| CPC H02M 1/0095 (2021.05) [H02M 1/327 (2021.05); H02M 3/003 (2021.05); H02M 3/07 (2013.01); H02M 3/1582 (2013.01); H02M 3/1584 (2013.01); H05K 7/20909 (2013.01)] | 18 Claims |
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1. A flying capacitor three-level converter, comprising:
a plurality of circuit units, wherein each of the plurality of circuit units comprises:
an input capacitor;
a bridge arm, electrically connected with the input capacitor in parallel, wherein the bridge arm comprises a first switch, a second switch, a third switch and a fourth switch electrically and sequentially connected in series; and
a flying capacitor unit, wherein the flying capacitor unit comprises a first capacitor and a second capacitor, and the first capacitor and the second capacitor are electrically connected in parallel and electrically connected with a series branch in parallel, and the series branch comprises the second switch and the third switch;
wherein the input capacitor, the first switch, the first capacitor and the fourth switch form a first switching loop, and the second capacitor, the second switch and the third switch form a second switching loop;
wherein the converter further comprises a first heat dissipation unit and a second heat dissipation unit;
wherein the first switches and the fourth switches in all the first switching loops are arranged on the first heat dissipation unit;
wherein the second switches and the third switches in all the second switching loops are arranged on the second heat dissipation unit.
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