| 摘要 |
PROBLEM TO BE SOLVED: To rapidly allow the charge energy remaining in a floating condenser between a nozzle and ground and a condenser in a voltage doubler circuit for generating high DC voltage to become extinct after the generation of high DC voltage is stopped by the operation of a safety circuit. SOLUTION: A positive high voltage generation circuit is additionally provided separately from a negative high voltage generation circuit used in electrostatic coating and the output thereof is connected to the nozzle through a current-limiting high resistor. When abnormality is detected in an output current, the generation of negative high voltage is stopped and the positive high voltage generation circuit is operated for a short time at the same time to rapidly neutralize charge remaining in the respective condensers to allow the same to become extinct. COPYRIGHT: (C)2003,JPO
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