A fault-tolerant control method and control system for multiple direct current motors in series

Abstract

The invention discloses a multi-DC motor series fault-tolerant control method and a control system. The control system includes n DC motors connected in series, n PI controllers, and a reference torque calculation unit, and (n+1 ) torque hysteresis comparison controller, and a PWM pulse width modulation unit, and (n+1) phase voltage source type fault-tolerant inverter, and torque calculation, fault detection and fault-tolerant control strategy unit and permanent magnet synchronous motor A current detection sensor, a rotational speed position sensor, and a DC power supply. The control system of the present invention can greatly reduce the complexity of the circuit, making the control circuit more tidy. The control method of the present invention introduces a fault-tolerant control method while reducing the PI controller, so as to avoid circuit damage caused by a motor failure. That is, when the motor fails, it does not affect the work of other motors, which improves work efficiency and saves costs; at the same time, fuses are introduced to ensure circuit safety.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a multi-DC motor series fault-tolerant control method and a control system. Background technique [0002] With the advancement of society and the advancement of technology, more and more high-risk and tiring tasks are handed over to automatic equipment, most of which are driven by motors. At the same time, due to the good speed regulation performance of DC motors, the wider range of speed regulation than AC motors, and the smooth speed regulation, DC motors are widely used in industrial equipment. In addition, the hardware circuit of the hysteresis comparison controller is relatively simple, and the real-time control performance is excellent. The hysteresis control of multiple DC motors is a motor control method developed on the basis of single DC motor control. It comprehensively considers the parameters of motor control such as current, torque, speed, and vol...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-DC motor series fault-tolerant control method and control system to solve the problems in the prior art that the real-time performance of motor control is poor, the control hardware circuit is relatively complicated and difficult to design, and the control effect is general.

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