CN220798110U

CN220798110U - Motor bidirectional driving circuit

Info

Publication number: CN220798110U
Application number: CN202322539458.1U
Authority: CN
Inventors: 王澜
Original assignee: Shanghai Hongtai Electronic Technology Co ltd
Current assignee: Shanghai Hongtai Electronic Technology Co ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-04-16
Anticipated expiration: 2033-09-19

Abstract

The motor bidirectional driving circuit comprises a motor, a current control signal first input end, a current control signal first amplifying circuit, a current control signal second converting circuit and a third current control circuit, wherein the current control signal first input end is connected with the current control signal first amplifying circuit and the current control signal second converting circuit; the second input end of the current control signal is connected with the third amplifying circuit of the current control signal and the first converting circuit of the current control signal, the third amplifying circuit of the current control signal is connected with the first current control circuit, and the first converting circuit of the current control signal is connected with the fourth amplifying circuit of the current control signal and then is connected with the fourth circuit of the current control; the current input end is connected with the first current control circuit and the second current control circuit. The utility model can realize the bidirectional controllable flow of current, thereby achieving the purpose of bidirectional driving of the motor.

Description

Motor bidirectional driving circuit

Technical Field

The utility model relates to the technical field of motor drive circuits, in particular to a bidirectional drive circuit.

Background

As a motor driving circuit, the operation of the motor in the unused direction is controlled by switching the high and low levels of a current control signal in the circuit to thereby control the direction of the current.

However, the current motor driving circuit cannot realize bidirectional controllable flow of current and cannot achieve the purpose of bidirectional driving of the motor.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a motor bidirectional driving circuit.

The technical scheme adopted for solving the technical problems is as follows:

a motor bidirectional driving circuit comprises a current control signal input end, a current control signal conversion circuit, a current control signal amplifying circuit, a current control circuit and a current input end; the first input end of the current control signal is connected with the first amplifying circuit of the current control signal and the second converting circuit of the current control signal, the first amplifying circuit of the current control signal is connected with the second current control circuit, and the first converting circuit of the current control signal is connected with the second amplifying circuit of the current control signal and then is connected with the third current control circuit; the second input end of the current control signal is connected with the third amplifying circuit of the current control signal and the first converting circuit of the current control signal, the third amplifying circuit of the current control signal is connected with the first current control circuit, and the first converting circuit of the current control signal is connected with the fourth amplifying circuit of the current control signal and then is connected with the fourth circuit of the current control; the current input end is connected with the first current control circuit and the second current control circuit.

The utility model also has the following additional technical characteristics:

the technical scheme of the utility model is further specifically optimized: the network name of the current input end is positive polarity power +12V, the positive polarity power +12V is connected with one end of a capacitor C1 and one end of a capacitor C8, and the other end of the capacitor C1 and the other end of the capacitor C8 are grounded GND.

The technical scheme of the utility model is further specifically optimized: the network name of the first input end of the current control signal is UART1_TXD/GPIO_1, and UART1_TXD/GPIO_1 is connected with one end of a resistor R2 and one end of a resistor R33.

The technical scheme of the utility model is further specifically optimized: the network name of the second input end of the current control signal is UART1_RTS/GPIO_2, and UART1_RTS/GPIO_2 is connected with one end of a resistor R32 and one end of a resistor R14.

The technical scheme of the utility model is further specifically optimized: the motor interface CON4 is used as an input/output interface of motor current; the 1 st pin of the motor interface CON4 is connected with one end of a capacitor C467, the 2 nd pin of the motor interface CON4 is connected with one end of a resistor R11, and the other end of the capacitor C467 is connected with the other end of the resistor R11.

The technical scheme of the utility model is further specifically optimized: the resistor R2 is an input starting end of the control signal first amplifying circuit; one end of a resistor R2 is connected with the UART1 TXD/GPIO_1, and the 1 st pin of a triode Q2 at the other end of the resistor R2 is connected with one end of a resistor R37; the resistor R37 and the 3 rd pin of the triode Q2 are connected with the GND; the 2 nd pin of the triode Q2 is connected with one end of a resistor R3 and one end of a resistor R5, and the other end of the resistor R3 is connected with a positive polarity power supply +12V of a current input end.

The technical scheme of the utility model is further specifically optimized: resistor R5 is used as the starting end of a control input signal of the current control second circuit; one end of a resistor R5 is connected with the 2 nd pin of the Q2 of the triode and one end of a resistor R3, and the other end of the resistor R5 is connected with the G1 pin of the field effect transistor U4A; the S1 pin of the field effect tube U4A is connected with positive polarity power supply +12V, and the D1 pin of the field effect tube U4A is connected with the 2 nd pin of the motor current output interface motor interface CON 4.

The technical scheme of the utility model is further specifically optimized: resistor R33 is the input start end of the second conversion circuit of the current control signal; one end of a resistor R33 is connected with the UART1_TXD/GPIO_1, the other end of the resistor R33 is connected with a first pin of a triode Q8 and one end of a resistor R34, and the other end of the resistor R34 and a 3 rd pin of the triode Q8 are grounded GND; the 2 nd pin of the triode Q8 is connected with one end of a resistor R40.

The technical scheme of the utility model is further specifically optimized: one end of the resistor R40 is connected with the 2 nd pin of the triode Q8; the resistor R40 is used as a signal input starting end of the control signal second amplifying circuit; the other end of the resistor R40 is connected with one end of the resistor R39 and the pin B of the triode Q9; the other end of the resistor R39 and the E pin of the triode Q9 are connected with positive polarity power supply +12V, and the C pin of the triode Q9 and one end of the resistor R6.

