Regulated high voltage AC power supply with regulated D.C. bias

Details Regulated high voltage AC power supply with regulated D.C. bias Regulated high voltage AC power supply with regulated D.C. bias

1975-09-26

1977-07-26

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

323 20, 323 22T, 361225, 363134, H01T 1900, H02M 7515

Patent

active

040385930

ABSTRACT:
A circuit for concurrently producing regulated high voltage a.c. current and bias d.c. current on one output line, where all regulation is accomplished in low voltge circuits, power supply being particularly useful as the power source for copier and duplicator corotrons. The basic wave shape is a rectangular wave which is amplified and regulated for application as the a.c. input to a corotron. The corotron itself is used as the rectifier for the d.c. bias current, with this current being variable in either the positive or negative direction by varying the symmetry of the a.c. rectangular wave. Since the part of the wave which has the shorter duration must have the higher amplitude, and current in the corotron increases with voltage, a feedback loop which controls the rectangular wave duty cycle will regulate the d.c. bias current as well.

REFERENCES:
patent: 3701937 (1972-10-01), Combs
patent: 3702434 (1972-11-01), Ryan
patent: 3819942 (1974-06-01), Hastwell et al.
patent: 3887861 (1975-06-01), Anzai et al.
patent: 3909702 (1975-09-01), Hart

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