Motor running timing control circuit based on chips

Abstract

The invention relates to a motor running timing control circuit based on chips. The circuit comprises a five-pin toggle switch, a timing control circuit and a driving circuit, wherein the timing control circuit comprises a timer U2, capacitors C2, C3, C4 and C5, resistors R1, R3 and R5 and a slide resistor R5; the driving circuit comprises a chip U1, a triode Q1 and a diode D1. According to the motor running timing control circuit based on the chips, the timing control chip is a 555 timer, a control circuit in the motor current direction is formed by use of voltage change of pins 3 and 7 of the 555 timer, a motor driving chip is L9110S, has an H-bridge circuit inside and can drive a motor to rotate through larger current. Besides, by use of the reverse interception feature of the diode D1,a direction indicator lamp is rotated through the motor, and forward and reverse rotation of the motor can be observed directly.

Description

technical field [0001] The invention relates to the field of circuit control, in particular to a chip-based motor operation timing control circuit. Background technique [0002] In real life, some production machinery needs to rotate in two directions, so the motor is required to have the function of forward and reverse. At present, the commonly used method is to switch the motor windings to any two of the three power phase wires. The direction of the rotating magnetic field will be opposite to the original direction, and the direction of the rotor driven by it will also be reversed. In this way, the positive and negative rotation of the motor can be realized. The switch converts the contacts, but this method requires a special person to do it manually, and the person must control the time. Contents of the invention [0003] The object of the present invention is to provide a motor running timing control circuit based on a chip, which uses a timing control chip to control...

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to switch the motor windings to any two of the three power phase wires. The direction of the rotating magnetic field will be opposite to the original direction, and the direction of the rotor driven by it will also be reversed. In this way, the positive and negative rotation of the motor can be realized. The switch converts the contacts, but this method requires a special person to do it manually, and the person must control the time

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