The technical scheme of the utility model is further specifically optimized: resistor R6 is used as the input starting end of the current control third circuit; one end of a resistor R6 is connected with a pin C of a triode Q9, the other end of the resistor R6 is connected with a pin G2 of a field effect tube U3B, the 2 end of the resistor R6 is connected with a diode, and one end close to the field effect tube U3B is connected with the anode of the diode; the D2 pin of the field effect tube U3B is connected with the 1 st pin of the motor current output interface motor interface CON 4; the S2 pin of the field effect transistor U3B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND.

The technical scheme of the utility model is further specifically optimized: the resistor R14 is the input starting end of the control signal third amplifying circuit; one end of a resistor R14 is connected with a UART1_RTS/GPIO_2, and the 1 st pin of a triode Q3 at the other end of the resistor R14 is connected with one end of a resistor R38; the resistor R38 and the 3 rd pin of the triode Q3 are connected with GND; the 2 nd pin of the triode Q3 is connected with one end of a resistor R45 and one end of a resistor R7, and the other end of the resistor R45 is connected with a positive polarity power supply +12V of a current input end.

The technical scheme of the utility model is further specifically optimized: resistor R7 is used as the start end of the control input signal of the current control first circuit; the other end of the resistor R7 is connected with the G1 pin of the field effect transistor U3A; the S1 pin of the field effect tube U3A is connected with positive polarity power +12V, and the D1 pin of the field effect tube U3A is connected with the 1 st pin of the motor current output interface motor interface CON 4.

The technical scheme of the utility model is further specifically optimized: resistor R32 is the input starting end of the first conversion circuit of the current control signal; one end of a resistor R32 is connected with a UART1_RTS/GPIO_2, the other end of the resistor R32 is connected with a first pin of a triode Q7 and one end of a resistor R36, and the other end of the resistor R36 and a 3 rd pin of the triode Q7 are grounded GND; the 2 nd pin of the triode Q7 is connected with one end of a resistor R35.

The technical scheme of the utility model is further specifically optimized: the resistor R35 is used as a signal input starting end of a control signal fourth amplifying circuit; one end of a resistor R35 is connected with the 2 nd pin of the triode Q7; the other end of the resistor R35 is connected with one end of the resistor R31 and the pin B of the triode Q10; the other end of the resistor R31 and the E pin of the triode Q10 are connected with positive polarity power supply +12V, and the C pin of the triode Q10 and one end of the resistor R8.

The technical scheme of the utility model is further specifically optimized: resistor R8 is used as the input starting end of the current control third circuit; one end of a resistor R8 is connected with a pin C of the Q10, the other end of the resistor R8 is connected with a pin G2 of the field effect transistor U4B, the 2 end of the resistor R6 is connected with a diode, and one end close to the field effect transistor U4B is connected with the anode of the diode; the D2 pin of the field effect tube U4B is connected with the 1 st pin of the motor current output interface motor interface CON4, the S2 pin of the field effect tube U4B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND.

Compared with the prior art, the utility model has the advantages that:

the utility model can realize the bidirectional controllable flow of current, thereby achieving the purpose of bidirectional driving of the motor.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

Example 1

The network name of the current input end is positive polarity power +12V, the positive polarity power +12V is connected with one end of a capacitor C1 and one end of a capacitor C8, and the other end of the capacitor C1 and the other end of the capacitor C8 are grounded GND.

The network name of the first input end of the current control signal is UART1_TXD/GPIO_1, and UART1_TXD/GPIO_1 is connected with one end of a resistor R2 and one end of a resistor R33.

The network name of the second input end of the current control signal is UART1_RTS/GPIO_2, and UART1_RTS/GPIO_2 is connected with one end of a resistor R32 and one end of a resistor R14.

The motor interface CON4 is used as an input/output interface of motor current; the 1 st pin of the motor interface CON4 is connected with one end of a capacitor C467, the 2 nd pin of the motor interface CON4 is connected with one end of a resistor R11, and the other end of the capacitor C467 is connected with the other end of the resistor R11.

The resistor R2 is an input starting end of the control signal first amplifying circuit; one end of the resistor R2 is connected with

The other end of the resistor R2 is connected with the 1 st pin of the triode Q2 and one end of the resistor R37; the resistor R37 and the 3 rd pin of the triode Q2 are connected with the GND; the 2 nd pin of the triode Q2 is connected with one end of a resistor R3 and one end of a resistor R5, and the other end of the resistor R3 is connected with a positive polarity power supply +12V of a current input end.

Resistor R5 is used as the starting end of a control input signal of the current control second circuit; one end of a resistor R5 is connected with the 2 nd pin of the Q2 of the triode and one end of a resistor R3, and the other end of the resistor R5 is connected with the G1 pin of the field effect transistor U4A; the S1 pin of the field effect tube U4A is connected with positive polarity power supply +12V, and the D1 pin of the field effect tube U4A is connected with the 2 nd pin of the motor current output interface motor interface CON 4.

Resistor R33 is the input start end of the second conversion circuit of the current control signal; one end of a resistor R33 is connected with the UART1_TXD/GPIO_1, the other end of the resistor R33 is connected with a first pin of a triode Q8 and one end of a resistor R34, and the other end of the resistor R34 and a 3 rd pin of the triode Q8 are grounded GND; the 2 nd pin of the triode Q8 is connected with one end of a resistor R40.

