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This paper presents a reduced switch count multipulse rectifier with medium-frequency (MF) transformer isolation. The proposed topology consists of a three-phase push–pull based ac to dc rectifier with a MF ac link employing two active switches. A three-phase, five-limb, multiwinding MF transformer is employed for isolation. The secondary side of the transformer is connected in a zig-zag configuration...
This paper presents a reduced active switch count push-pull based DC fast charger for electric vehicles. The proposed system takes a 3-phase utility line voltage and produces a high frequency (HF) AC link employing only two active switches. A 5-limb HF transformer, in zig-zag connection, is employed for isolation. The primary side of the transformer is connected to a clamp circuit and two active semiconductor...
This paper presents a new adjustable speed drive (ASD) topology that employs medium frequency (MF) transformer isolation. The proposed system consists of a new 3-phase push-pull based AC to DC rectifier with a MF AC link employing only two active switches. A single 5-limb multi-winding MF transformer is employed for isolation. The secondary side of the transformer is connected in a zig-zag configuration...
A series resonant matrix converter (MC) based topology for high power electric vehicle (EV) battery charging is presented. The system performs DC fast charging and is capable of bidirectional power flow, for V2G (vehicle-to-grid) applications. The proposed topology can be divided into three sections: (i) a front-end 3×1 matrix converter, (ii) LrCr series resonant tank and high frequency (HF) transformer,...
This paper presents a new grid-connected delta inverter system (DIS) for large scale photovoltaic (PV) power systems. The delta inverter achieves DC to three phase AC inversion by using only three power semiconductor devices instead of six devices as in a conventional full bridge three phase inverter. This reduction in the number of switching devices contributes to higher power density for PV energy...
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