Modeling and state equations of an aluminum rotor single side axial field induction motor

Because of the large airgap and main factors vary with diameter, traditional analysis method results in large error in analyzing axial field motor, and the skin effect can´t be described accurately. A new disc induction motor electromagnetic model is proposed. Sub-loop calculation and multi-layer model are used to solve the key issues and improve the model accuracy. T model equivalent circuit of the model is achieved based on electromagnetic field distribution. Field inductance, rotor resistance and torque vary with slip ratio are analyzed. Test the equivalent circuit parameters by no-load test and short-circuit test, the results match well, which indicate the analyzing method is capable to estimate the single side axial field induction motor´s parameters accurately. Calculât torque output varies with slip ratio, the calculation results are close to experimental results under high slip ratio working condition.