A driver circuit based on a gate driver

Abstract

The utility model provides a kind of driver circuit based on gate driver belongs to driver circuit technical field, including gate drive circuit and Mos pipe switch output circuit capacitance.The utility model, through two pieces of Mos pipe composition bridge type drive structure, can realize the positive and negative rotation control of motor, applicable to the scene needing bidirectional motion, while bridge type drive structure can efficiently convert electric energy into mechanical energy, reduce energy loss, and by adjusting the duty ratio of PWM signal, the stability and reliability of the circuit can be accurately controlled the rotational speed and torque of motor is improved, gate drive chip provides electrical isolation function, isolates control signal from power output, can prevent high-voltage power circuit from interfering or damaging low-voltage control circuit, improve the safety of system, through the combination of gate drive chip and Mos pipe, efficient, accurate motor control is realized.

Description

Technical Field

[0001] This utility model relates to the field of driver circuit technology, and more specifically, to a driver circuit based on a gate driver. Background Technology

[0002] In a remote control system for special robots, the motor drive circuit is a key component for realizing robot motion control.

[0003] In existing technologies, traditional motor drive circuits typically employ simple switching circuits or linear drive circuits, which suffer from problems such as low efficiency, slow response speed, and low control precision. How to invent a gate-driven driver circuit to solve these problems has become a pressing issue for those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a driver circuit based on a gate driver, which aims to solve the problems of low efficiency, slow response speed and low control accuracy that traditional motor drive circuits usually use simple switching circuits or linear drive circuits.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a driver circuit based on a gate driver, including a gate driver circuit and a MOSFET switching output circuit. The gate driver circuit includes a driver chip U6 and capacitors C33, C34 and D7, and a driver chip U8 and capacitors C38, C40 and D11.

[0007] The MOSFET switch output circuit includes MOSFETs Q2 and Q3, resistors R22 and R23, diodes D8 and D9, MOSFETs Q4 and Q5, resistors R33 and R35, diodes D12 and D13. Pin 4 of MOSFET Q2 is electrically connected to pin 7 of driver chip U6; pin 4 of MOSFET Q3 is electrically connected to pin 5 of driver chip U6; pin 4 of MOSFET Q4 is electrically connected to pin 7 of driver chip U8; and pin 4 of MOSFET Q5 is electrically connected to pin 5 of driver chip U8.

[0008] Preferably, pin 2 of the driver chip U6 is connected to the motor PWM control signal, pin 3 of the driver chip U6 is connected to the motor enable signal, pin 1 of the driver chip U6 is connected to the power supply and capacitor C38, the negative terminal of the capacitor C38 is grounded, the positive terminal of the capacitor C38 is connected to diode D17, the other end of the diode D17 is connected to pin 8 of the driver chip U6, pin 6 of the driver chip U6 is connected to the positive terminal of the motor, and capacitor C34 is connected between pin 6 of the driver chip U6 and diode D7.

[0009] Preferably, pin 2 of the driver chip U8 is connected to the motor PWM control signal, pin 3 of the driver chip U8 is connected to the motor enable signal, pin 1 of the driver chip U8 is connected to the power supply and capacitor C38, the positive terminal of the capacitor C38 is connected to diode D11, the other end of the diode D11 is connected to pin 8 of the driver chip U8, pin 6 of the driver chip U8 is connected to the negative terminal of the motor, and capacitor C40 is connected between pin 6 of the driver chip U8 and diode D11.

[0010] Preferably, the resistor R22 and the capacitor D8 are connected in parallel, pins 1, 2 and 3 of the MOSFET Q2 are all connected to pin 6 of the driver chip U6, and pins 5, 6, 7, 8 and 9 of the MOSFET Q2 are all connected to the power MOSFET.

[0011] Preferably, the resistor R23 and capacitor D9 are connected in parallel, pins 1, 2 and 3 of the MOSFET Q3 are connected to resistor R27, one end of resistor R27 is grounded, and pins 5, 6, 7, 8 and 9 of the MOSFET Q3 are all connected to pin 6 of the driver chip U6.

[0012] Preferably, the resistor R33 and capacitor D12 are connected in parallel, pins 1, 2 and 3 of the MOSFET Q4 are all connected to pin 6 of the driver chip U8, and pins 5, 6, 7, 8 and 9 of the MOSFET Q4 are all connected to the power MOSFET.

[0013] Preferably, the resistor R35 and the capacitor D13 are connected in parallel, the pins 1, 2 and 3 of the MOSFET Q5 are connected to the resistor R27, and the pins 5, 6, 7, 8 and 9 of the MOSFET Q5 are all connected to pin 6 of the driver chip U8.

