Voltage observer-based closed-loop balancing control of the four level flying capacitor frequency converter for mv elctric drive appliations

Electrical engineering

The paper submitted is devoted to the development of automatic voltage–balancing control system of a 4-level inverter which is based upon PWM correction of the capacitor charging/discharging process parameters according to feed back control signals obtained with assistance of a flying capacitors voltage observer. Verification of the algorithms elaborated is implemented via simulation of frequency converter transient responses.