Multi-objective Optimization Design of Variable-Saliency-Ratio PM Motor Considering Driving Cycles

In this article, a variable-saliency-ratio permanent magnet motor is designed and optimized considering driving cycles. To satisfy the demands of multi-operation conditions of EVs, a variable resistance is adopted and a new variable-saliency-ratio design concept is proposed to enhance output torque, widen speed range and lower irreversible demagnetization risk effectively. A multiobjective optimization considering driving cycles is proposed, where the design objective of saliency ratio is firstly selected and optimized with multiobjective genetic algorithm method. Then, the operation performances of the motor in different operation conditions are investigated in detail. Finally, a prototype motor is built and tested. Both the simulation and experimental results verify the validity of the proposed method.

Automated summary

In this article, a variable-saliency-ratio permanent magnet motor is designed and optimized with a new design concept to enhance output torque, widen speed range, and lower irreversible demagnetization risk. A multiobjective optimization considering driving cycles is proposed to optimize the design objective of saliency ratio using a multiobjective genetic algorithm method. Both simulation and experimental results confirm the effectiveness of the proposed method.