| Title |
A Study on Fault Model and Performance Evaluation under Power Switch Open Fault in an Inverter-Driven Permanent Magnet Synchronous Motor |
| Authors |
Kyeong-Hwa Kim ; Dong-Uk Choi ; Bon-Gwan Gu ; In-Soung Jung |
| Keywords |
Inverter Open ; Fault Model ; Diagnostic Evaluation ; Simulation ; DSP TMS320F28335 |
| Abstract |
To analyze influences under open faults in switching devices of the PWM inverter and under the isolation between the inverter and motor terminal, a faulty model for the inverter-driven permanent magnet synchronous motor is presented. Even though the conventional dq motor model obtained through the transformation of phase voltage model is widely used to analyze and control AC motor, it can not be used under open faults in switching devices since the 3-phase balanced condition is no longer hold under the open fault and it is not easy to obtain motor input voltages in open phase from the pole voltage. To deal with this problem, a faulty model for an inverter-driven permanent magnet synchronous motor is derived by using the line voltage of motor according to switch open, which can be effectively used for performance evaluation of the diagnostic algorithm. The validity of the proposed faulty model is verified through comparative simulations and experiments using DSP TMS320F28335. |