Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1981-02-13
1983-03-15
Pellinen, A. D.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
323243, 323266, 361 92, 363 54, 363 88, H02H 106, H02H 7122
Patent
active
043769683
ABSTRACT:
When a-c power line voltage is rectified by a phase-controlled SCR rectifier bridge to develop an adjustable d-c bus voltage which is then converted by an inverter back to a-c for driving a load, such as a motor, line voltage disturbances, resulting from momentary power outages or major power reductions, will have a deleterious effect on the operation of the inverter system. Such disturbances will cause improper firing of the SCR's and the d-c bus voltage may increase considerably, disrupting the normal operation of the inverter system and possibly destroying the switching devices in the inverter. Immunization against the effects of the line voltage disturbances is obtained by shutting down or disabling the phase-controlled SCR rectifier bridge anytime such a disturbance occurs. In this way, while the output voltage of the rectifier bridge is effectively interrupted during the occurrence of each line voltage disturbance, the inverter will continue to operate in near normal manner in response to the d-c voltage provided by the filter capacitor. At the conclusion of each disturbance, the operation of the rectifier bridge will be slowly restored to normal to avoid overshoot of the d-c bus voltage.
REFERENCES:
patent: 3473039 (1969-10-01), Fegley
patent: 3836839 (1974-09-01), Becky
patent: 3848175 (1974-11-01), Demarest
patent: 3986100 (1976-10-01), Beierholm et al.
patent: 4027204 (1977-05-01), Norbeck
patent: 4042871 (1977-08-01), Grubbs et al.
patent: 4139885 (1979-02-01), Overzet
patent: 4218728 (1980-08-01), Chambers et al.
patent: 4315305 (1982-02-01), Siemon
Kraengel, "One-Shot Serving as Missing Pulse Dectector Spots Loss of AC Line Voltage Quickly", Electronic Design 11, May 24, 1979, p. 164.
Siemon Edward C.
Wueschinski Russel P.
Borg-Warner Corporation
Pellinen A. D.
Tracy James E.
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