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US 4,358,820 AGranted
Inverter with individual commutation circuit
AssigneeUnited Technologies Corporation
InventorKenneth Lipman
Life of this patent
Estimating the term…
Abstract
An individual commutation for use with an inverter includes two resonant loops one of which is connected to the main current path adjacent each of the main thyristors. Each resonant loop includes a series coupled commutation capacitor and inductor together with commutation thyristor which is enabled to provide a commutation pulse to extinguish the load current through conducting main thyristor for a sufficient period to allow transition to the nonconducting state.
Claims4
An inverter for receiving electrical energy from a DC source and transforming it to alternating electrical energy at an output bus, comprising:
- main switch means for alternatively connecting one of a pair of input buses to said output bus, said main switch means being translatable to the nonconducting state only when there is no load current therethrough;
- commutation means including a switch means connected in a resonant loop in series with a commutation capacitor and with an inductor, and further including a diode means connected to said resonant loop to clamp said commutation capacitor to the voltage potential of one of said pair of buses;
- and
- whereby when said switch means in said series resonant loop is rendered conductive, said commutation capacitor discharges into said load for a sufficient period of time to allow said main thyristor which is conducting to switch to the off state.
1 more element
Dependencies are inferred from the claim text.