One end of the resistor R40 is connected with the 2 nd pin of the triode Q8; the resistor R40 is used as a signal input starting end of the control signal second amplifying circuit; the other end of the resistor R40 is connected with one end of the resistor R39 and the pin B of the triode Q9; the other end of the resistor R39 and the E pin of the triode Q9 are connected with positive polarity power supply +12V, and the C pin of the triode Q9 and one end of the resistor R6.

Resistor R6 is used as the input starting end of the current control third circuit; one end of a resistor R6 is connected with a pin C of a triode Q9, the other end of the resistor R6 is connected with a pin G2 of a field effect tube U3B, the 2 end of the resistor R6 is connected with a diode, and one end close to the field effect tube U3B is connected with the anode of the diode; the D2 pin of the field effect tube U3B is connected with the 1 st pin of the motor current output interface motor interface CON 4; the S2 pin of the field effect transistor U3B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND.

The resistor R14 is the input starting end of the control signal third amplifying circuit; one end of a resistor R14 is connected with a UART1_RTS/GPIO_2, and the 1 st pin of a triode Q3 at the other end of the resistor R14 is connected with one end of a resistor R38; the resistor R38 and the 3 rd pin of the triode Q3 are connected with GND; the 2 nd pin of the triode Q3 is connected with one end of a resistor R45 and one end of a resistor R7, and the other end of the resistor R45 is connected with a positive polarity power supply +12V of a current input end.

Resistor R7 is used as the start end of the control input signal of the current control first circuit; the other end of the resistor R7 is connected with the G1 pin of the field effect transistor U3A; the S1 pin of the field effect tube U3A is connected with positive polarity power +12V, and the D1 pin of the field effect tube U3A is connected with the 1 st pin of the motor current output interface motor interface CON 4.

Resistor R32 is the input starting end of the first conversion circuit of the current control signal; one end of a resistor R32 is connected with a UART1_RTS/GPIO_2, the other end of the resistor R32 is connected with a first pin of a triode Q7 and one end of a resistor R36, and the other end of the resistor R36 and a 3 rd pin of the triode Q7 are grounded GND; the 2 nd pin of the triode Q7 is connected with one end of a resistor R35.

The resistor R35 is used as a signal input starting end of a control signal fourth amplifying circuit; one end of a resistor R35 is connected with the 2 nd pin of the triode Q7; the other end of the resistor R35 is connected with one end of the resistor R31 and the pin B of the triode Q10; the other end of the resistor R31 and the E pin of the triode Q10 are connected with positive polarity power supply +12V, and the C pin of the triode Q10 and one end of the resistor R8.

Resistor R8 is used as the input starting end of the current control third circuit; one end of a resistor R8 is connected with a pin C of the Q10, the other end of the resistor R8 is connected with a pin G2 of the field effect transistor U4B, the 2 end of the resistor R6 is connected with a diode, and one end close to the field effect transistor U4B is connected with the anode of the diode; the D2 pin of the field effect tube U4B is connected with the 1 st pin of the motor current output interface motor interface CON4, the S2 pin of the field effect tube U4B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND.

Example 2

A motor bidirectional driving circuit comprises a current control signal input end, a current control signal conversion circuit, a current control signal amplifying circuit, a current control circuit and a current input end.

The network name of the current input end is positive polarity power +12V, the positive polarity power +12V is connected with one end of a capacitor C1 and one end of a capacitor C8, and the other end of the capacitor C1 and the other end of the capacitor C8 are grounded GND. The capacitor C1 and the capacitor C8 form a filter circuit with positive polarity power supply +12V together, so that the ripple of the current input into the motor by the positive polarity power supply +12V is filtered, the motor current is more stable, and the voltage abrupt change of the motor current is slowed down.

The network name of the first input end of the control signal is UART1_TXD/GPIO_1, and UART1_TXD/GPIO_1 is connected with one end of a resistor R2 and one end of a resistor R33. The signal at the first input of the current control signal controls the motor current to flow from pin 2 of motor interface CON4 to pin 1 of motor interface CON 4.

One end of the resistor R2 is connected with the UART1_TXD/GPIO_1, and the other end of the resistor R2 is connected with the 1 st pin of the triode Q2 and one end of the resistor R37. Resistor R37 and pin 3 of transistor Q2 are connected to GND. The 2 nd pin of the triode Q2 is connected with one end of a resistor R3 and one end of a resistor R5, and the other end of the resistor R3 is connected with a positive polarity power supply +12V of a current input end. The resistor R2, R37, R3 and the triode Q2 form a first amplifying circuit for the control signal, so that the voltage of the control signal is changed from 1.7V to 2.5V to 12V.

The other end of the resistor R5 is connected with the G1 pin of the field effect transistor U4A. The S1 pin of the field effect tube U4A is connected with positive polarity power supply +12V, and the D1 pin of the field effect tube U4A is connected with the 2 nd pin of the motor current output interface motor interface CON 4. The resistor R5 and the field effect tube U4A form a current control two circuit, when the G1 pin of the field effect tube U4A is at a high level, the current is conducted, the current is input from the S1 pin of the field effect tube U4A and then output from the D1 pin of the field effect tube U4A, and when the G1 pin of the field effect tube U4A is at a low level, the current is not conducted and the current is not circulated.

