Current-source power converting apparatus with self-extinction devices
First Claim
1. A current-source power converting apparatus comprising:
- converter means including a plurality of self-extinction devices, said converter means being supplied by an AC power source for converting AC power into DC power;
inverter means including a plurality of self-extinction devices for inverting the DC power converted by said converter means into AC power and for supplying the inverted AC power to an AC load;
DC reactor means connected between said converter means and said inverter means;
capactor means connected at the output of said inverter means; and
DC power supply means including a battery for supplying DC power and means for intermittently communicating the DC power between said battery and said inverter means when the AC power source fails.
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Accused Products
Abstract
A current-source power converting apparatus having a three phase AC-DC converter composed of self-extinction devices for converting an AC power furnished from an three phase AC power source into a DC power and a DC-AC inverter connected with the AC-DC converter through a DC reactor for re-converting the DC power into a three phase AC power to supply the re-converted power for a load. When the failure of the AC power source is detect according to one embodiment, the AC power source is detached from the AC-DC converter and a battery is connected between arbitrary two phases at the input end of the AC-DC converter. After that, the DC power of the battery is supplied for the DC-AC inverter intermittently by switching the corresponding self-extinction devices of the AC-DC converter and controlled by varying the duty ratio of the switching operation.
29 Citations
4 Claims
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1. A current-source power converting apparatus comprising:
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converter means including a plurality of self-extinction devices, said converter means being supplied by an AC power source for converting AC power into DC power; inverter means including a plurality of self-extinction devices for inverting the DC power converted by said converter means into AC power and for supplying the inverted AC power to an AC load; DC reactor means connected between said converter means and said inverter means; capactor means connected at the output of said inverter means; and DC power supply means including a battery for supplying DC power and means for intermittently communicating the DC power between said battery and said inverter means when the AC power source fails. - View Dependent Claims (2, 3, 4)
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Specification