Demand of small uninterruptible power supply(UPS) less than 1KVA suitable for micro-computers and electronic equipments concerning office and home automation is rapidly increased. For these applications of UPS, small size and low cost are mostly required.
In this paper, a new bilateral series resonant inverter and its control method are proposed. The proposed inverter consists of zero current switched series resonant converter, high frequency isolation transformer and zero current switched cycloconverter.
Output voltage is regulated by modulating the average magnitude of resonant current sinusoidally. Cycloconverter synthesizes low frequency output voltage from the high frequency resonant current pulses. In the proposed inverter, bidirectional power flow is possible and isolation transformer is miniaturized. The proposed control method is verified through simulation and experiment.