One end of a synchronous resistor R33 is connected with the UART1_TXD/GPIO_1, the other end of the resistor R33 is connected with the first pin of the triode Q8 and one end of a resistor R34, and the other end of the resistor R34 and the 3 rd pin of the triode Q8 are grounded GND. The 2 nd pin of the triode Q8 is connected with one end of a resistor R40. The resistor R33, the resistor R34, the resistor R40 and the triode Q8 form a control signal second conversion circuit, the control signal second conversion circuit converts the level of the UART1 TXD/GPIO 1, when the UART1 TXD/GPIO 1 is in a high level, the 2 nd pin of the triode Q8 and the 3 rd pin of the triode Q8 are conducted from the inside, and the 3 rd pin of the triode Q8 is grounded GND, so that the 2 nd pin of the triode Q8 is changed into a low level. When uart1_txd/gpio_1 is low, the 2 nd pin of the transistor Q8 is not conductive with the 3 rd pin of the transistor Q8, so that the 2 nd pin of the transistor Q8 keeps high level unchanged.

The other end of the resistor R40 is connected with one end of the resistor R39 and the pin B of the triode Q9. The other end of the resistor R39 and the E pin of the triode Q9 are connected with positive polarity power supply +12V, and the C pin of the triode Q9 and one end of the resistor R6. The resistor R39, the resistor R6 and the triode Q9 form a control signal second amplifying circuit, when the input of the pin B of the triode Q9 is high level, the pin E of the triode Q9 and the pin C of the triode Q9 are conducted from the inside, so that the pin C of the triode Q9 keeps high level, and meanwhile, the voltage of the control signal is changed from 1.7V-2.5V to 12V. When the B pin of the triode Q9 is input to be at a low level, the E pin of the triode Q9 and the C pin of the triode Q9 are not conducted from the inside, so that the C pin of the triode Q9 is kept at a low level.

The other end of the resistor R6 is connected with the G2 pin of the field effect tube U3B, and the D2 pin of the field effect tube U3B is connected with the 1 st pin of the motor current output interface motor interface CON 4. The S2 pin of the field effect transistor U3B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND. The resistor R6, the resistor R69 and the field effect transistor U3B control the third circuit, when the G2 pin of the field effect transistor U3B is input to be in a high level, the current is conducted, and after the current is input from the D2 pin of the field effect transistor U3B, the current is output from the S2 pin of the field effect transistor U3B and flows to GND through the resistor R69. When the G2 pin of the field effect transistor U3B is input to be at a low level, the current is not conducted, and the current does not flow.

The network name of the second input end of the control signal is UART1_RTS/GPIO_2, and UART1_RTS/GPIO_2 is connected with one end of the resistor R32 and one end of the resistor R14. The signal at the first input of the current control signal controls the motor current to flow from pin 1 of motor interface CON4 to pin 2 of motor interface CON 4.

One end of the resistor R14 is connected with the UART1_RTS/GPIO_2, and the other end of the resistor R14 is connected with the 1 st pin of the triode Q3 and one end of the resistor R38. Resistor R38 and pin 3 of transistor Q3 are connected to GND. The 2 nd pin of the triode Q3 is connected with one end of a resistor R45 and one end of a resistor R7, and the other end of the resistor R45 is connected with a positive polarity power supply +12V of a current input end. The resistor R14, the resistor R38, the resistor R45 and the triode Q3 form a first amplifying circuit of the control signal, so that the voltage of the control signal is changed from 1.7V to 2.5V to 12V.

The other end of the resistor R7 is connected with the G1 pin of the field effect transistor U3A. The S1 pin of the field effect tube U3A is connected with positive polarity power +12V, and the D1 pin of the field effect tube U3A is connected with the 1 st pin of the motor current output interface CON 4. The resistor R7 and the field effect tube U3A form a current control circuit, when the G1 pin of the field effect tube U3A is at a high level, the current is conducted, the current is input from the S1 pin of the field effect tube U3A and then output from the D1 pin of the field effect tube U4A, and when the G1 pin of the field effect tube U3A is at a low level, the current is not conducted and the current is not circulated.

One end of the synchronous resistor R32 is connected with the UART1_RTS/GPIO_2, the other end of the resistor R32 is connected with the first pin of the triode Q7 and one end of the resistor R36, and the other end of the resistor R36 and the 3 rd pin of the triode Q7 are grounded GND. The 2 nd pin of the triode Q7 is connected with one end of a resistor R35. The resistor R32, the resistor R36, the resistor R35 and the triode Q7 form a control signal first conversion circuit, the control signal first conversion circuit converts the level of the UART1_RTS/GPIO_2, when the UART1_RTS/GPIO_2 is in a high level, the 2 nd pin of the triode Q7 and the 3 rd pin of the triode Q7 are conducted from the inside, and the 3 rd pin of the triode Q7 is grounded GND, so that the 2 nd pin of the triode Q7 is changed into a low level. When uart1_rts/gpio_2 is low, the 2 nd pin of the transistor Q7 is not conductive with the 3 rd pin of the transistor Q7, so that the 2 nd pin of the transistor Q7 keeps high level unchanged.

The other end of the resistor R35 is connected with one end of the resistor R31 and the pin B of the triode Q10. The other end of the resistor R31 and the E pin of the triode Q10 are connected with positive polarity power supply +12V, and the C pin of the triode Q10 and one end of the resistor R8. The resistor R35, the resistor R31 and the triode Q10 form a control signal fourth amplifying circuit, when the input of the pin B of the triode Q10 is high level, the pin E of the triode Q10 and the pin C of the triode Q10 are conducted from inside, so that the pin C of the triode Q10 keeps high level, and meanwhile, the voltage of the control signal is changed from 1.7V-2.5V to 12V. When the B pin of the triode Q10 is input to be at a low level, the E pin of the triode Q9 and the C pin of the triode Q10 are not conducted from the inside, so that the C pin of the triode Q9 is kept at a low level.

