An h-bridge dc motor drive circuit

Abstract

The application provides an H-bridge direct current motor driving circuit, and relates to the field of driving circuits.The H-bridge direct current motor driving circuit comprises an MCU and a MOS transistor driving circuit.The MOS transistor driving circuit comprises MOS transistors Q1, Q2, Q3, Q4, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12.The utility model adopts four MOS transistors for driving, controls the conduction and disconnection of the MOS transistors Q1, Q2, Q3 and Q4 through the MCU, and thus the forward and reverse rotation of the motor can be controlled.The MCU can avoid the simultaneous conduction of the MOS transistors (Q1 and Q2, Q3 and Q4) on the same side, so that the loss caused by the short circuit of the power supply to the ground is avoided.The utility model has the advantages of simple driving circuit, high reliability and low noise.

Description

Technical Field

[0001] This application relates to the field of drive circuits, and more specifically, to an H-bridge DC motor drive circuit. Background Technology

[0002] DC motor control is simple; simply energizing the positive and negative terminals of the motor is enough to make it work, and changing the direction of energization controls the forward and reverse rotation. In industrial control, DC motors are typically controlled using relays for forward and reverse rotation. This method is space-consuming and noisy, making it unsuitable for applications with limited space or strict noise control requirements. Summary of the Invention

[0003] The purpose of this application is to provide an H-bridge DC motor drive circuit that can solve the above-mentioned technical problems.

[0004] This application provides an H-bridge DC motor drive circuit, including an MCU and a MOSFET drive circuit. The MOSFET drive circuit includes MOSFETs Q1, Q2, Q3, and Q4, and resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12. The gate (G) of MOSFET Q1 is connected to the nineteenth interface of the MCU through resistors R1 and R2. The gate (G) of MOSFET Q2 is connected to the source (S) of MOSFET Q1 through resistor R3. The source (S) of MOSFET Q1 is connected to the drain (D) of MOSFET Q2. The gate (G) of MOSFET Q2 is connected to the eleventh interface of the MCU through resistors R4 and R5. The gate (G) of MOSFET Q2 is connected to the... The source (S) of MOSFET Q2 is connected to the source (S) of MOSFET Q4. The gate (G) of MOSFET Q3 is connected to the sixteenth interface of the MCU through resistors R7 and R8. The drain (D) of MOSFET Q3 is connected to the drain (D) of MOSFET Q1. The source (S) of MOSFET Q3 is connected to the drain (D) of MOSFET Q4. The gate (G) of MOSFET Q4 is connected to the tenth interface of the MCU through resistors R10 and R11. The drains (D) of MOSFET Q1 are connected to the power supply. The sources (S) of MOSFET Q2 and Q2 are both grounded. The sources (S) of MOSFET Q1 and the drains (D) of MOSFET Q2 are both connected to one end of the motor. The sources (S) of MOSFET Q3 and the drains (D) of MOSFET Q4 are both connected to the other end of the motor.

[0005] Preferably, the MCU is model EG2133.

[0006] Preferably, the resistance values ​​of resistors R1, R2, R4, R5, R7, R8, R10, and R11 are all 51Ω ± 5%.

[0007] Preferably, the resistance values ​​of resistors R3, R6, R9, and R12 are all 10kΩ ± 1%.

[0008] The beneficial effects of this utility model are:

[0009] This utility model provides an H-bridge DC motor drive circuit, including an MCU and a MOSFET drive circuit. The MOSFET drive circuit includes MOSFETs Q1, Q2, Q3, and Q4, and resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12. This utility model uses four MOSFETs for driving the motor. The MCU controls the on and off states of MOSFETs Q1, Q2, Q3, and Q4, thereby controlling the forward and reverse rotation of the motor. The MCU also prevents MOSFETs on the same side (Q1 and Q2, Q3 and Q4) from being simultaneously turned on, which could cause a short circuit to ground and damage. This utility model's drive circuit is simple, highly reliable, and has low noise. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a circuit diagram showing the connection of the MOS transistor in this utility model;

