一种基于电流矢量轨迹的PWM逆变器故障诊断方法

Fault Diagnose on a PWM Inverter Based on Current Trajectories

本文介绍了一种对PWM逆变器中晶体管基极驱动开路故障的检测和隔离的方法。通过将三相静 止坐标系变换为两相静止坐标系,来分析两相坐标系下的电流矢量轨迹特点。经过对各个晶体管故障时 的电流矢量轨迹的斜率的研究,提出了一种基于电流矢量轨迹斜率的故障检测和隔离方法。

This paper presents a method of detection and isolation on a pulsewidth modulation inverter supplying a asynchronous machine. This method is based on the analysis of the slope of the current trajectories, which are based on the Concordia transform. This method is proved successful by MATLAB/ SIMULINK.