A Study on Shifting Shock of Multi-step Electromagnetic Transmission in Interior Permanent Magnet Synchronous Motor for EV

Abstract

Background/ Objectives: Apply the electromagnetic multi-step transmission method to expand the average efficiency area of electric vehicles. In this paper, analyze the influence of torque caused by shift shock due to electromagnetic multi-shift. Methods/ Statistical analysis: Research has been conducted to extend the average efficiency range of the motor by applying the electromagnetic multi-step transmission method. In addition, we analyze the effects of shift shocks on the torque of the motor through finite element analysis methods(FEM) analysis. Findings: In this paper, we study the characteristic analysis of the electromagnetic multi-step transmission method of interior permanent magnet synchronous motor. In addition, we analyzed the influence of the shift shock due to the electromagnetic multi-shift on the torque. It has been confirmed that the average efficiency section of the motor is widened by the electromagnetic multi-step transmission method, and it has been confirmed that the difference in the voltage in the shift section adversely affects the torque of the motor. It has been confirmed that the influence on the torque is different based on the shift point. Improvements/ Applications: Analyzes and derives attributes thought FEM analysis using voltage source analysis and current source analysis.