[0014] The beneficial effects of this utility model are:

[0015] By using two MOSFETs to form a bridge drive structure, controlling the positive and negative outputs respectively, the forward and reverse rotation of the motor can be achieved. By controlling the switching state of the MOSFETs, the direction of the current can be changed, thereby controlling the rotation direction of the motor. This enables forward and reverse motor control, suitable for scenarios requiring bidirectional motion. Simultaneously, the bridge drive structure efficiently converts electrical energy into mechanical energy, reducing energy loss. Furthermore, by adjusting the duty cycle of the PWM signal, the motor speed and torque can be precisely controlled. PWM control reduces energy loss and improves system efficiency. The PWM signal can be quickly adjusted, improving the system's dynamic performance. Isolation design reduces noise and interference, improving circuit stability and reliability. The gate driver chip provides electrical isolation, separating the control signal from the power output, preventing high-voltage power circuits from interfering with or damaging low-voltage control circuits, thus improving system safety. Through the combination of the gate driver chip and MOSFETs, efficient and precise motor control is achieved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart of a bridge driver based on a gate driver driver according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of a bridge driver circuit based on a gate driver, provided by an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example, refer to Figures 1-2A driver circuit based on a gate driver includes a gate driver circuit and a MOSFET switching output circuit. The gate driver circuit includes a driver chip U6 and capacitors C33, C34 and D7, and a driver chip U8 and capacitors C38, C40 and D11.

[0021] The MOSFET switch output circuit includes MOSFETs Q2 and Q3, resistors R22 and R23, diodes D8 and D9, MOSFETs Q4 and Q5, resistors R33 and R35, diodes D12 and D13. Pin 4 of MOSFET Q2 is electrically connected to pin 7 of driver chip U6, pin 4 of MOSFET Q3 is electrically connected to pin 5 of driver chip U6, pin 4 of MOSFET Q4 is electrically connected to pin 7 of driver chip U8, and pin 4 of MOSFET Q5 is electrically connected to pin 5 of driver chip U8.

[0022] Furthermore; pin 2 of driver chip U6 is connected to the motor PWM control signal, pin 3 of driver chip U6 is connected to the motor enable signal, pin 1 of driver chip U6 is connected to the power supply and capacitor C38, the negative terminal of capacitor C38 is grounded, the positive terminal of capacitor C38 is connected to diode D17, the other end of diode D17 is connected to pin 8 of driver chip U6, pin 6 of driver chip U6 is connected to the positive terminal of the motor, capacitor C34 is connected between pin 6 of driver chip U6 and diode D7, pin 2 of driver chip U8 is connected to the motor PWM control signal, pin 3 of driver chip U8 is connected to the motor enable signal, pin 1 of driver chip U8 is connected to the power supply and capacitor C38, the positive terminal of capacitor C38 is connected to diode D11, the other end of diode D11 is connected to pin 8 of driver chip U8, pin 6 of driver chip U8 is connected to the negative terminal of the motor, capacitor C40 is connected between pin 6 of driver chip U8 and diode D11;

[0023] The resistor R22 and capacitor D8 are connected in parallel. Pins 1, 2, and 3 of MOSFET Q2 are all connected to pin 6 of driver chip U6. Pins 5, 6, 7, 8, and 9 of MOSFET Q2 are all connected to the power MOSFET. The resistor R23 and capacitor D9 are connected in parallel. Pins 1, 2, and 3 of MOSFET Q3 are connected to resistor R27, one end of which is grounded. Pins 5, 6, 7, 8, and 9 of MOSFET Q3 are all connected to the power MOSFET U6. Pin 6 is connected. Resistor R33 and capacitor D12 are connected in parallel. Pins 1, 2, and 3 of MOSFET Q4 are all connected to pin 6 of driver chip U8. Pins 5, 6, 7, 8, and 9 of MOSFET Q4 are all connected to power MOSFET. Resistor R35 and capacitor D13 are connected in parallel. Pins 1, 2, and 3 of MOSFET Q5 are connected to resistor R27. Pins 5, 6, 7, 8, and 9 of MOSFET Q5 are all connected to pin 6 of driver chip U8.

[0024] It should be noted that by using two MOSFETs to form a bridge drive structure, controlling the positive and negative outputs respectively, the forward and reverse rotation of the motor can be achieved. By controlling the switching state of the MOSFETs, the direction of the current can be changed, thereby controlling the rotation direction of the motor. This enables forward and reverse motor control, suitable for scenarios requiring bidirectional motion. Simultaneously, the bridge drive structure efficiently converts electrical energy into mechanical energy, reducing energy loss. Furthermore, by adjusting the duty cycle of the PWM signal, the motor speed and torque can be precisely controlled. PWM control reduces energy loss and improves system efficiency. The PWM signal can be quickly adjusted, improving the system's dynamic performance. Isolation design reduces noise and interference, improving circuit stability and reliability. The gate driver chip provides electrical isolation, separating the control signal from the power output, preventing high-voltage power circuits from interfering with or damaging low-voltage control circuits, thus improving system safety. Through the combination of the gate driver chip and MOSFETs, efficient and precise motor control is achieved.

