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US 10,256,721 B2Granted
Step-down chopper circuit including a switching device circuit and a backflow prevention diode circuit
AssigneeFuji Electric Co., Ltd.
InventorsOsamu Hikone, Motoyoshi Kubouchi
Life of this patent
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Abstract
In a step-down chopper circuit, a distance between a plurality of first mounting portions of a first semiconductor package that houses a switching device circuit and a distance between a plurality of second mounting portions of a second semiconductor package that houses a backflow prevention diode circuit are different from each other.
Claims12
A step-down chopper circuit comprising:
- a step-down chopper circuit body including
- a reactor;
- and
- a capacitor circuit connected to the reactor;
- a first semiconductor package that includes a plurality of first through-holes to detachably fasten the first semiconductor package on the step-down chopper circuit body with first screws, and a switching device circuit connected in series to a direct-current output circuit;
- and
- a second semiconductor package that is provided separately from the first semiconductor package, and includes a plurality of second through-holes to detachably fasten the second semiconductor package on the step-down chopper circuit body with second screws, and a backflow prevention diode circuit connected to two ends of the capacitor circuit through the reactor and arranged so that the switching device circuit is connected to the direct-current output circuit between two ends of the backflow prevention diode circuit,
- wherein a distance between the plurality of first through-holes arranged adjacent to each other in a predetermined direction and a distance between the plurality of second through-holes arranged adjacent to each other in the predetermined direction are different from each other.
5 more elements
Dependencies are inferred from the claim text.