Calculation of torque-speed characteristic of induction machine for electrical vehicle application using analytical method

This paper presents an analytical method of calculating maximum torque/power-speed characteristic of IM for electrical vehicle application, based on a dq-axis reference frame. The method of obtaining torque/power-speed characteristic of IM is introduced firstly. Then the detailed calculation methods of IM parameters, which include stator and rotor resistances, mutual and leakage inductances, are presented. Finally, the analytically calculated torque/power-speed characteristics of a 12kW IM are verified by finite element analyses and experiments.