Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1976-06-25
1978-01-03
Shoop, William M.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 97, H02M 112
Patent
active
040670570
ABSTRACT:
A regulated DC to AC power converter of the switching type for providing AC power at a selected output frequency, e.g., 50 Hz, is disclosed. The converter, which eliminates the need for an inverter transformer, is switched at a switching frequency which is considerably higher than the output frequency, e.g., 10 KHz. Due to the high switching rate the converter filter can be designed with small and lightweight components to provide a desired pass band, which includes the output frequency and harmonics thereof, and provides sufficient attenuation for the switching frequency and its higher harmonics, so as to produce an output with very low ripple or waveform distortion. Due to the high switching frequency the output waveform can be regulated with a response time of a fraction of a cycle. The converter includes a modulator section with a unique arrangement to control the switching of the switches between their On and Off states. In preferred embodiments of the converter the switches are implemented with transistors to form AC power at high power levels. Each switch includes a plurality of relatively inexpensive transistors which are connected in parallel with each transistor drawing only a small portion of the total current through the switch. A novel arrangement is employed to increase switch reliability by preventing its failure even though one or more of its transistors may fail in a short-circuit state. For switches implemented with transistors the extended turn-off time of the transistors, due to their saturated states, is accommodated by controlling the turning On of each switch to occur only after the transistors of the previously turned On switch returned to their Off state.
REFERENCES:
patent: 3017558 (1962-01-01), Kozacka
patent: 3278827 (1966-10-01), Corey et al.
patent: 3321697 (1967-05-01), Etter
patent: 3406328 (1968-10-01), Studtmann
patent: 3521150 (1970-07-01), Bates
patent: 3559028 (1971-01-01), Studtmann
patent: 3649902 (1972-03-01), Dunbar
patent: 3715649 (1973-02-01), Ravas
Principles of Inverter Circuits, B. D. Bedford & R. G. Host, John Wiley & Sons, Inc., New York, Dec. 1964, pp. 166-168, 300-301, 310-313.
Electronic Design 25, Dec. 6, 1974, pp. 54-59.
Pauly Raymond W.
Taddeo Fausto V.
Pacific Electronic Enterprises Inc.
Shoop William M.
LandOfFree
DC to AC switching converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with DC to AC switching converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC to AC switching converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-284635