Buck matrix-type rectifier with boost switch, and operation thereof during one-phase loss
AssigneeMurata Manufacturing Co., Ltd.
InventorsJahangir Afsharian, Dewei Xu, Bing Gong
Life of this patent
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Abstract
A power supply circuit includes at least two input terminals that receive an input voltage, a transformer including a primary side electrically connected to the input voltage, a rectifier electrically connected to a secondary side of the transformer, and a boost switch electrically connected in parallel with the rectifier and a pair of output voltage terminals that include a first output voltage terminal and a second output voltage terminal. The input voltage is electrically connected to an AC source, and each of the at least two input terminals receives a different phase of the AC source.
Claims8
A power supply circuit comprising:
- a matrix converter connected to first, second, and third AC phases;
- a transformer including a primary side electrically connected to the matrix converter;
- a rectifier electrically connected to a secondary side of the transformer;
- and
- a boost switch electrically connected in parallel with the rectifier and with a pair of output voltage terminals that include a first output voltage terminal and a second output voltage terminal;
- wherein
- a duty cycle of the boost switch is zero unless the third AC phase is lost, disconnected, or shorted and unless an absolute voltage difference between the first and the second AC phases is less than an output voltage of the pair of output voltage terminals.
Dependencies are inferred from the claim text.