High Efficiency Dual-Mode Current Modulation Method for Low-Power DC/AC Inverters

Author

Amirahmadi, Ahmadreza ; Lin Chen ; Somani, Utsav ; Haibing Hu ; Kutkut, N. ; Bartarseh, Issa

Author_Institution

Florida Power Electron. Center (FPEC), Univ. of Central Florida, Orlando, FL, USA

Volume

29

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

2638

Lastpage

2642

Abstract

Boundary conduction mode (BCM) zero voltage switching (ZVS) current control is a promising soft switching method for microinverter applications. In this letter, different BCM ZVS current control modulation schemes are compared based on power losses breakdown, switching frequency range, and current quality. Compared to continuous conduction mode current control, BCM ZVS control decreases MOSFET switching losses and filter inductor conduction losses but increases MOSFET conduction losses and inductor core losses. Based on the loss analysis, a dual-mode current modulation method combining ZVS and zero current switching schemes is proposed to improve the efficiency of the microinverter. The experimental results show that by using this proposed current modulation scheme, higher efficiency of 0.5% can be achieved with no additional cost for a 400-W three-phase microinverter.

Keywords

DC-AC power convertors; MOSFET; electric current control; inductors; invertors; zero voltage switching; BCM ZVS current control modulation; MOSFET conduction losses; MOSFET switching losses; boundary conduction mode; continuous conduction mode current control; current modulation scheme; dual-mode current modulation method; filter inductor conduction losses; high efficiency dual-mode current modulation method; inductor core losses; loss analysis; low-power dc-ac inverters; microinverter; power 400 W; power losses breakdown; soft switching method; switching frequency range; three-phase microinverter; zero voltage switching; Current control; Inductors; Inverters; Modulation; Switching frequency; Zero current switching; Zero voltage switching; BCM; ZVS; current modulation; three-phase microinverter;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2013.2285624

Filename

6632940