[0025] The working principle of this gate driver-based driver circuit:

[0026] The gate driver chip receives control signals from the MCU and converts them into gate signals suitable for driving the MOSFETs. The gate driver chip provides electrical isolation, ensuring safe isolation between the control signals and the power output. The MOSFET switching output circuit consists of two MOSFETs connected to the output terminals of the gate driver chip, controlling the positive and negative outputs. The switching action of the MOSFETs is controlled by the gate driver chip, achieving efficient power conversion and motor drive. The input terminal of the gate driver chip is connected to the MCU, and the output terminal is connected to the gate of the MOSFET. The source and drain of the MOSFET are connected to the power supply and load, respectively, forming a complete drive circuit. Through the combination of the gate driver chip and the MOSFETs, efficient and precise motor control is achieved.

[0027] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A driver circuit based on a gate driver, comprising a gate driving circuit and a MOSFET switching output circuit, characterized in that, The gate drive circuit includes a drive chip U6 and capacitors C33, C34 and D7, and a drive chip U8 and capacitors C38, C40 and D11. The MOSFET switch output circuit includes MOSFETs Q2 and Q3, resistors R22 and R23, diodes D8 and D9, MOSFETs Q4 and Q5, resistors R33 and R35, diodes D12 and D13. Pin 4 of MOSFET Q2 is electrically connected to pin 7 of driver chip U6, pin 4 of MOSFET Q3 is electrically connected to pin 5 of driver chip U6, pin 4 of MOSFET Q4 is electrically connected to pin 7 of driver chip U8, and pin 4 of MOSFET Q5 is electrically connected to pin 5 of driver chip U8.

2. The driver circuit based on a gate driver according to claim 1, characterized in that, Pin 2 of the driver chip U6 is connected to the motor PWM control signal, pin 3 of the driver chip U6 is connected to the motor enable signal, pin 1 of the driver chip U6 is connected to the power supply and capacitor C38, the negative terminal of the capacitor C38 is grounded, the positive terminal of the capacitor C38 is connected to diode D17, the other end of the diode D17 is connected to pin 8 of the driver chip U6, pin 6 of the driver chip U6 is connected to the positive terminal of the motor, and capacitor C34 is connected between pin 6 of the driver chip U6 and diode D7.

3. A driver circuit based on a gate driver according to claim 2, characterized in that, Pin 2 of the driver chip U8 is connected to the motor PWM control signal, pin 3 of the driver chip U8 is connected to the motor enable signal, pin 1 of the driver chip U8 is connected to the power supply and capacitor C38, the positive terminal of the capacitor C38 is connected to diode D11, the other end of the diode D11 is connected to pin 8 of the driver chip U8, pin 6 of the driver chip U8 is connected to the negative terminal of the motor, and capacitor C40 is connected between pin 6 of the driver chip U8 and diode D11.

4. A driver circuit based on a gate driver according to claim 3, characterized in that, The resistor R22 and capacitor D8 are connected in parallel. Pins 1, 2 and 3 of the MOSFET Q2 are all connected to pin 6 of the driver chip U6. Pins 5, 6, 7, 8 and 9 of the MOSFET Q2 are all connected to the power MOSFET.

5. A driver circuit based on a gate driver according to claim 4, characterized in that, The resistor R23 and capacitor D9 are connected in parallel. Pins 1, 2 and 3 of the MOSFET Q3 are connected to resistor R27. One end of resistor R27 is grounded. Pins 5, 6, 7, 8 and 9 of the MOSFET Q3 are all connected to pin 6 of the driver chip U6.

6. A driver circuit based on a gate driver according to claim 5, characterized in that, The resistor R33 and capacitor D12 are connected in parallel. Pins 1, 2 and 3 of the MOSFET Q4 are all connected to pin 6 of the driver chip U8. Pins 5, 6, 7, 8 and 9 of the MOSFET Q4 are all connected to the power MOSFET.

7. A driver circuit based on a gate driver according to claim 6, characterized in that, The resistor R35 and capacitor D13 are connected in parallel. Pins 1, 2 and 3 of the MOSFET Q5 are connected to resistor R27. Pins 5, 6, 7, 8 and 9 of the MOSFET Q5 are all connected to pin 6 of the driver chip U8.

Images