Capacitor current reducing control of the inverters for the dual winding motor

The motors and inverters used in the vehicle is increasing. There are high requirement of safety and installation space to the motors and the inverters. The dual winding motor and its parallel control by the two inverters is one of the size reducing technologies which also contribute to the safety with its redundancy. In this paper, inverter size reducing control of the two inverters for the dual winding motor is proposed. The control reduces the size of inverter by reducing the load to the capacitor. By shifting neutral voltage of the two inverters to the different direction, the timing of charging and discharging of two inverters are changed. By exchanging shifting direction at certain interval, loss of the upper and lower switching device is balanced also.