A prototype validates the feasibility of the designed pole-changing winding and the built model, which is suitable for operation in different poles, separately also, it illustrates effective operation in the pole-changing process, where both operating modes coexist. A uniform model for the conventional winding-based PPM induction machine, including inductance matrices, voltages, flux linkages, mechanical dynamics, and torque equation, are deduced by employing the winding distributed function. The results verify advantages of the conventional winding machine over the others in application to the PPM. A general winding design rule for the pole-phase modulation (PPM) induction machine is proposed, and three different structures, such as conventional winding machine, toroidal winding machine, and dual-rotor toroidal winding machine, are compared.
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