Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1981-06-30
1983-08-23
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 37, 363 49, H02P 1322
Patent
active
044007671
ABSTRACT:
A switching regulator power supply operates at a variable high frequency with low power dissipation and a minimum of complexity. The transformer primary windings are included as part of a self starting circuit which starts a pulse generator having a fixed pulse width and variable frequency. During a first cycle of operation, the self starting circuit in response to the input rectified AC power after a predetermined period of time applies sufficient voltage which enables the pulse generator to begin generating a first output pulse of fixed pulse width. This causes the primary windings to store energy and feedback energy to the self starting circuit which increases the voltage applied to the generator causing it to begin normal operation at maximum frequency. An error circuit coupled to the secondary winding compares the output DC supply voltage to a reference voltage and generates an error signal which is applied through a DC coupling circuit for adjusting the frequency of the pulse generator to existing line and load conditions.
REFERENCES:
patent: 3487234 (1969-12-01), Morgan
patent: 4121282 (1978-10-01), Ohsawa
patent: 4236198 (1980-11-01), Ohsawa et al.
patent: 4246634 (1981-01-01), Purol
patent: 4302803 (1981-11-01), Shelly
patent: 4353112 (1982-10-01), Rietveld et al.
Moorman, "Transistor Switching Regulator Start Circuit," IBM Technical Disclosure Bulletin, vol. 13, No. 9, pp. 2763, 2764, Feb. 1971.
Beha Jr. William H.
Driscoll Faith F.
Honeywell Information Systems Inc.
Prasinos Nicholas
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