Driver

Abstract

The invention relates to a driver. The driver comprises a current-loop PID (proportion integration differentiation) operation module, a signal change module, a PWM (pulse width modulation) generationmodule, a circuit protection module, an interlocking protection module and a power amplification module which are connected in sequence. Preset signals and current signals fed back by a direct-currentmotor are subjected to PID operation, and control signals are output; the control signals are subjected to proportional operation according to triangular wave signals to output adjustment signals; PWM signals are output; any internal high-speed optocoupler is closed according to the PWM signals and the externally input signals; the PWM signals are amplified to drive the direct-current motor to rotate. By the driver, the proportional operation is performed in the current-loop PID operation module, so that system response can be improved, tracking errors can be reduced, static errors can be eliminated, and dynamic response is accelerated.

Description

technical field [0001] The invention belongs to the field of DC motor control, in particular to a driver. Background technique [0002] At present, there are two main ideas in terms of DC motor drivers: one is to use digital circuits to collect the feedback current of the motor through the microprocessor, complete the closed-loop algorithm in the microprocessor, and then control the motor through the power amplifier circuit, but this This idea is because the DC motor is greatly disturbed in many occasions, and the noise is often very large. If the acquisition effect of the microprocessor is not good, the problem of inaccurate current acquisition often occurs, and it is difficult to improve the accuracy; Another way of thinking is to build a current loop PID operation through an analog circuit, then design a bootstrap circuit, design a dead zone circuit, connect a power amplifier chip and other operations. This solution achieves good results, but the circuit is very complicat...

AI Technical Summary

Problems solved by technology

[0003] The technical problems to be solved by the present invention are: the DC motors currently used have problems such as large disturbance, large noise, inaccurate acquisition, and low precision; or complex circuits, high development costs, and poor versatility for DC motors with different requirements.

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