| Title |
Switch Open Fault Detection Technique of Dual Three-Phase Inverter Using Variable Cut-off Frequency HPF |
| Authors |
Han-Eol Kim ; Ki-Chang Lee ; Kyung-yub Kim ; Jong-won Park ; Seon-Hwan Hwang |
| DOI |
http://doi.org/10.5207/JIEIE.2022.36.11.009 |
| Keywords |
Asymmetric six-phase PMSM, Current ripple, Dual three-phase inverter, HPF with variable cut-off frequency, Open fault detection |
| Abstract |
This paper proposes a technique for detecting individual open fault on the top and bottom of a dual three-phase inverter. In general, the switching devices have a high failure rate in the dual three-phase inverter. Especially, the switching devices may fail due to high switching frequency and thermal, electrical, and mechanical stress. As a result, the proposed method normalizes the measured phase currents and detects failures through integrators and HPF with variable cut-off frequency. Therefore, the proposed algorithm can stably detect fault even in the steady state and transient state where the rotor speed is changed. The effectiveness and usefulness of the proposed method are verified through several experiments. |