The other end of the resistor R8 is connected with the G2 pin of the field effect tube U4B, and the D2 pin of the field effect tube U4B is connected with the 2 nd pin of the motor current output interface CON 4. The S2 pin of the field effect transistor U4B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND. The resistor R6, the resistor R69 and the field effect transistor U4B control the fourth circuit, when the G2 pin of the field effect transistor U4B is input to be in a high level, the current is conducted, and after the current is input from the D2 pin of the field effect transistor U4B, the current flows to GND from the S2 pin of the field effect transistor U3B through the R69. When the G2 pin input of the field effect transistor U4B is at a low level, the current is not conducted, and the current does not flow.

Example 3

A motor bidirectional driving circuit comprises a current control signal input end, a current control signal conversion circuit, a current control signal amplifying circuit, a current control circuit, a current input end and a motor current output end. When the control signal of the first input end of the driving circuit is at a high level and the control signal of the second input end is at a low level, the interiors of the field effect tube U4A and the field effect tube U3B are not conducted, the interiors of the field effect tube U3A and the field effect tube U4B are conducted, current flows into the field effect tube U3A from a positive polarity power supply +12V and then is input through a first pin of a motor interface CON4, and further flows out from a second pin of the motor interface CON4 and then flows into the ground GND through the field effect tube U4B. When the control signal of the first input end is at a low level and the control signal of the second input end is at a high level, the field effect tube U4A and the field effect tube U3B are internally conducted, the field effect tube U3A and the field effect tube U4B are not internally conducted, current flows into the field effect tube U4A from a positive polarity power supply +12V and then is input through a first pin of a motor interface CON4, and further flows out from a second pin of the motor interface CON4, flows into the ground GND through the field effect tube U3B. When the control signal of the first input end is at a high level and the control signal of the second input end is at a high level, the interiors of the field effect tube U4A and the field effect tube U3B are not conducted, the interiors of the field effect tube U3A and the field effect tube U4B are not conducted, and no current passes through the motor interface CON 4.

The control signal of the first input end of the specific driving circuit is input to be high level, a current signal is input from the first input end, flows into the 2 nd pin of the triode Q2 and the 3 rd pin of the triode Q2 from inside to be conducted through the 1 st pin of the triode Q2 by the resistor R2, so that the amplified control signal is grounded GND, and the resistor R5 is always kept at low level. Because the resistor R5 keeps low level all the time, the amplified control signal current can not flow into the G1 pin of the field effect transistor U4A, so that the S1 pin of the field effect transistor U4A and the D1 pin of the field effect transistor U4A are not conducted, and the current can not flow, and at this time, the field effect transistor U4A is in a closed state.

The control signal of the first input end of the synchronous drive circuit is input to be high level, a current signal is input from the first input end, flows into the 2 nd pin of the triode Q2 and the 3 rd pin of the triode Q2 from inside through the 1 st pin of the triode Q8 by a resistor R33, enables the converted control signal to be grounded GND, enables the resistor R40 to keep low level all the time, and achieves the conversion of the control signal from high level to low level. Because the 2 nd pin of the triode Q2 and the 3 rd pin of the triode Q2 are conducted from the inside, the current flows in from the 2 nd pin of the triode Q2 after passing through the resistor R40 and flows out to the ground GND from the 3 rd pin of the triode Q2. The pin B of the triode Q9 connected with the other end of the resistor R40 always stores low level, no current flows in from the pin B of the triode Q9, the pin E of the triode Q9 and the pin C of the triode Q9 cannot be conducted, and no current flows out from the pin C of the triode Q9 after flowing in from the pin E of the triode Q9. No current flows from the C pin of transistor Q9 and no current flows from resistor R6 connected to the C pin of transistor Q9. The G2 pin of the field effect tube U3B connected with the other end of the resistor R6 also has no current flowing in, so that the D2 pin of the field effect tube U3B and the S2 pin of the field effect tube U3B are not conducted, and the current cannot flow, and the field effect tube U3B is in a closed state at the moment.

The control signal of the second input end of the synchronous driving circuit is low level, the current signal is not input from the second input end, the second input end is connected with one end of a resistor R14, and the other end of the resistor R14 is connected with the 1 st pin of a triode Q3. The current signal does not flow from the second input terminal into pin 1 of transistor Q3 via resistor R14, rendering pin 2 of transistor Q3 and pin 3 of transistor Q3 non-conductive from the inside. The 3 rd pin of the triode Q3 is connected with one end of the R45, the other end of the resistor R45 is connected with positive polarity power supply +12V, and the 2 nd pin of the triode Q3 and the 3 rd pin of the triode Q3 are not conducted from the inside.

The 2 nd pin of the triode Q3 is always in a high level, the level of a control signal is changed from 1.7V to 2.5V to 12V, the 2 nd pin of the triode Q3 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the G1 pin of the field effect tube U3A, so that the G1 pin of the field effect tube U3A stores the high level, the current of positive polarity power +12V flows into the field effect tube U3A from the G1 pin of the field effect tube U3A, the S1 pin of the field effect tube U3A and the D1 pin of the field effect tube U3A are internally conducted, the current of positive polarity power +12V flows out from the D1 pin of the field effect tube U3A after the S1 pin of the field effect tube U3A flows in, and the current flowing out from the D1 pin of the field effect tube U3A can only flow in from the 1 st pin of the motor interface CON4 because the field effect tube U3B is in a closed state.

