Power supply for an electrostatic air cleaner with a modulated p

Details Power supply for an electrostatic air cleaner with a modulated p Power supply for an electrostatic air cleaner with a modulated p

1983-12-30

1985-12-31

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

55105, 361 92, 361235, 363 56, B03C 366

Patent

active

045625220

ABSTRACT:
A power supply usable with various size loads has an input circuit receiving pulses of voltage at 25 kilohertz. The pulses are modulated in width depending upon the input to a pulse-width modulation IC receiving inputs indicative of the output voltage and current delivered to the load. A backup current limiting circuit comprising a transistor which is biased by the voltage to the load, limits the signal to the pulse-width modulation IC to limit the width of the pulse to maintain the output current within limits.

REFERENCES:
patent: 2822535 (1958-02-01), Fields
patent: 3143403 (1964-08-01), Swensen
patent: 4318168 (1982-03-01), Faxon
patent: 4410934 (1983-10-01), Fathauer et al.
patent: 4447841 (1984-05-01), Kent

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