AC current source circuit for converting DC voltage into AC current
First Claim
1. An AC current source circuit for converting a DC input voltage into an AC output current, comprising:
- a chopper circuit having a pair of input terminals for converting the DC input voltage applied to said input terminals into a chopper voltage;
an inverter including at least four switch elements, for converting the chopper voltage into an output AC current having a predetermined frequency; and
a plurality of clamp-type snubber circuits, each of said snubber circuits corresponding to said switch elements,wherein said snubber circuits discharge to said input terminals of said chopper circuit.
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Accused Products
Abstract
An AC current source circuit converts a DC input voltage into an AC output current, and comprises a chopper circuit for converting a DC input voltage into a chopper voltage; and an inverter for converting the chopper voltage into an output AC current of a predetermined frequency. The inverter comprises at least four switch elements, and clamp-type snubber circuits corresponding to each of the switch elements are provided. The snubber circuit releases electric charges to the input terminal of the DC input voltage of the chopper circuit. The chopper circuit is connected to the inverter through a DC reactor. The DC input voltage is converted into a DC current by the chopper circuit and the DC reactor and transmitted to the inverter.
19 Citations
14 Claims
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1. An AC current source circuit for converting a DC input voltage into an AC output current, comprising:
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a chopper circuit having a pair of input terminals for converting the DC input voltage applied to said input terminals into a chopper voltage; an inverter including at least four switch elements, for converting the chopper voltage into an output AC current having a predetermined frequency; and a plurality of clamp-type snubber circuits, each of said snubber circuits corresponding to said switch elements, wherein said snubber circuits discharge to said input terminals of said chopper circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An AC current source for converting a DC input voltage into an AC output current, comprising:
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chopper means for converting the DC input voltage into a chopper voltage; reactor means for generating a DC current based on the chopper voltage; inverter means comprising switching means for converting the DC current from said reactor means into the AC output current; and snubber means of a clamp-type corresponding to said switching means, wherein said snubber means discharges to said chopper means.
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Specification