DC push rod motor control circuit

Abstract

The utility model discloses a DC push rod motor control circuit comprising a full-bridge control circuit formed by a chip B1 and a chip B2, the chip B1 and the chip B2 are connected with a power supply, and the voltage output ends of the chip B1 and the chip B2 are respectively connected with the positive electrode and the negative electrode of a DC push rod motor. The signal input end of the chip B1 and the signal input end of the chip B2 are respectively connected with the signal output end of a microcontroller, and the signal output end of the chip B1 and the signal output end of the chip B2 are connected with the signal input end of the microcontroller. The DC push rod motor is strong in anti-interference capability, high in precision and low in cost, and can effectively guarantee normal operation of the DC push rod motor.

Description

Technical Field

[0001] This utility model is specifically a DC push rod motor control circuit, belonging to the technical field of oil pump control system for mixer trucks. Background Technology

[0002] Most DC motor controls on the market use the LMD18200 chip. Although this chip can ensure the normal operation of DC push rod motors, it has the problems of weak anti-interference ability and high price, which leads to increased enterprise costs and is not conducive to improving the economic benefits of enterprises. Therefore, there is an urgent need for a motor control circuit with strong anti-interference ability, low cost and high precision. Summary of the Invention

[0003] To address the problems existing in the background technology mentioned above, this utility model provides a DC push rod motor control circuit that has strong anti-interference ability, low cost and high precision.

[0004] To achieve the above objectives, this utility model provides a DC linear actuator motor control circuit, comprising a full-bridge control circuit composed of chip B1 and chip B2. Chip B1 and chip B2 are connected to a power supply. The voltage output terminals of chip B1 and chip B2 are respectively connected to the positive and negative terminals of the DC linear actuator motor. The signal input terminals of chip B1 and chip B2 are respectively connected to the signal output terminals of a microcontroller, and the signal output terminals of chip B1 and chip B2 are connected to the signal input terminals of the microcontroller.

[0005] Preferably, in some embodiments, pins 7 of chip B1 and chip B2 are connected to the power supply via inductor 3L1; pin 7 of chip B1 is grounded via capacitor 3C3; pin 3 of chip B1 is connected to the microcontroller's IO pin via series resistor R1; pin 2 of chip B1 is connected to the microcontroller's IO pin via series resistor 3R2; pin 6 of chip B1 is connected to the microcontroller's analog input pin; one end of capacitor 3C1 is connected to pin 6 of chip B1, and the other end is grounded; one end of resistor 3R3 is connected to pin 6 of chip B1, and the other end is grounded; pin 5 of chip B1 is connected to one end of capacitor C2 and resistor R4 respectively, and the other end of capacitor C2 and resistor R4 is grounded; pins 4 and 8 of chip B1 are connected in series to the positive terminal of the DC push rod motor.

[0006] Pin 7 of chip B2 is grounded through capacitor 3C12. Pin 3 of chip B2 is connected to the microcontroller's I / O pin via resistor 3R5. Pin 2 of chip B2 is connected to the microcontroller's I / O pin via resistor 3R6. Pin 6 of chip B2 is connected to the microcontroller's analog input pin. One end of capacitor 3C8 and resistor 3R7 is connected to pin 6 of chip B2, and the other end is grounded. Pin 5 of chip B2 is connected to one end of resistor 3R8 and capacitor 3C9, and the other end of resistor 3R8 and capacitor 3C9 is grounded. Pins 4 and 8 of chip B2 are connected in series to the negative terminal of the DC linear actuator motor.

[0007] Preferably, in some embodiments, both chip B1 and chip B2 are BTN8962TA chips, and the microcontroller is a single-chip microcomputer.

[0008] Compared with the prior art, this utility model builds a DC linear actuator motor control circuit around two BTN8962TA chips. It is a dual-bridge motor control circuit with strong anti-interference ability, high precision and low cost, which effectively ensures the normal operation of the DC linear actuator motor and thus ensures the stability of the DC linear actuator motor operation. Attached Figure Description

[0009] Figure 1 This is a circuit block diagram of the present invention;

[0010] Figure 2 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] like Figure 1 As shown, this utility model discloses a DC linear actuator motor control circuit, comprising a full-bridge control circuit composed of chips B1 and B2. Chips B1 and B2 are connected to a power supply. The voltage output terminals of chips B1 and B2 are respectively connected to the positive and negative terminals of the DC linear actuator motor. The signal input terminals of chips B1 and B2 are respectively connected to the signal output terminals of a microcontroller, and the signal output terminals of chips B1 and B2 are connected to the signal input terminals of the microcontroller. The microcontroller is a single-chip microcomputer, model MC9S12XET.

