Analysis of Transformerless Bidirectional AC/DC Converter Based on Double Half-Bridge Topology with Non-Commutating Neutral Wire

54th International Scientific Conference of Riga Technical University: Digest Book and Electronic Proceedings 2013
Aleksandrs Suzdaļenko, Iļja Galkins

The present article studies the converter, which is based on dual half-bridge topology with common neutral wire that is not commutating during converter’s operation. The current sensorless control algorithm has been obtained analytically for rectification, grid-tied and stand-alone inverter modes, which average value tracks reference current signal with constant switching frequency. Two control functions for inductor’s discontinuous and continuous current modes have been defined for each of operation modes, and sensorless transition between two modes has been stated. The results of simulation in the PSIM software approved the analytical model, keeping the average inductor’s current to follow the reference value in inductor’s discontinuous and continuous conduction modes.

Keywords
ac-dc power converters; current control; inverters; pulse width modulation converters; sensorless control

Suzdaļenko, A., Galkins, I. Analysis of Transformerless Bidirectional AC/DC Converter Based on Double Half-Bridge Topology with Non-Commutating Neutral Wire. In: 54th International Scientific Conference of Riga Technical University: Digest Book and Electronic Proceedings, Latvia, Rīga, 14-16 October, 2013. Rīga: RTU Press, 2013, pp.1-6. ISBN 9789934104701.

Publication language
English (en)