Manufacturing and Control of a Variable Magnetic Flux Motor Prototype with a Mechanical Adjustment Method

Abstract

A new structure and control method for a variable magnetic flux motor (VMFM) is proposed to achieve a high-efficiency electric vehicle (EV) motor drive under a wide range of conditions. A VFMF prototype that was designed by considering the loss was manufactured and evaluated in an experiment. The prototype demonstrated low iron loss and sufficient max torque. Thus, the prototype can provide a high efficiency drive with low output, which is frequently the case for EVs. Map control enables a wide phase angle for the vector-control drive of the VMFM under a changing magnetic flux. Thus, the VMFM provides a high-efficiency drive under a wide range of conditions.