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Analysis of Electromagnetic Parameters and Out Performance of Asynchronous Motor under Overload Condition

With the development of all-electric technology, motors are gradually being used in various extreme environments. The conventionally design of motors can no longer meet the needs of use. Motors with extreme output performance have become the target of people's pursuit. How to improve the torque overload capacity of the motor is an important problem faced by the motor development. This paper explores the overload torque characteristics of asynchronous motors, and fully investigates the electromagnetic parameters and output performance of the motor under overload condition. Starting from the electromagnetic torque of the asynchronous motor, the influence of electric load and magnetic load on the overload capacity of the motor is analyzed. Next, the degree of variation of stator current, rotor electric density and core magnetic density under overload operation is analyzed to clarify the change law among the electromagnetic parameters. Finally, the changes in efficiency and power factor of the motor at different speed and torque conditions are studied, and the operating law of the motor under overload conditions is analyzed.