The control signal of the second input end of the synchronous drive circuit is input to be low level, the current signal is not input from the second input end, the second input end is connected with one end of a resistor R32, and the other end of the resistor R32 is connected with the 1 st pin of a triode Q7. The current signal does not flow from the second input terminal into pin 1 of transistor Q7 via resistor R32, rendering pin 2 of transistor Q7 and pin 3 of transistor Q7 non-conductive from the inside. The 2 nd pin of the triode Q7 is connected with one end of a resistor R35, the other end of the resistor R35 is connected with one end of a resistor R31, the other end of the resistor R31 is connected with positive polarity power +12V, as the 2 nd pin of the triode Q7 and the 3 rd pin of the triode Q7 are not conducted from inside, the resistor R31 and the resistor R35 are kept at high level, the B pin of the triode Q10 is connected with one end of the resistor R31, the B pin of the triode Q10 is kept at high level, and current flows into the triode Q10 through the B pin of the triode Q10 by the resistor R31, so that the E pin of the triode Q10 and the C pin of the triode Q10 are conducted from inside. The E pin of Q10 is connected to positive polarity power +12V, so that the C pin of Q10 remains high, and the level of the current control signal is changed from 1.7V-2.5V to 12V. The C-th pin of the triode Q10 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with the G2 pin of the field effect tube U4B, so that the G2 pin of the field effect tube U4B stores high level, positive polarity power +12V current flows into the field effect tube U4B from the G1 pin of the field effect tube U4B, the D2 pin of the field effect tube U4B and the S2 pin of the field effect tube U4B are internally conducted, the current flows out from the S2 pin of the field effect tube U4B after flowing into the D2 pin of the field effect tube U4B, and the current flowing into the D2 pin of the field effect tube U4B only comes from the 2 nd pin of a motor interface CON4 because the field effect tube U4A is in a closed state. The current flowing in from the D2 pin of the field effect transistor U4B flows in from the D2 pin of the field effect transistor U4B and then flows out from the S2 pin of the field effect transistor U4B. The S2 pin of the fet U4B is connected to the resistor R69, and the other end of the resistor R69 is grounded GND, and the current flowing out of the S2 pin of the fet U4B flows into the ground GND via R69.

At this time, since the fet U4A and the fet U3B are in the off state, current cannot flow from the 2 nd pin of the motor interface CON4 to the 1 st pin of the motor interface CON4, and cannot flow from the fet U3B to the ground GND. The field effect transistor U3A and the field effect transistor U4B are in an on state, and current flows from the positive polarity power supply +12v through the field effect transistor U3A from the 1 st pin of the motor interface CON4, flows from the 2 nd pin of the motor interface CON4, and flows to the ground GND through the field effect transistor U4B through the resistor R69. The motor interface CON4 is in a forward conducting state.

The control signal of the second input end of the specific driving circuit is input to be high level, the current signal is input from the second input end, flows into the 2 nd pin of the triode Q3 and the 3 rd pin of the triode Q3 from inside to be conducted through the 1 st pin of the triode Q3 by the resistor R14, so that the amplified control signal is grounded GND, and the resistor R5 is always kept at low level. Because the resistor R7 keeps low level all the time, the amplified control signal current can not flow into the G1 pin of the field effect transistor U3A, so that the S1 pin of the field effect transistor U3A and the D1 pin of the field effect transistor U3A are not conducted, and the current can not flow, and at this time, the field effect transistor U3A is in a closed state.

The control signal of the second input end of the synchronous drive circuit is input to be high level, a current signal is input from the second input end, flows into the 2 nd pin of the triode Q7 and the 3 rd pin of the triode Q7 from inside through the 1 st pin of the triode Q7 by the resistor R32, enables the converted control signal to be grounded GND, enables the resistor R35 to keep low level all the time, and achieves the conversion of the control signal from high level to low level. Because the 2 nd pin of the triode Q7 and the 3 rd pin of the triode Q7 are conducted from the inside, the current flows in from the 2 nd pin of the triode Q7 after passing through the resistor R35 and flows out to the ground GND from the 3 rd pin of the triode Q7. The pin B of the triode Q10 connected with the other end of the resistor R35 always keeps low level, no current flows in from the pin B of the triode Q10, the pin E of the triode Q10 and the pin C of the triode Q10 cannot be conducted, and no current flows out from the pin C of the triode Q10 after flowing in from the pin E of the triode Q10. No current flows from the C pin of transistor Q10 and no current flows from resistor R8 connected to the C pin of transistor Q10. The G2 pin of the field effect tube U4B connected with the other end of the resistor R8 also has no current flowing in, so that the D2 pin of the field effect tube U4B and the S2 pin of the field effect tube U4B are not conducted, and the current cannot flow, and the field effect tube U4B is in a closed state at the moment.

