【摘要】 研究了逆变器供电的永磁同步电动机驱动系统在故障状态下的运行特性 ,仿真分析了PWM逆变器开关元件断路、短路故障工况下的电流及转矩波形 ,通过对故障状态下的电流及转矩波形特征的分析可进一步实现驱动系统的故障检测与诊断。更多还原

【Abstract】 The state-space theory based on mathematical model is used to simulate the permanent magnet synchronous motors supplied from PWM inverter under fault conditions This paper investigates the switch-on and switch-off failure of one switch,and switch-on failure of both transistors of a leg The simulation results shows that the fault characteristics are different with different fault conditions and this can be used to fault detect and diagnosis to the inverter fed motors更多还原