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This paper deals with bidirectional AC-DC converter with high power efficiency and high power factor, in which the novel FPGA control strategy is applied. The prototype bidirectional AC-DC converter of the rated power of 2kW is made and tested. As a result, in both forward operation mode and regenerative one, the power efficiency is at 97.0% at the rated output power of 2kW, is over 98.0% at 25% output power of the rated one and maximum one is 98.4% at 0.7kW. The power factor is over 0.99 under the output power condition from 20% to the rated one and over 0.96 under 10% output power condition of the rated one. The transient response time is under half period, when the converter operation is changed from the forward mode to regenerative one.
Date of Conference: Sept. 30 2012-Oct. 4 2012