Optimization Design of Doubly Salient Electro-Magnetic Motor under Fault-Tolerant Operation of Excitation Fault

Excitation fault is troublesome because it takes a negative impact on the overall performance of the doubly salient electromagnetic machine (DSEM).The output torque of DSEM is only the reluctance torque when it operates in the state of loss of excitation. In order to make the motor operate normally in the state of loss of excitation, the motor parameters should be designed to meet the operation characteristics of DSEM and SRM in the state of loss of excitation as much as possible.In this paper, the main structure factors that affect the normal operation of DSEM in the state of loss of excitation were analyzed. A 12 / 8-pole finite element analysis model of DSEM is established.The different stator pole, stator yoke, rotor pole, rotor yoke and air gap of the motor were simulated. The influence of the structural parameter changes on the electrical and magnetic characteristics of the motor was studied.The number of turns of DSEM winding suitable for loss of excitation fault-tolerant operation was designed and simulated.