Ho-Hyun Kang, Sung-Jin Jang, Hyung-Woo Lee, Jun-Ho Hwang, and Kyo-Beum Lee, "An Advanced Dead-Time Compensation Method for Dual Inverter with a Floating Capacitor," Journal of Institute of Korean Electrical and Electronics Engineers, vol. 26, no. 2, pp. 2 > Paper

This paper proposes an advanced dead-time compensation method for dual inverter with a floating capacitor. The dual inverter with floating capacitor is composed of double two-level inverters and a bulk electrolytic capacitor. The output voltage of the dual inverter is dropped by the conduction voltage of the power semiconductors. The voltage drop and dead-time cause the fundamental and harmonic distortions of output currents. When supplied power for OEW-load is low, the dual inverter operates as single inverter for effective operation. The dead-time compensation method for the dual inverter operated as single inverter is needed for reliability. The proposed method using band pass filter in this paper compensates dead-time, dead-time error and changed voltage drop error of power semiconductors for the dual inverter and dual inverter operated as single inverter. The effectiveness of the proposed method is verified by simulation results.