[0012] Figure 2 This is the MCU circuit diagram of this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0015] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0016] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] like Figure 1-2As shown, an H-bridge DC motor drive circuit includes an MCU and a MOSFET drive circuit. The MOSFET drive circuit includes MOSFETs Q1, Q2, Q3, and Q4, and resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12. The gate (G) of MOSFET Q1 is connected to the nineteenth interface of the MCU through resistors R1 and R2, respectively. The gate (G) of MOSFET Q2... The gate (G) of MOSFET Q1 is connected to the source (S) of MOSFET Q1 via resistor R3. The source (S) of MOSFET Q1 is connected to the drain (D) of MOSFET Q2. The gate (G) of MOSFET Q2 is connected to the eleventh interface of the MCU via resistors R4 and R5. The gate (G) of MOSFET Q2 is connected to the source (S) of MOSFET Q2 via resistor R6. The source (S) of MOSFET Q2 is connected to the source (S) of MOSFET Q4. The gate (G) of MOSFET Q3 is connected to the MCU via resistors R7 and R8. The sixteenth interface of U is connected, the drain (D) of MOSFET Q3 is connected to the drain of MOSFET Q1, the source (S) of MOSFET Q3 is connected to the drain of MOSFET Q4, the gate (G) of MOSFET Q4 is connected to the tenth interface of the MCU through resistors R10 and R11, the drains of MOSFET Q1 and Q2 are connected to the power supply, and the sources (S) of MOSFET Q2 and Q3 are both grounded. The drain (D) terminals of the MOSFETs are connected to one end of the motor, and the source (S) terminal of MOSFET Q3 and the drain (D) terminal of MOSFET Q4 are connected to the other end of the motor. This invention uses four MOSFETs for driving the motor. The MCU controls the conduction and disconnection of MOSFETs Q1, Q2, Q3, and Q4 to achieve forward and reverse rotation control of the motor. The MCU can also prevent MOSFETs (Q1 and Q2, Q3 and Q4) on the same side from conducting simultaneously, thus avoiding power supply short circuit to ground and losses. The driving circuit of this invention is simple, highly reliable, and has low noise.

[0020] In this embodiment, the MCU is model EG2133.

[0021] In this embodiment, the resistance values ​​of resistors R1, R2, R4, R5, R7, R8, R10, and R11 are all 51Ω ± 5%, and the resistance values ​​of resistors R3, R6, R9, and R12 are all 10kΩ ± 1%.

[0022] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An H-bridge DC motor drive circuit, characterized in that: The system includes an MCU and a MOSFET driver circuit. The MOSFET driver circuit includes MOSFETs Q1, Q2, Q3, and Q4, and resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12. The gate (G) of MOSFET Q1 is connected to the nineteenth interface of the MCU through resistors R1 and R2. The gate (G) of MOSFET Q2 is connected to the source (S) of MOSFET Q1 through resistor R3. The source (S) of MOSFET Q1 is connected to the drain (D) of MOSFET Q2. The gate (G) of MOSFET Q2 is connected to the eleventh interface of the MCU through resistors R4 and R5. The gate (G) of MOSFET Q2 is connected to the... The source (S) of MOSFET Q2 is connected to the source (S) of MOSFET Q4. The gate (G) of MOSFET Q3 is connected to the sixteenth interface of the MCU through resistors R7 and R8. The drain (D) of MOSFET Q3 is connected to the drain (D) of MOSFET Q1. The source (S) of MOSFET Q3 is connected to the drain (D) of MOSFET Q4. The gate (G) of MOSFET Q4 is connected to the tenth interface of the MCU through resistors R10 and R11. The drains (D) of MOSFET Q1 are connected to the power supply. The source (S) of MOSFET Q2 and the source (S) of MOSFET Q2 are both grounded. The source (S) of MOSFET Q1 and the drain (D) of MOSFET Q2 are both connected to one end of the motor. The source (S) of MOSFET Q3 and the drain (D) of MOSFET Q4 are both connected to the other end of the motor.

2. The H-bridge DC motor drive circuit according to claim 1, characterized in that: The MCU model is EG2133.

3. The H-bridge DC motor drive circuit according to claim 1, characterized in that: The resistance values ​​of resistors R1, R2, R4, R5, R7, R8, R10, and R11 are all 51Ω ± 5%.

4. The H-bridge DC motor drive circuit according to claim 1, characterized in that: The resistance values ​​of resistors R3, R6, R9, and R12 are all 10kΩ ± 1%.

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