AC power supplied static switching apparatus having energy recovery capability
First Claim
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1. In a matrix converter for directly converting AC power from an AC supply to an AC load including a plurality of bilateral switches connected on respective AC phase lines, the combination of:
- a common capacitor connected between opposite pole ends of each of said bilateral switches through corresponding diode means, for deriving from said pole ends current under substantially constant DC voltage; and
means connected across said common capacitor for dissipating energy accumulated in said common capacitor.
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Abstract
A three-phase matrix converter including switches having snubber circuits associated thereto, is provided with a common voltage clamp capacitor for limiting the voltage applied to the snubber capacitor, and energy is accumulated in the clamp capacitor which is controllably dissipated, in particular by providing energy to auxiliary elements of the overall system.
39 Citations
5 Claims
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1. In a matrix converter for directly converting AC power from an AC supply to an AC load including a plurality of bilateral switches connected on respective AC phase lines, the combination of:
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a common capacitor connected between opposite pole ends of each of said bilateral switches through corresponding diode means, for deriving from said pole ends current under substantially constant DC voltage; and means connected across said common capacitor for dissipating energy accumulated in said common capacitor. - View Dependent Claims (2, 3, 4, 5)
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Specification