Control Method that Reduces the High Harmonic in Overmodulation Drive of Dual Winding Motor under Condition of Voltage Supplies Unbalance

Looking toward the autonomous driving, redundant motor drive system with two voltage supplies, two inverters, and a dual winding motor is reported recently. The dual winding motor has a characteristic of cancelling the 6
^th
harmonic produced in overmodulation drive. However, it loses its characteristic when there is voltage difference in the two voltage supplies. In this report, it is shown that characteristics of cancellation is maintained even if there is voltage difference in the two voltage supplies when sum of the current is controlled. The maintained characteristics is confirmed with the simulation.