The first input end of the synchronous driving circuit controls the signal to be low level, the current signal is not input from the first input end, the first input end is connected with one end of a resistor R2, and the other end of the resistor R2 is connected with the 1 st pin of a triode Q2. The current signal does not flow from the second input terminal into pin 1 of transistor Q2 via resistor R2, rendering pin 2 of transistor Q2 and pin 3 of transistor Q2 non-conductive from the inside. The 3 rd pin of the triode Q2 is connected with one end of the R3, the other end of the resistor R3 is connected with positive polarity power supply +12V, and the 2 nd pin of the triode Q2 and the 3 rd pin of the triode Q2 are not conducted from the inside. The 2 nd pin of the triode Q3 is always in a high level, the level of a control signal is changed from 1.7V-2.5V to 12V, the 2 nd pin of the triode Q3 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the G1 pin of the field effect tube U4A, so that the G1 pin of the field effect tube U4A stores the high level, the current of positive polarity power +12V flows into the field effect tube U4A from the G1 pin of the field effect tube U4A, the S1 pin of the field effect tube U4A and the D1 pin of the field effect tube U4A are conducted, the current of positive polarity power +12V flows out from the D1 pin of the field effect tube U4A after the S1 pin of the field effect tube U3A flows in, and the current flowing out from the D1 pin of the field effect tube U4A can only flow in from the 2 nd pin of the motor interface CON4 because the field effect tube U4B is in a closed state.

The control signal of the first input end of the synchronous drive circuit is input to be low level, the current signal is not input from the first input end, the first input end is connected with one end of a resistor R33, and the other end of the resistor R33 is connected with the 1 st pin of a triode Q8. The current signal does not flow from the second input terminal into pin 1 of transistor Q8 via resistor R33, rendering pin 2 of transistor Q8 and pin 3 of transistor Q8 non-conductive from the inside. The 2 nd pin of the triode Q8 is connected with one end of a resistor R40, the other end of the resistor R40 is connected with one end of a resistor R39, the other end of the resistor R39 is connected with positive polarity power +12V, as the 2 nd pin of the triode Q8 and the 3 rd pin of the triode Q8 are not conducted from inside, the resistor R40 and the resistor R39 keep high level, the B pin of the triode Q9 is connected with one end of the resistor R39, the B pin of the triode Q9 also keeps high level, and current flows into the triode Q9 through the B pin of the triode Q9 by the resistor R39, so that the E pin of the triode Q9 and the C pin of the triode Q9 are conducted from inside. The E pin of Q9 is connected to positive polarity power +12V, so that the C pin of Q9 remains high, and the level of the current control signal is changed from 1.7V-2.5V to 12V. The C-th pin of the triode Q9 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the G2 pin of the field effect tube U3B, so that the G2 pin of the field effect tube U3B stores high level, positive polarity power +12V current flows into the field effect tube U3B from the G1 pin of the field effect tube U3B, the D2 pin of the field effect tube U3B and the S2 pin of the field effect tube U3B are internally conducted, the current flows out from the S2 pin of the field effect tube U3B after flowing into the D2 pin of the field effect tube U3B, and the current flowing into the D2 pin of the field effect tube U3B only comes from the 1 st pin of a motor interface CON4 because the field effect tube U3A is in a closed state. The current flowing in from the D2 pin of the field effect transistor U3B flows in from the D2 pin of the field effect transistor U4B and then flows out from the S2 pin of the field effect transistor U3B. The S2 pin of the fet U3B is connected to the resistor R69, and the other end of the resistor R69 is grounded GND, and the current flowing out of the S2 pin of the fet U3B flows into the ground GND via R69.

At this time, since the fet U3A and the fet U4B are in the off state, current cannot flow from the 1 st pin of the motor interface CON4 to the 2 nd pin of the motor interface CON4, and cannot flow from the fet U4B to the ground GND. The field effect transistor U4A and the field effect transistor U3B are in an on state, and current flows from the positive polarity power supply +12v through the field effect transistor U4A from the 2 nd pin of the motor interface CON4, flows from the 1 st pin of the motor interface CON4, and flows into the ground GND through the field effect transistor U3B through the resistor R69. The motor interface CON4 is in a reverse conducting state.

The control signal of the second input end of the synchronous drive circuit is input to be high level, the current signal is input from the second input end, and flows into the 2 nd pin of the triode Q3 and the 3 rd pin of the triode Q3 from inside to be conducted through the 1 st pin of the triode Q3 by the resistor R14, so that the amplified control signal is grounded GND, and the resistor R5 is always kept at low level. Because the resistor R7 keeps low level all the time, the amplified control signal current can not flow into the G1 pin of the field effect transistor U3A, so that the S1 pin of the field effect transistor U3A and the D1 pin of the field effect transistor U3A are not conducted, and the current can not flow, and at this time, the field effect transistor U3A is in a closed state.

At this time, the field effect tube U3A, the field effect tube U4B, the field effect tube U4A and the field effect tube U3B are all in a closed state. The field effect tube U3A, the field effect tube U4B, the field effect tube U4A and the field effect tube U3B are not conducted, and current cannot pass through the field effect tube U3A, the field effect tube U4B, the field effect tube U4A and the field effect tube U3B. The motor interface CON4 also has no current passing therethrough, so that the motor interface CON4 is in an off state.

The above detailed description of embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model as claimed, but is merely representative of selected embodiments of the utility model.

Claims

1. A motor bidirectional drive circuit is characterized in that: the circuit comprises a current control signal input end, a current control signal conversion circuit, a current control signal amplifying circuit, a current control circuit and a current input end; the first input end of the current control signal is connected with the first amplifying circuit of the current control signal and the second converting circuit of the current control signal, the first amplifying circuit of the current control signal is connected with the second current control circuit, and the first converting circuit of the current control signal is connected with the second amplifying circuit of the current control signal and then is connected with the third current control circuit; the second input end of the current control signal is connected with the third amplifying circuit of the current control signal and the first converting circuit of the current control signal, the third amplifying circuit of the current control signal is connected with the first current control circuit, and the first converting circuit of the current control signal is connected with the fourth amplifying circuit of the current control signal and then is connected with the fourth circuit of the current control; the current input end is connected with the first current control circuit and the second current control circuit.

