| CPC H02M 7/5395 (2013.01) [H02M 1/0095 (2021.05)] | 20 Claims |
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1. A voltage conversion device, comprising:
a filter circuit electrically connected to a first alternating current (AC) terminal and a second AC terminal;
a first inductor having a terminal electrically connected to the first AC terminal and another terminal electrically connected to a first conversion terminal;
a second inductor having a terminal electrically connected to the second AC terminal and another terminal electrically connected to a second conversion terminal;
a first conversion module, comprising:
a first direct current (DC) stage circuit, comprising:
a first upper DC circuit, comprising:
a first-first DC switch unit, electrically connected to a first DC voltage terminal; and
a second-first DC switch unit, electrically connected to the first-first DC switch unit;
a first lower DC circuit, comprising:
a third-first DC switch unit, electrically connected to a second DC voltage terminal; and
a fourth-first DC switch unit, electrically connected to the third-first DC switch unit;
a first upper middle circuit, comprising:
a first-first middle switch unit, electrically connected to the second-first DC switch unit; and
a second-first middle switch unit, electrically connected to the first-first middle switch unit and a third DC voltage terminal; and
a first lower middle circuit, comprising:
a third-first middle switch unit, electrically connected to the fourth-first DC switch unit; and
a fourth-first middle switch unit, electrically connected to the third-first middle switch unit and the third DC voltage terminal;
a first conversion stage circuit, comprising:
a first-first conversion switch unit electrically connected to the first conversion terminal; and
a second-first conversion switch unit electrically connected to the first conversion terminal; and
a first inner stage circuit, comprising:
a first-first inner switch unit electrically connected to the second-first DC switch unit, the first-first middle switch unit, and the first-first conversion switch unit; and
a second-first inner switch unit, electrically connected to the fourth-first DC switch unit, the third-first middle switch unit, and the second-first conversion switch unit;
a second conversion module, comprising:
a second DC stage circuit, comprising:
a second upper DC circuit, comprising:
a first-second DC switch unit, electrically connected to the first DC voltage terminal; and
a second-second DC switch unit, electrically connected to the first-second DC switch unit;
a second lower DC circuit, comprising:
a third-second DC switch unit, electrically connected to the second DC voltage terminal; and
a fourth-second DC switch unit, electrically connected to the third-second DC switch unit;
a second upper middle circuit, comprising:
a first-second middle switch, electrically connected to the second-second DC switch unit; and
a second-second middle switch unit, electrically connected to the first-second middle switch unit and the third DC voltage terminal;
a second lower middle circuit, comprising:
a third-second middle switch unit, electrically connected to the fourth-second DC switch unit; and
a fourth-second middle switch unit, electrically connected to the third-second middle switch unit and the third DC voltage terminal;
a second conversion stage circuit, comprising:
a first-second conversion switch unit, electrically connected to the second conversion terminal; and
a second-second conversion switch unit, electrically connected to the second conversion terminal; and
a second inner stage circuit, comprising:
a first-second inner switch unit, electrically connected to the second-second DC switch unit, the first-second middle switch unit, and the first-second conversion switch unit; and
a second-second inner switch unit, electrically connected to the fourth-second DC switch unit, the third-second middle switch unit, and the second-second conversion switch unit; and
a control circuit electrically connected to the first conversion module and the second conversion module, configured for transmitting a plurality of first switch-control signals to the first conversion module and transmitting a plurality of second switch-control signals to the second conversion module, wherein
a first current path in the first DC stage circuit, the first conversion stage circuit, and the first inner stage circuit is selected in response to the first switch-control signals, and a second current path in the second DC stage circuit, the second conversion stage circuit and the second inner stage circuit is selected in response to the second switch-control signals, wherein a voltage difference between the first DC voltage terminal and the second DC voltage terminal is equivalent to two times of a voltage difference between the third DC voltage terminal and the second DC voltage terminal.
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