Voltage controlled power supply for electrostatic coating appara

Details Voltage controlled power supply for electrostatic coating appara Voltage controlled power supply for electrostatic coating appara

1979-06-29

1981-05-05

Pellinen, A. D.

Electricity: electrical systems and devices

Electric charging of objects or materials

Particulate matter

118663, 239691, 323235, B05B 502

Patent

active

042662621

ABSTRACT:
A power supply for generating a high unidirectional voltage at a charging electrode of an electrostatic spray coating apparatus has circuitry for sensing the magnitude of current flow to the electrode and for controlling application of an input voltage to the power supply in accordance therewith to control the magnitude of the high voltage. The arrangement is such that whenever the current flow is less than a predetermined value all cycles of the input voltage are applied to the power supply, but whenever the current exceeds the predetermined value only a limited number of the cycles are applied to the power supply. In this manner, the danger of arcing between the electrode and an article being coated is eliminated or at least significantly reduced.

REFERENCES:
patent: 3048498 (1962-08-01), Juvinall et al.
patent: 3504204 (1970-03-01), Carrive
patent: 3544844 (1970-12-01), Pellegrino
patent: 3599038 (1971-08-01), Skidmore
patent: 3735241 (1973-05-01), 0'Sullivan
patent: 3893006 (1975-07-01), Algeri et al.
patent: 3917962 (1975-11-01), Pascente
patent: 3927349 (1975-12-01), Suhren et al.
patent: 3950657 (1976-04-01), Sheng et al.
patent: 4000443 (1976-12-01), Lever
patent: 4075677 (1978-02-01), Bentley
GE Application Note 200.62, "Photon Couplers", Jun. 1972, pp. 13, 19, 20.

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