Analysis of Design Impact for Improving Harmonic Characteristics of Winding Field Synchronous Motor

According to environmental policy, the vehicle is changed from an internal combustion engine car to an electric vehicle using an electric drive motor. A permanent magnet type is the main driving motor. Environmental pollution factors caused by the production of permanent magnets, i.e., rare earths, are causing problems that adversely affect the environment more than environmental pollution factors caused by internal combustion engine cars. Therefore, it is necessary to develop a WFSM (Wound Field Synchronous Motor) by requiring a dilute earth motor instead of a permanent magnet motor. The developed motor requires shape application to improve torque ripple, noise, and vibration because it is difficult to apply design elements such as rotor Skew. In this paper, the characteristics of applying balancing holes to rotor surfaces are compared to improve noise, vibration improvement, and motor operation safety due to ripple increase by field winding design for improving field inverter control.