The drain of the 3rd field-effect transistor Q3 is connected to pin 2 of the multi-position switch. One end of the seventeenth resistor R17 is connected to the ground. The gate of the third field-effect transistor is also connected to the collector of the thirteenth transistor Q10. The base of the thirteenth transistor is connected to the second control pin through the fourteenth resistor R14. The base of the thirteenth transistor is also connected to one end of the forty-seventh resistor R47 and one end of the twelfth capacitor C12. The other end of the seventeenth resistor R17 is connected to one end of the twentieth resistor R20, one end of the eighteenth capacitor C18, one end of the twelfth capacitor C12, and pin 4 of the third field-effect chip Q3. Pins 3 and 8 of the third field-effect chip are connected to the other end of the twelfth capacitor C12 and the second control pin. Pin 5 of the multi-position switch S1 is connected to the collector of the seventh transistor Q7 through the twenty-fourth resistor R24.Pin 2 of the multi-position switch is connected to the base of the seventh transistor via the twenty-eighth resistor R28. A thirtieth resistor R30 connects the base and emitter of the seventh transistor. The collector of the seventh transistor Q7 is connected to one end of the twenty-fifth capacitor C25, one end of the twenty-seventh resistor R27, and pin 2 of the third field-effect chip U6. The other end of the forty-seventh resistor R47, the other end of the twelfth capacitor C12, the emitter of the thirteenth transistor Q10, the other end of the twentyth resistor R20, the other end of the eighteenth capacitor C18, and the emitter of the seventh transistor are all grounded. Pin 1 of the multi-position switch is also connected to the source of the first field-effect transistor Q1 and one end of the forty-first resistor R41. The gate of the first field-effect transistor is connected to the forty-first resistor... The other end is connected to the collector of the fifth transistor Q5. The drain of the first field-effect transistor is connected to pin 4 of the multi-position switch and the anode of the fifth diode D5. The cathode of the fifth diode is connected to one end of the sixteenth resistor R16. The other end of the sixteenth resistor is connected to one end of the fifteenth capacitor C15, one end of the nineteenth resistor R19, pin 4 of the second field-effect chip U5, and one end of the seventeenth capacitor C17. The other end of the seventeenth capacitor is connected to the common terminal, pins 3 and 8 of the second field-effect transistor, and pin 5 of the second field-effect chip is connected to pin 1 of the multi-position switch. The base of the fifth transistor Q5 is connected to the third control pin through the twelfth resistor R12. The base of the fifth transistor Q5 is connected to one end of the seventh resistor R7 and one end of the tenth capacitor C10. The multi-position switch is connected as follows: pin 1 is connected to the source of the fourth MOSFET Q4 and one end of the fourth resistor R4; the other end of the fourth resistor R4 is connected to the gate of the fourth MOSFET Q4 and the collector of the eleventh transistor Q11; the drain of the fourth MOSFET Q4 is connected to pin 5 of the multi-position switch and the anode of the sixth diode D6; the cathode of the sixth diode is connected to one end of the sixteenth resistor R16; the eleventh transistor Q11 is connected to the fourth control pin through the twenty-first resistor R21; the base of the eleventh transistor Q11 is connected to one end of the forty-eighth resistor R48 and one end of the thirteenth capacitor C13; pin 6 of the multi-position switch is connected to the anode of the seventh diode D7; and pin 2 of the multi-position switch is connected to the anode of the eighth diode D8. Pin 4 of the switch is connected to the anode of diode D9 (ninth diode). Pin 5 of the multi-position switch is connected to the anode of diode D10 (tenth diode). The cathodes of diodes D7 (seventh diode) and R23 (eighth diode) are connected to one end of resistor R23. The other end of resistor R23 is connected to pin 2 of the second field-effect chip. The cathodes of diodes D9 (ninth diode) and R38 (tenth diode) are connected to one end of resistor R38. The other end of resistor R38 is connected to the base of transistor Q8. Resistor R32 is connected between the base and emitter of transistor Q8. The collector of transistor Q8, one end of capacitor C24 (twenty-fourth capacitor), and one end of resistor R26 (twenty-sixth resistor) are all connected to pin 2 of the second field-effect chip U5.The other end of the seventh resistor R7, the other end of the tenth capacitor C10, the emitter of the fifth transistor Q5, the other end of the fifteenth capacitor C15, the other end of the nineteenth resistor, the other end of the forty-eighth resistor, the other end of the thirteenth capacitor, the emitter of the eleventh transistor, the emitter of the eighth transistor, the other end of the twenty-fourth capacitor, and the other end of the twenty-sixth resistor are all grounded. Pin 1 of the first field-effect chip, pin 1 of the second field-effect chip, and pin 1 of the third field-effect chip are all connected to the current detection module. The current detection module includes a first operational amplifier U2. Pin 1 of the first field-effect chip U4, pin 1 of the second field-effect chip U5, and pin 1 of the third field-effect chip U6 are all connected to one end of the thirty-third resistor R33. One end of the thirty-third resistor R33 is connected to one end of the thirty-fourth resistor R34. The other ends of the thirty-third and thirty-fourth resistors are both grounded. The inverting input of the first operational amplifier is grounded through the thirty-fifth resistor R35. The inverting input of the first operational amplifier is connected to the output through the thirty-seventh resistor R37. The output of the first operational amplifier is connected to the detection pin through the thirty-sixth resistor R36. The non-inverting input of the first operational amplifier is connected to one end of the thirty-third resistor R33.

