Implementation of softswitehed frequency unfolder technique for single phase inverter

ÜRGÜN S., ERFİDAN T., ÇAKIR B.

MELECON 2008 - 2008 IEEE Mediterranean Electrotechnical Conference, Ajaccio, France, 5 - 07 May 2008, pp.625-628, (Full Text) identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/melcon.2008.4618504
  • City: Ajaccio
  • Country: France
  • Page Numbers: pp.625-628
  • Keywords: And microcontroller, Driver, Frequency unfolder, PWM, Single-phase inverter, Soft switching
  • Kocaeli University Affiliated: Yes

Abstract

In this paper, a novel DC link softswitehed inverter is presented. The new inverter uses softswitehed frequency unfolder technique to provide soft-switching feature while keeping pulse width modulation (PWM) capability without high voltage stress The main obstacle for inverters to operate at high frequencies is the increasing switching losses with the increasing switching frequencies. At high switching frequencies, the EMI noises in the circuitry inrease and power density decreases. To overcome these problems, switching losses must be reduced. In this paper, with the help of proposed softswitching cell, the power loss at the switching instants are terminated and the operation of inverter at high frequencies ensured. As a result, with the use of the unfolder teacnique and softswitching cell, inverter efficiency increased. © 2008 IEEE.