Tolerant control of double-motor driven by five phase inverter for electrical haulage shearer

In consideration of working condition characteristics of multi-motor coordinated operation of electrical haulage shearer, a tolerant control method of double-motor driven by five phase inverter for electrical haulage shearer was put forward. The mathematical model of drive system of double-motor with five phase bridge arm for shearer under two-phase stationary coordinates was established, fundamental reason limited the highest speed of double-motor was expounded. Based on the analysis of inner link of three phase and five phase inverter system, zero sequence signal injection PWM modulation of five bridge arms inverter was deduced in details. The experimental results show that the method adopts method of zero sequence signal injection PWM modulation, and can realize high-performance independent control for double three-phase motor of shearer with only five phase bridge arm.