| Title |
A Diagnosis Scheme of Switching Devices under Open Fault in Inverter-Fed Interior Permanent Magnet Synchronous Motor Drive |
| Authors |
Dong-Uk Choi ; Kyeong-Hwa Kim |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2012.26.3.061 |
| Keywords |
DC Shunt Motor ; Speed ; Flux |
| Abstract |
This paper deals with a fault diagnosis algorithm for open faults in the switching devices of PWM inverter-fed IPMSM (Interior Permanent Magnet Synchronous Motor) drive. The proposed diagnostic algorithm is realized in the controller using the informations of three-phase currents or reference line-to-line voltages, without requiring additional equipments for fault detection. Under switch open fault conditions, the conventional dq model used to control an AC motor cannot directly be applied for the analysis of drive system, since three-phase balanced condition does not hold. To overcome this limitation, a fault model based on the line-to-line voltages is employed for the simulation studies. For comparative performance evaluation through the experiments, the entire control system is implemented using digital signal processor (DSP) TMS320F28335. Simulations and experimental results are presented to verify the validity of the proposed diagnosis algorithm. |