Linear AC power supplies can be replaced by their nonlinear switching counterparts due to the lower voltage drops and higher efficiency and power density of switching-mode inverters. Multilevel cascaded H-bridge (CHB) converters are the preferred inverter structure because of modular configuration, control, and protection. The output voltage quality in CHB converters depends on the number of ou...

A soft-switched inverter is derived from the passively clamped quasi-resonant link circuit with three different clamps: coupled inductor, diode clamp and coupled inductor and capacitor. The proposed soft-switching inverter is formed from the traditional pulse-width modulated (PWM) inverter by simply augmenting with auxiliary resonant circuits, and the soft switching is achieved through applying...

The role of multilevel inverters in improving power quality has been already proved long back ago. The major concern in using multi level inverters is the number of switches used in it. As the level of inverter increases. So there is a need to reduce the component count in multilevel inverter. In this paper we use a statcom which is consists of a multilevel inverter with reduced switch count. T...

(ABSTRACT) A single-phase grid connected transformerless photovoltaic (PV) inverter for residential application is presented. The inverter is derived from a boost cascaded with buck converter along with a line frequency unfolding circuit. Due to its novel operating modes, high efficiency can be achieved because there is only one switch operating at high frequency at a time, and the converter al...

This paper introduces a new method to track the saliency of a PMSM motor fed by a four-leg inverter in case of a single phase open circuit fault through measuring the dynamic current response of the motor line currents due the IGBT switching actions. In the case of a single phase open circuit fault, a fault-tolerant control strategy that includes taking appropriate actions to control the two re...

Due to the potential benefits resulting from the use of more than the conventional three phases in transmission, some interest has also grown in the area of multi-phase (phase order more than three) machines in recent years. Multi-phase loads particularly in the form of inverter fed induction motor drives suited to high power and specialized applications, are receiving growing attention in the ...