[0033] The microprocessor module consists of a microprocessor chip of model FS32K144 and its peripheral circuits. The first field-effect chip, the second field-effect chip and the third field-effect chip are all model JMTP330N06D.

[0034] The specific working principle of the drive unit of this utility model is as follows: When the multi-position switch is turned to the point where pins 1 and 6 are connected, the first set of field-effect transistors of the first field-effect chip is turned on, that is, pins 5 and 3 are connected. The positive output terminal is connected to the first control terminal through pins 5 and 3 of the first field-effect chip. At the same time, the current drives the second set of field-effect transistors of the second field-effect chip to be turned on through the seventh diode, that is, pins 1 and 8 of the second field-effect chip are connected, and grounded through the thirty-third resistor. At this time, the direction of the drive current is: the positive output terminal of the power input module, pins 5 and 3 of the first field-effect chip, the first control terminal, the first motor, the common terminal, pins 8 and 1 of the second field-effect chip, and the circuit connection is completed by grounding through the thirty-third resistor, realizing the forward rotation of the first motor.

[0035] When the multi-position switch is turned to the point where pins 1 and 4 are connected, the electrical energy connected to pin 1 of the multi-position switch drives the second set of field-effect transistors of the first field-effect chip to conduct through the 22nd resistor, i.e., pins 1 and 8 of the first field-effect chip are connected, and grounded through the 33rd resistor. At the same time, the first set of field-effect transistors of the second field-effect chip is driven to conduct through the 5th diode and the 16th resistor, i.e., pins 5 and 3 of the second field-effect chip are connected, and the positive output terminal is connected to the common terminal through pins 5 and 3 of the second field-effect chip. At this time, the direction of the drive current is: positive output terminal of the power input module, pins 5 and 3 of the second field-effect chip, common terminal, first motor, pins 1 and 8 of the first field-effect chip, and grounded through the 33rd resistor to complete the loop connection, realizing the reversal of the first motor.

[0036] When the multi-position switch is turned to the point where pins 1 and 2 are connected, the first set of field-effect transistors of the third field-effect chip is turned on, i.e., pins 5 and 3 of the third field-effect chip are connected. The positive output terminal is connected to the second control terminal through pins 5 and 3 of the third field-effect chip. At the same time, the current drives the second set of field-effect transistors of the second field-effect chip to conduct through the eighth diode, i.e., pins 1 and 8 of the second field-effect chip are connected, and grounded through the thirty-third resistor. At this time, the direction of the drive current is: positive output terminal of the power input module, pins 5 and 3 of the third field-effect chip, second control terminal, second motor, common terminal, pins 8 and 1 of the second field-effect chip, and the circuit connection is completed through the thirty-third resistor to ground, realizing the forward rotation of the second motor.

