Current overload protection for inverter of uninterruptible powe

Details Current overload protection for inverter of uninterruptible powe Current overload protection for inverter of uninterruptible powe

1981-03-23

1983-10-18

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 56, 363 41, 363 98, H02H 7122

Patent

active

044109350

ABSTRACT:
Current overload protection is provided for an inverter of an uninterruptible power supply system; a shutdown circuit responds when a current overload is present, and a plurality of at least three comparators having different input threshold and different time delays at their respective outputs operate such that when an extreme overload occurs, the inverter will be shut down immediately, whereas it will be shut down after predetermined longer periods with correspondingly lesser amounts of current overload present.

REFERENCES:
patent: 3659186 (1972-04-01), Machida et al.
patent: 4000446 (1976-12-01), Vandevier
patent: 4013938 (1977-03-01), McCoy
patent: 4038695 (1977-07-01), DePuy
patent: 4071812 (1978-01-01), Walker
patent: 4121281 (1978-10-01), Banga
patent: 4167776 (1979-09-01), Nygaard
patent: 4250532 (1981-02-01), Davis
patent: 4316097 (1982-02-01), Reynolds
patent: 4325095 (1982-04-01), Hart
Conference: IAS Annual Meeting 1980, Cincinnati, OH, USA, 28 Sep.-3 Oct. 1980, pp. 705-714.
Fuji Elect. Rev. (Japan), vol. 24, No. 2, pp. 67-71, 1978.
Conference: INTELEC. 79, International Telecommunications Energy Conference, Wash., D.C., USA, pp. 350-353, (26-29 Nov. 1979).

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