2. The motor bi-directional driving circuit according to claim 1, wherein: the network name of the current input end is positive polarity power supply +12V, the positive polarity power supply +12V is connected with one end of a capacitor C1 and one end of a capacitor C8, and the other end of the capacitor C1 and the other end of the capacitor C8 are grounded GND;

the network name of the first input end of the current control signal is UART1_TXD/GPIO_1, and UART1_TXD/GPIO_1 is connected with one end of a resistor R2 and one end of a resistor R33;

the network name of the second input end of the current control signal is UART1_RTS/GPIO_2, and UART1_RTS/GPIO_2 is connected with one end of a resistor R32 and one end of a resistor R14;

3. The motor bi-directional driving circuit according to claim 1, wherein: the resistor R2 is an input starting end of the control signal first amplifying circuit; one end of a resistor R2 is connected with the UART1 TXD/GPIO_1, and the 1 st pin of a triode Q2 at the other end of the resistor R2 is connected with one end of a resistor R37; the resistor R37 and the 3 rd pin of the triode Q2 are connected with the GND; the 2 nd pin of the triode Q2 is connected with one end of a resistor R3 and one end of a resistor R5, and the other end of the resistor R3 is connected with a positive polarity power supply +12V of a current input end.

4. The motor bi-directional driving circuit according to claim 1, wherein: resistor R5 is used as the starting end of a control input signal of the current control second circuit; one end of a resistor R5 is connected with the 2 nd pin of the Q2 of the triode and one end of a resistor R3, and the other end of the resistor R5 is connected with the G1 pin of the field effect transistor U4A; the S1 pin of the field effect tube U4A is connected with positive polarity power supply +12V, and the D1 pin of the field effect tube U4A is connected with the 2 nd pin of the motor current output interface motor interface CON 4.

5. The motor bi-directional driving circuit according to claim 1, wherein: resistor R33 is the input start end of the second conversion circuit of the current control signal; one end of a resistor R33 is connected with the UART1_TXD/GPIO_1, the other end of the resistor R33 is connected with a first pin of a triode Q8 and one end of a resistor R34, and the other end of the resistor R34 and a 3 rd pin of the triode Q8 are grounded GND; the 2 nd pin of the triode Q8 is connected with one end of a resistor R40.

6. The motor bi-directional driving circuit according to claim 1, wherein: one end of the resistor R40 is connected with the 2 nd pin of the triode Q8; the resistor R40 is used as a signal input starting end of the control signal second amplifying circuit; the other end of the resistor R40 is connected with one end of the resistor R39 and the pin B of the triode Q9; the other end of the resistor R39 and the E pin of the triode Q9 are connected with positive polarity power supply +12V, and the C pin of the triode Q9 and one end of the resistor R6.

7. The motor bi-directional driving circuit according to claim 1, wherein: resistor R6 is used as the input starting end of the current control third circuit; one end of a resistor R6 is connected with a pin C of a triode Q9, the other end of the resistor R6 is connected with a pin G2 of a field effect tube U3B, the 2 end of the resistor R6 is connected with a diode, and one end close to the field effect tube U3B is connected with the anode of the diode; the D2 pin of the field effect tube U3B is connected with the 1 st pin of the motor current output interface motor interface CON 4; the S2 pin of the field effect transistor U3B is connected with one end of a resistor R69, and the other end of the resistor R69 is grounded GND.

8. The motor bi-directional driving circuit according to claim 1, wherein: the resistor R14 is the input starting end of the control signal third amplifying circuit; one end of a resistor R14 is connected with a UART1_RTS/GPIO_2, and the 1 st pin of a triode Q3 at the other end of the resistor R14 is connected with one end of a resistor R38; the resistor R38 and the 3 rd pin of the triode Q3 are connected with GND; the 2 nd pin of the triode Q3 is connected with one end of a resistor R45 and one end of a resistor R7, and the other end of the resistor R45 is connected with a positive polarity power supply +12V of a current input end.

9. The motor bi-directional driving circuit according to claim 1, wherein: resistor R7 is used as the start end of the control input signal of the current control first circuit; the other end of the resistor R7 is connected with the G1 pin of the field effect transistor U3A; the S1 pin of the field effect tube U3A is connected with positive polarity power +12V, and the D1 pin of the field effect tube U3A is connected with the 1 st pin of the motor current output interface motor interface CON 4.

10. The motor bi-directional driving circuit according to claim 1, wherein: resistor R32 is the input starting end of the first conversion circuit of the current control signal; one end of a resistor R32 is connected with a UART1_RTS/GPIO_2, the other end of the resistor R32 is connected with a first pin of a triode Q7 and one end of a resistor R36, and the other end of the resistor R36 and a 3 rd pin of the triode Q7 are grounded GND; the 2 nd pin of the triode Q7 is connected with one end of a resistor R35;

the resistor R35 is used as a signal input starting end of a control signal fourth amplifying circuit; one end of a resistor R35 is connected with the 2 nd pin of the triode Q7; the other end of the resistor R35 is connected with one end of the resistor R31 and the pin B of the triode Q10; the other end of the resistor R31 and the E pin of the triode Q10 are connected with positive polarity power supply +12V, and the C pin of the triode Q10 and one end of the resistor R8;