A soft-switching active rectifier using a concept of magnetic energy recovery switch

Converters using active switches can improve harmonic components of input current and power factor. Moreover, these converters contribute to the footprint downsizing. However, increase of switching losses and EMI due to high frequency switching is one challenge of these types of converters. This paper proposes a new active rectifier circuit topology, which can reduce the switching losses and EMI with soft-switching. Design principles were described. Experimental results confirmed that the proposed circuit has high efficiency with high power factor and low current harmonics. Additionally, the results show that there is a trade-off between loss and harmonics performance.