[0013] This embodiment uses chips B1 and B2 to form a full-bridge control circuit, which outputs to the positive and negative terminals of the DC push rod motor, respectively. (Refer to...) Figure 2 As shown, the specific circuit is as follows:

[0014] The 7 pins of chips B1 and B2 are connected to the power supply through inductor 3L1. Specifically, the 24V power supply passes through inductor 3L1 and supplies power to the 7 pins (VS) of chips B1 and B2 respectively. The 7 pin of chip B1 is grounded through capacitor 3C3. The 3 pin (INH) of chip B1 is connected to the microcontroller's I / O pin through series resistor R1. The 2 pin (IN) of chip B1 is connected to the microcontroller's I / O pin through series resistor 3R2. The 6 pin (IS) of chip B1 is connected to the microcontroller's analog pin. One end of capacitor 3C1 is connected to the 6 pin of chip B1, and the other end is grounded. One end of resistor 3R3 is connected to the 6 pin of chip B1, and the other end is grounded. The 5 pin (SR) of chip B1 is connected to one end of capacitor C2 and resistor R4 respectively, and the other end of capacitor C2 and resistor R4 is grounded. The 4 pins and 8 pins of chip B1 are connected in series to the positive terminal of the DC push rod motor. The 1 pin (GND) of chip B1 is grounded.

[0015] Pin 7 (VS) of chip B2 is grounded through capacitor 3C12; pin 3 (INH) of chip B2 is connected to the microcontroller's I / O pin via resistor 3R5; pin 2 (IN) of chip B2 is connected to the microcontroller's I / O pin via resistor 3R6; pin 6 (IS) of chip B2 is connected to the microcontroller's analog input pin; one end of capacitor 3C8 and resistor 3R7 is connected to pin 6 of the fine disk B2, and the other end is grounded; pin 5 (SR) of chip B2 is connected to one end of resistor 3R8 and capacitor 3C9 respectively, and the other end of resistor 3R8 and capacitor 3C9 is grounded; pins 4 and 8 of chip B2 are connected in series to the negative terminal of the DC linear actuator motor; pin 1 (GND) of chip B2 is grounded.

[0016] In this embodiment, both chip B1 and chip B2 are BTN8962TA chips (hereinafter referred to as "8962 chips"). The 8962 chip is suitable for integrated high-current half-bridge control motor drive applications. It includes a P-channel high-side MOSFET and an N-channel low-side MOSFET, thereby minimizing EMI. The chip has logic level input, current diagnostics, speed adjustment, and overheat, overvoltage, overcurrent, and short-circuit protection.

[0017] Operating Logic: When an input signal is input to the microcontroller, the microcontroller's I / O pins output a high level to pin 2 (IN) of the two 8962 chips. Pins 4 and 8 of the two 8962 chips then output 24V to power the DC linear actuator motor, which operates at the same voltage as pin 7 (VS). When the current from the 8962 chip is too low or too high, it outputs a signal to the microcontroller's analog pin via pin 6 (IS). Upon receiving this signal, the microcontroller stops outputting a high level to pin 2 of the 8962 chip, thus preventing pins 4 and 8 from supplying power to the DC linear actuator motor. This effectively prevents damage to the DC linear actuator motor due to overload or other abnormal conditions, thereby extending its lifespan.

[0018] This invention revolves around two BTN8962TA chips to build a DC linear actuator motor control circuit. It has strong anti-interference ability, high precision, and low cost, effectively ensuring the normal operation of the DC linear actuator motor and thus ensuring the stability of its operation.

Claims

1. A DC linear actuator motor control circuit, characterized in that, The circuit includes a full-bridge control circuit consisting of chips B1 and B2. Chips B1 and B2 are connected to a power supply. The voltage output terminals of chips B1 and B2 are respectively connected to the positive and negative terminals of a DC push rod motor. The signal input terminals of chips B1 and B2 are respectively connected to the signal output terminals of a microcontroller. The signal output terminals of chips B1 and B2 are also connected to the signal input terminals of the microcontroller.

2. The DC linear actuator motor control circuit according to claim 1, characterized in that, Pins 7 of chips B1 and B2 are connected to the power supply via inductor 3L1; pin 7 of chip B1 is grounded via capacitor 3C3; pin 3 of chip B1 is connected to the microcontroller's I / O pin via series resistor R1; pin 2 of chip B1 is connected to the microcontroller's I / O pin via series resistor 3R2; pin 6 of chip B1 is connected to the microcontroller's analog input pin; one end of capacitor 3C1 is connected to pin 6 of chip B1, and the other end is grounded; one end of resistor 3R3 is connected to pin 6 of chip B1, and the other end is grounded; pin 5 of chip B1 is connected to one end of capacitor C2 and resistor R4 respectively, and the other end of capacitor C2 and resistor R4 is grounded; pins 4 and 8 of chip B1 are connected in series to the positive terminal of the DC push rod motor. Pin 7 of chip B2 is grounded through capacitor 3C12. Pin 3 of chip B2 is connected to the microcontroller's I / O pin via resistor 3R5. Pin 2 of chip B2 is connected to the microcontroller's I / O pin via resistor 3R6. Pin 6 of chip B2 is connected to the microcontroller's analog input pin. One end of capacitor 3C8 and resistor 3R7 is connected to pin 6 of chip B2, and the other end is grounded. Pin 5 of chip B2 is connected to one end of resistor 3R8 and capacitor 3C9, and the other end of resistor 3R8 and capacitor 3C9 is grounded. Pins 4 and 8 of chip B2 are connected in series to the negative terminal of the DC linear actuator motor.

3. The DC linear actuator motor control circuit according to claim 1, characterized in that, Both chip B1 and chip B2 are BTN8962TA chips, and the microcontroller is a single-chip microcomputer.

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