Electric power conversion systems – Cascaded or combined – diverse conversions in which the... – Current and frequency
Patent
1981-10-16
1984-06-05
Beha, Jr., William H.
Electric power conversion systems
Cascaded or combined, diverse conversions in which the...
Current and frequency
323226, 363 95, 363124, H02P 1320
Patent
active
044532059
ABSTRACT:
A circuit including a dc/ac converter for supplying an ac consumer with an alternating voltage, such as a sinusoidal voltage, from a dc voltage source has an auxiliary load circuit which is connected in parallel with the ac consumer, the auxiliary load circuit being switched into the overall circuit by a controlled switching element. The control electrode of the controlled switching element is connected to the output of a voltage comparator, having inputs respectively supplied with an actual voltage derived from the voltage being used by the ac consumer and a theoretical signal derived from the output voltage of the dc/ac converter or from a reference oscillator which controls the converter. The controlled switching element becomes conductive when, as a result of the release of electrical or magnetic energy stored in reactive impedance components, the voltage used by the ac consumer exceeds an instantaneous value of the theoretical signal.
REFERENCES:
patent: 4244015 (1981-06-01), Beebe
patent: 4340931 (1982-07-01), Endo et al.
patent: 4359679 (1982-11-01), Regan
Conference; 2nd International Conference on Electrical Variable, Speed Drives, pp. 136-139, (Sep. 22-27, 1979), London, England.
IBM Technical Disclosure Bulletin, vol. 24, No. 3, pp. 1437-1438, Aug. 1981.
Aritcle Entitled "Uninterruptible AC Power Supply System, Type BZV 102", A. Hansson, Ericsson Review No. 1, 1979.
Article Entitled "Modulating the Flyback Inverter Reduces Supply's Bulk", V. Brunstein, Electronics/Aug. 2, 1979, p. 119.
Article Entitled "Power Inverter Achieves Efficiency of Over 90% for Low Outputs", A. Erickson, Electronics/Dec. 6, 1979, pp. 69-70.
Beha Jr. William H.
Siemens Aktiengesellschaft
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