Reducing Traction Motor Drive Losses in Electric Vehicle using Advanced Torque Modulation

This paper presents an advanced torque modulation technique for motor control called dynamic motor drive that enables existing electric powertrains to achieve an extended driving range. Dynamic motor drive technology reduces low load losses by modulating torque, selectively operating the motor and power electronics intermittently at high loads, resulting in higher system efficiencies. Simulation results predict the reduction of energy consumption over the WLTP drive cycle of 2% for an electrically excited synchronous motor (EESM) and 0.4% for an interior permanent magnet (IPM) motor. This paper provides a comprehensive analysis of DMD technology, exploring its underlying principles, strategies for mitigating vibrations, and approaches to optimizing motor control for enhancing efficiency.