[0037] When the multi-position switch is turned to the point where pins 1 and 5 are connected, the electrical energy connected to pin 1 of the multi-position switch drives the second set of field-effect transistors of the third field-effect chip to conduct through the 24th resistor R24, i.e., pins 1 and 8 of the third field-effect chip are connected, and grounded through the 33rd resistor. At the same time, the first set of field-effect transistors of the second field-effect chip is driven to conduct through the 6th diode and the 16th resistor, i.e., pins 5 and 3 of the second field-effect chip are connected, and the positive output terminal is connected to the common terminal through pins 5 and 3 of the second field-effect chip. At this time, the direction of the drive current is: positive output terminal of the power input module, pins 5 and 3 of the second field-effect chip, common terminal, second motor, pins 1 and 8 of the third field-effect chip, and grounded through the 33rd resistor to complete the loop connection, realizing the reversal of the second motor.

[0038] When pins 1 and 3 of the multi-position switch are connected, a voltage divider is formed by resistors R58 (58th resistor) and R63 (63rd resistor), and the automatic control signal is transmitted to the automatic control terminal of the microprocessor chip. At this time, the microprocessor chip outputs corresponding high and low levels to its first, second, third, and fourth control pins, thereby controlling the drive unit.

[0039] Specifically, when the microprocessor chip outputs a high level to the first control pin, it drives the sixth transistor to conduct, pulling down the gate voltage of the second field-effect transistor, thereby driving the second field-effect transistor to conduct, and further driving the first group of field-effect transistors of the first field-effect chip to conduct; at the same time, the power from the seventh diode drives the second group of field-effect transistors of the second field-effect chip to conduct. At this time, the direction of the drive current is: the positive output terminal of the power input module, pins 5 and 3 of the first field-effect chip, the first control terminal, the first motor, the common terminal, pins 8 and 1 of the second field-effect chip, and the loop connection is completed by grounding through the thirty-third resistor, realizing the forward rotation of the first motor.

[0040] When the microprocessor chip outputs a high level to the second control pin, it drives the thirteenth transistor to conduct, pulling down the gate voltage of the third field-effect transistor, thereby driving the third field-effect transistor to conduct, and in turn driving the first group of field-effect transistors of the third field-effect chip to conduct; at the same time, the power from the eighth diode drives the second group of field-effect transistors of the second field-effect chip to conduct. At this time, the direction of the drive current is: the positive output terminal of the power input module, pins 5 and 3 of the third field-effect chip, the second control terminal, the second motor, the common terminal, pins 8 and 1 of the second field-effect chip, and the loop connection is completed by grounding through the thirty-third resistor, realizing the forward rotation of the second motor.

[0041] When the microprocessor chip outputs a high level to the third control pin, it drives the fifth transistor to conduct, pulling down the gate voltage of the first field-effect transistor, thereby driving the first field-effect transistor to conduct, and then driving the first group of field-effect transistors of the second field-effect chip to conduct; at the same time, the power through the twenty-second resistor drives the second group of field-effect transistors of the first field-effect chip to conduct. At this time, the direction of the drive current is: the positive output terminal of the power input module, pins 5 and 3 of the second field-effect chip, the common terminal, the first motor, pins 1 and 8 of the first field-effect chip, and the circuit connection is completed by grounding through the thirty-third resistor, realizing the reversal of the first motor.

[0042] When the microprocessor chip outputs a high level to the fourth control pin, it drives the eleventh transistor to conduct, pulling down the gate voltage of the fourth field-effect transistor, thereby driving the fourth field-effect transistor to conduct, and then driving the first group of field-effect transistors of the second field-effect chip to conduct; at the same time, the power through the twenty-fourth resistor drives the second group of field-effect transistors of the third field-effect chip to conduct. At this time, the direction of the drive current is: the positive output terminal of the power input module, pins 5 and 3 of the second field-effect chip, the common terminal, the second motor, pins 1 and 8 of the third field-effect chip, and the loop connection is completed by grounding through the thirty-third resistor, realizing the reversal of the second motor.

[0043] During the control of the rotation of the first and second motors, the current detection module, specifically the 33rd and 34th resistors, detects the current passing through the first and second motors. The current is amplified by the first operational amplifier and sent to the detection pin of the microprocessor chip. When the detected current is too large, the power control pin of the microprocessor chip pulls down pin 4 of the power chip to stop it from working, thereby preventing the motor from burning out due to excessive current.

[0044] It is worth mentioning that the fifth, sixth, seventh, eighth, ninth, and tenth diodes in this invention can prevent reverse current flow. The seventh, eighth, and ninth transistors are interlocked to prevent the same group of field-effect transistors from turning on at the same time and causing a short circuit.

