An Experimental Study on a PWM Method without Dead-Time Error for Three-Phase Voltage-Fed Inverter

Abstract

Voltage-fed inverters have dead-time to protect against short-circuit of the DC-link voltage. Dead-time distorts AC-output voltage and decreases DC-link voltage utilization. To overcome these problems, the authors propose a novel PWM method without voltage error caused by the dead-time of the converter. In this paper, the principle and theoretical operation of the proposed PWM method are described in detail and the theory is confirmed through experiment results.