| Abstract |
In this paper a three-phase current-controlled AC to DC converter is adopted by using only four active .switches to simplify the hardware circuit and achieve unity power factor, sinusoïdal input current and bidirectional . power flow capability. A small-signal model is derived and, in addition to the feedback control, a three-phase instantaneous voltage detector is also proposed for. the added adaptive feed-forward control to achieve almost
zero output impedance and zero audio susceptibility. Finally, a prototype hardware circuit is constructed and some experimental results are presented for demonstration. |
