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United States Patent | 3,569,819 |
Martzloff , et al. | March 9, 1971 |
When a short circuit or shoot-through occurs in a power circuit having two thyristors in series with commutating circuit inductors, a shunt capacitor isolated from the DC power supply by an impedance automatically resonates with the inductors to turn off both thyristors. A second automatic recovery system for repeated short circuits that occur before the capacitor has recharged operates to temporarily disable the power supply. In a high-voltage inverter the impedance is a resistor functioning to dampen voltage overshoots and to implement a relay or solid state second recovery system.
Inventors: | Martzloff; Francois D. (Schenectady, NY), McMurray; William (Schenectady, NY), Walden; John P. (Schenectady, NY) |
Assignee: |
General Electric Company
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Appl. No.: | 04/791,750 |
Filed: | January 16, 1969 |
Current U.S. Class: | 363/58 ; 363/136 |
Current International Class: | H02M 1/00 (20060101); H02m 001/18 (); H02h 007/14 () |
Field of Search: | 321/4,11--14,45,45C 307/202 317/53 (Inquired)/ |
3406327 | October 1968 | Mapham et al. |