A forward series control system and method for multiple DC motors

Abstract

The invention discloses a multi-DC motor forward series control system and method, wherein 2*(n+1) IGBT modules are connected in series in pairs to form n+1 bridge arms; the n+1 bridge arms are connected in parallel with positive and negative poles of a DC power supply, and n DC motors which are serially connected in a forward manner are respectively connected in series with the n+1 bridge arms; the n DC motors are connected to a reference voltage synthesizer through two-stage PI controllers via a speed sensor, a current sensor and a speed adjustment module in sequence, and the reference voltage synthesizer is connected to n+1 phase inverters by a PWM pulse generating unit; the n+1 phase inverters are connected to the reference voltage synthesizer via current regulating modules and one-stage PI controllers, and are connected to the PWM pulse generating unit through the reference voltage synthesizer; and pulse control signals generated by the PWM pulse generating unit control the on / offof the 2*(n+1) IGBT modules to drive the n DC motors. The number of circuit elements is small, the structure is simple, the performance stability is reliable, and the wide use value is achieved.

Description

technical field [0001] The invention belongs to the technical field of motor systems and controls, and in particular relates to a forward series control system and method for multiple DC motors. Background technique [0002] With the improvement of people's living standards and the development of modern production and office automation, household appliances, industrial robots and other equipment are becoming more and more efficient, miniaturized and highly intelligent. As an important part of actuators, motors must With the characteristics of high precision, fast speed, and high efficiency, the application of DC motors has also grown rapidly. [0003] In specific applications, the DC motor should realize four motion states: forward electric, reverse electric, forward feedback braking and reverse feedback braking. Reversing the electromagnetic torque is generally referred to as the four-quadrant control of the DC motor. [0004] The four-quadrant control circuit of the DC m...

AI Technical Summary

Problems solved by technology

[0004] The four-quadrant control circuit of the DC motor in the prior art often has a complex structure, many functional modules, and is expensive, but its performance is not perfect. How to design a driving circuit with a simple structure and excellent performance is a constant challenge for those skilled in the art. Direction of the research

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