[0045] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A dual-motor drive circuit, characterized in that, include: Power input module, control module, drive unit, and output interface module; The power input module is used to provide power to the control module and drive unit; The control module is used to input control signals to the drive unit; the drive unit is used to receive the control signals and input drive current to the output interface module according to the control signals. The output interface module is provided with a first control terminal, a common terminal and a second control terminal. A first motor is provided between the first control terminal and the common terminal, and a second motor is provided between the second control terminal and the common terminal.

2. The dual-motor drive circuit according to claim 1, characterized in that, The driving unit includes a dual H-bridge circuit module, which is turned on in a time-division manner according to the control signal received by the driving unit to control the direction of the driving current.

3. The dual-motor drive circuit according to claim 2, characterized in that, The control module includes a manual control unit and an automatic control unit.

4. The dual-motor drive circuit according to claim 1, characterized in that, The power input module is also provided with a boost module, which is used to boost the electrical energy input by the power input module and send it to the control module and the drive unit.

5. A dual-motor drive circuit according to claim 4, characterized in that, The positive output terminal of the boost module is connected to the LED light through a fifth resistor.

6. A dual-motor drive circuit according to claim 3, characterized in that, The automatic control unit includes a microprocessor module and a current detection module. The current detection module is used to receive current signals from the first motor and the second motor and feed them back to the processor module. The processor module controls the power input module based on the feedback current signals.

