Protective circuit with feedback capability for two-point and th

Details Protective circuit with feedback capability for two-point and th Protective circuit with feedback capability for two-point and th

1993-07-27

1994-08-23

Stephan, Steven L.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 28, H02M 7122

Patent

active

053412834

ABSTRACT:
In a two-point or three-point inverter, a feedback circuitry is provided, which is disposed in parallel with a feedback capacitor (CR), and essentially include a semiconductor valve (SR) and a transformer (TR). As a result of switching the semiconductor valve (SR) once, the energy of the protective-circuit reactances, which have been stored in the feedback capacitor, is fed back into the link-circuit voltage source by the transformer. The arrangement according to the invention is distinguished by a high efficiency, accompanied at the same time by high turn-on/turn-off frequency of the semiconductor switch.

REFERENCES:
patent: 4257092 (1981-03-01), Prines et al.
patent: 4703411 (1987-10-01), Umbricht
patent: 4769754 (1988-09-01), Reynolds et al.
patent: 5237225 (1993-08-01), Gruning

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