D16.4 - Load Test Method Using Two Small-Capacity Power Supplies for High-Frequency Transformers in Single-Phase Dual Active Bridge Converters

This paper describes a load test method using two small-capacity power supplies for high-frequency transformers in single-phase dual active bridge (DAB) converters operated at 40 kHz. Experimental results show the accuracy of power loss measurement is improved compared to an existing method which obtains the power loss by subtracting an output power from an input power of the transformer. In addition, it is experimentally verified that the proposed load test was performed at the output power of 1 kW while the total apparent power for two power supplies is only 60 VA.