7. A dual-motor drive circuit according to claim 6, characterized in that, The control module includes a multi-position switch, with pin 1 of the multi-position switch connected to the positive output terminal of the power input module. The microprocessor module is equipped with a first control pin, a second control pin, a third control pin, a fourth control pin, and a detection pin. The driving unit includes a first field-effect transistor (FET), a second FET, and a third FET, as well as a first FET chip, a second FET chip, and a third FET chip containing dual MOSFETs. The source of the second FET is connected to its positive output terminal and a forty-second resistor. The other end of the forty-second resistor is connected to the gate of the first FET and the collector of the sixth transistor. The drain of the second FET is connected to pin 6 of the multi-position switch and one end of a fifteenth resistor. The other end of the fifteenth resistor is connected to one end of a fourteenth capacitor, one end of an eighteenth resistor, one end of a sixteenth capacitor, and pin 4 of the first FET chip. Pins 3 and 8 are both connected to the first control terminal and the other end of the sixteenth capacitor. The base of the sixth transistor is connected to the first control pin through the thirteenth resistor. The base of the sixth transistor is also connected to one end of the eighth resistor and one end of the eleventh capacitor. Pin 5 of the first field-effect chip is connected to pin 1 of the multi-position switch. Pin 6 of the multi-position switch is connected to the base of the ninth transistor through the twenty-ninth resistor. A thirty-first resistor is connected between the base and emitter of the ninth transistor. The collector of the ninth transistor is connected to one end of the twenty-fifth resistor, one end of the twenty-third capacitor, and pin 2 of the first field-effect chip. The collector of the ninth transistor is also connected to pin 4 of the multi-position switch through the twenty-second resistor. The other end of the eighth resistor, the other end of the eleventh capacitor, the emitter of the sixth transistor, the other end of the fourteenth capacitor, the other end of the eighteenth resistor, and the emitter of the ninth transistor are all grounded.Pin 1 of the multi-position switch is connected to the source of the third field-effect transistor (FET). A forty-fourth resistor is placed between the source and gate of the third FET. The drain of the third FET is connected to pin 2 of the multi-position switch and one end of the seventeenth resistor. The gate of the third FET is also connected to the collector of the thirteenth transistor. The base of the thirteenth transistor is connected to the second control pin through the fourteenth resistor. The base of the thirteenth transistor is also connected to one end of the forty-seventh resistor and one end of the twelfth capacitor. The other end of the seventeenth resistor is connected to one end of the twentieth resistor, one end of the eighteenth capacitor, one end of the twelfth capacitor, and pin 4 of the third FET chip. Pins 3 and 8 of the multi-position switch are connected to the other end of the twelfth capacitor and the second control terminal. Pin 5 of the multi-position switch is connected to the collector of the seventh transistor through the twenty-fourth resistor. Pin 2 of the multi-position switch is connected to the base of the seventh transistor through the twenty-eighth resistor. A thirtieth resistor is connected between the base and emitter of the seventh transistor. The collector of the seventh transistor is connected to one end of the twenty-fifth capacitor, one end of the twenty-seventh resistor, and pin 2 of the third field-effect chip. The other end of the forty-seventh resistor, the other end of the twelfth capacitor, the emitter of the thirteenth transistor, the other end of the twentyth resistor, the other end of the eighteenth capacitor, and the emitter of the seventh transistor are all grounded.Pin 1 of the multi-position switch is also connected to the source of the first field-effect transistor and one end of the forty-first resistor. The gate of the first field-effect transistor is connected to the other end of the forty-first resistor and the collector of the fifth transistor. The drain of the first field-effect transistor is connected to pin 4 of the multi-position switch and the anode of the fifth diode. The cathode of the fifth diode is connected to one end of the sixteenth resistor. The other end of the sixteenth resistor is connected to one end of the fifteenth capacitor, one end of the nineteenth resistor, pin 4 of the second field-effect chip, and one end of the seventeenth capacitor. The other end of the seventeenth capacitor is connected to the common terminal, pins 3 and 8 of the second field-effect transistor, and pin 5 of the second field-effect chip is connected to the multi-position switch. Pin 1 is connected. The base of the fifth transistor is connected to the third control pin through the twelfth resistor. The base of the fifth transistor is connected to one end of the seventh resistor and one end of the tenth capacitor. Pin 1 of the multi-position switch is connected to the source of the fourth field-effect transistor and one end of the fourth resistor. The other end of the fourth resistor is connected to the gate of the fourth field-effect transistor and the collector of the eleventh transistor. The drain of the fourth field-effect transistor is connected to pin 5 of the multi-position switch and the anode of the sixth diode. The cathode of the sixth diode is connected to one end of the sixteenth resistor. The eleventh transistor is connected to the fourth control pin through the twenty-first resistor. The base of the eleventh transistor is connected to one end of the forty-eighth resistor and the tenth capacitor. One end of each of the three capacitors is connected. Pin 6 of the multi-position switch is connected to the anode of the seventh diode. Pin 2 of the multi-position switch is connected to the anode of the eighth diode. Pin 4 of the multi-position switch is connected to the anode of the ninth diode. Pin 5 of the multi-position switch is connected to the anode of the tenth diode. The cathodes of the seventh and eighth diodes are both connected to one end of the twenty-third resistor. The other end of the twenty-third resistor is connected to pin 2 of the second field-effect chip. The cathodes of the ninth and tenth diodes are both connected to one end of the thirty-eighth resistor. The other end of the thirty-eighth resistor is connected to the base of the eighth transistor. The base and emitter of the eighth transistor are connected... A circuit is connected to the collector of the eighth transistor, one end of the twenty-fourth capacitor, and one end of the twenty-sixth resistor, all of which are connected to pin 2 of the second field-effect chip. The other ends of the seventh resistor, the tenth capacitor, the emitter of the fifth transistor, the fifteenth capacitor, the nineteenth resistor, the forty-eighth resistor, the thirteenth capacitor, the emitter of the eleventh transistor, the emitter of the eighth transistor, the other end of the twenty-fourth capacitor, and the other end of the twenty-sixth resistor are all grounded. Pins 1 of the first, second, and third field-effect chips are all connected to the current detection module.

8. A dual-motor drive circuit according to claim 7, characterized in that, The current detection module includes a first operational amplifier. Pin 1 of the first field-effect chip, pin 1 of the second field-effect chip, and pin 1 of the third field-effect chip are all connected to one end of the thirty-third resistor. One end of the thirty-third resistor is connected to one end of the thirty-fourth resistor. The other ends of the thirty-third resistor and the other ends of the thirty-fourth resistor are both grounded. The inverting input terminal of the first operational amplifier is grounded through the thirty-fifth resistor. The inverting input terminal of the first operational amplifier is connected to the output terminal through the thirty-seventh resistor. The output terminal of the first operational amplifier is connected to the detection pin through the thirty-sixth resistor. The non-inverting input terminal of the first operational amplifier is connected to one end of the thirty-third resistor.

9. A dual-motor drive circuit according to claim 6, characterized in that, The microprocessor module consists of a microprocessor chip and its peripheral circuits.

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