Buchanan Ingersoll & Rooney PC
Power conversion device for reliable control of circulating current
A power conversion device includes a plurality of leg circuits and a control device. The plurality of leg circuits correspond to respective phases of an AC circuit and connected in parallel between common first and second DC terminals. Each leg circuit includes a plurality of chopper cells each including an energy storage and cascaded to one another and at least one inductance connected in series to the plurality of chopper cells. The control device controls an operation of only at least one chopper cell included in each leg circuit based on a circulating current which circulates through the leg circuits.
MITSUBISHI ELECTRIC CORPORATION
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Takushi Ryosuke Toshiyuki
Jimichi Uda Fujii