Power conversion device
AssigneeMitsubishi Electric Corporation
InventorYu Kawai
Life of this patent
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Abstract
At least one of the N DC voltage terminals is connected to a DC power supply. The converter includes: a multi-winding transformer having N (N≥3) windings; and N full-bridge circuits each having a first leg, a second leg, and a reactor and each being connected to a corresponding power supply and a corresponding winding. The switching control unit switches switching elements in the first leg and the second leg included in each of M (N−1≥M≥1) full-bridge circuits among the N full-bridge circuits, switches switching elements in the second leg included in each of remaining (N−M) full-bridge circuits, and stops switching of switching elements in the first leg in each of the remaining (N−M) full-bridge circuits.
Claims7
A power conversion device comprising:
- N DC voltage terminals;
- a converter;
- and
- a switching control circuit to control switching of switching elements included in the converter, wherein
- at least one of the N DC voltage terminals is connected to a DC power supply,
- the converter includes
- a multi-winding transformer having N (N≥3) windings, and
- N full-bridge circuits each having a first leg, a second leg, and a reactor, each of the N full-bridge circuits being connected to a corresponding one of the DC voltage terminals and a corresponding one of the windings, and
- the switching control circuit
- switches switching elements in the first leg and the second leg, the first leg and the second leg being included in each of M (N−1≥M≥1) full-bridge circuits among the N full-bridge circuits,
- switches switching elements in the second leg included in each of (N−M) full-bridge circuits that remain, and
- stops switching of switching elements in the first leg included in each of the (N−M) full-bridge circuits;
- wherein the switching control circuit includes a current control circuit to generate a command related to switching in such a manner that a current target value is adjusted for each of the full-bridge circuits in power transmission for charging/discharging through the multi-winding transformer,
- based on the command related to switching, the switching control circuit detects an operation mode representing a characteristic of transmission and reception of electric power through the multi-winding transformer,
- the switching control circuit includes a gain compensation circuit to correct the command related to switching based on the detected operation mode.
Dependencies are inferred from the claim text.