Performance assessment of triple redundant nine-phase delta- and wye-connected permanent magnet-assisted synchronous reluctance motor under healthy and fault conditions

Abstract

In this study, the performance of a triple redundant nine-phase permanent magnet-assisted synchronous reluctance motor with delta-connected windings is comprehensively assessed and compared with that of wye-connected winding under healthy and fault conditions, including open circuit, inter-turn short-circuit and terminal short circuit. The steady-state torque behaviour, loss, efficiency and temperature distribution of the two winding configurations are analysed and compared. It is shown that the delta-connected winding has higher output torque under one phase open-circuit fault and lower inter-turn short-circuit current with three-phase terminal short circuit.

Keywords

• reluctance motors
• short-circuit currents
• permanent magnet motors
• torque
• machine windings
• fault diagnosis
• temperature distribution
• performance assessment
• triple redundant nine-phase delta
• wye-connected permanent magnet-assisted synchronous reluctance motor
• delta-connected winding
• steady-state torque behaviour
• temperature distribution
• winding configurations
• phase open-circuit fault
• three-phase terminal short circuit
• healthy condition
• lower interturn short-circuit
• triple redundant nine-phase permanent magnet-assisted SRM
• fault condition