抄録
Some energy storage devices, such as inductors or capacitors, are needed in single-phase AC to DC converter because instantaneous power flow of input single-phase AC is inherently pulsating and output DC power is required to have as little ripple as possible. Energy storage devices are usually used at the DC side, such as smoothing inductors or capacitors. In those converters, energy storage ability of the devices can not be used effectively, especially when DC power ripple is required to be very small.
To solve such a problem, this paper presents novel single-phase AC/DC conversion circuits, in which the energy storage devices are used at the AC side rather than at the DC side. That is, after converting single-phase AC into balanced (rectangular) two-phase AC using variable reactance element, re-conversion of it into DC is carried out.
This paper presents control method of the converters and the variable reactance devices, and performance of the proposed circuits are confirmed using computer simulation.
