Efficient Energy Management System for Open-Winding Motor Drive for Electrical Vehicle With Hybrid Energy Storage Systems

In 3-Phase motor drive to incorporate hybrid energy storage system, a bi-directional DC-DC converter is needed, which adds complexity and cost to the system. In open winding motor drive, hybrid energy storage system can be integrated without using any DC-DC converters. Another important advantage of using open winding motor drive is reduction of voltage rating of the sources. The open- winding induction motor is fed by two voltage source inverters with isolated dc storage systems. By controlling the inverter output voltages, it is possible to control the motor output power and power flow between two storage devices simultaneously. An energy management system has been developed with three modes of operations, accelerating mode, cruising mode and braking mode depending upon driving condition. The developed energy management system has been tested for a real sized car (Tata Nano) with two different urban drive cycle in MATLAB Simulink environment.