| Abstract |
This paper presents measurements on a 5 kW three phase resonant converter. The operation of the resonant converter is described highlighting a new method of maintaining the resonance of the resonant circuit. It is named non-short circuit method. Using the non-short circuit method a robust three phase resonant converter operation is possible, and it improves the voltage limiting ability of a recently proposed link voltage peak control scheme. It is described how the control ofthe link voltage peak is possible by appropriate timing of the converter switching. The strategy is named voltage peak control (VPC). The advantage of VPC is that no additional clamp circuit is required, but there are introduced a number of non-zero inverter switching instants at low voltage. A separate measurement of losses in rectifier, resonant link, inverter and load is carried out. The VPC control influence on the converter losses is presented, the converter test setup was able to load the converter with 3.8 kW, an efficiency of 97.2 % was measured. |
