Open-Switch Fault Detection Based on Open-Winding Five-Phase Fault-Tolerant Permanent-Magnet Motor Drives

The difficulty of open-switch fault detection in an open-winding inverter is that the at diagonally opposite position within H-bridge power cell has same characteristics. To solve this problem, paper proposes method based on (OW) five-phase fault-tolerant permanent-magnet (FPFTPM) motor drives. includes three steps: first, drives detected by monitoring component third harmonic residual stationary reference frame; second, least squares iterative forgetting factor used to identify relationship between components, which determines faulty phase and current type; third, online injection test proposed accurately cell. Based above steps, could be identified. novelty lies possibility any switches one achieved does not require hardware changes. experimental results demonstrate effectiveness method.