Title :
Phase-controlled DC-AC converter with high-frequency switching
Author :
Harada, Koosuke ; Sakamoto, Hiroshi ; Shoyama, Masahito
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
Abstract :
An analysis of the phase-controlled DC-AC converter is presented. This converter has a pair of switches in each side of the primary and the secondary of the isolation transformer. The voltage conversion ratio is controlled by the phase difference between the two pairs of switches. The averaged equivalent circuit for low frequency operation is derived. The switching surge during commutation is much reduced by dividing the reactor into two parts. As a result, the transformer is miniaturized by increasing the switching frequency and the reactive energy can be easily recovered to the DC source. This DC-AC converter is especially suitable for small uninterruptible power supply systems.<>
Keywords :
phase control; power convertors; power supplies to apparatus; DC-AC converter; UPS; commutation; equivalent circuit; high-frequency switching; isolation transformer; phase control; reactive energy; switches; switching surge; uninterruptible power supply; voltage conversion; DC-DC power converters; Equivalent circuits; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Surges; Switches; Switching converters; Switching frequency; Uninterruptible power systems;
Journal_Title :
Power Electronics, IEEE Transactions on
