Browse Publications Technical Papers 2008-01-0407
2008-04-14

Currents Mean and Min / Max Values for Diagnostic of One and Two Simultaneous Open-Switches Faults in Three Phase Voltage Inverter Fed Permanent Magnet Brushless DC Motor Drives 2008-01-0407

The faulty performance of permanent-magnet (PM) brushless dc motor drives is studied under one and two simultaneous open-switches faults conditions. This DC motor is supplied with three phase two level six IGBT (Insulated-Gate Bipolar Transistor) voltage source inverter. The three phases currents mean, min and max values of the DC motor are used as diagnostic indices. A knowledge algorithm is based to get information on which IGBT is in open-switch fault condition. This algorithm testing shows that the system could not only detect the open-switch fault, but also identify the faulty switch. Presented simulation results confirm the effectiveness of the proposed methodology.

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