| CPC H01T 23/00 (2013.01) [H01T 19/04 (2013.01)] | 9 Claims |
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1. A static eliminator that releases ions to an object to eliminate static electricity of the object, the static eliminator comprising:
an ion generator that generates a corona discharge in response to application of a positive polarity high voltage to generate positive ions, and generates a corona discharge in response to application of a negative polarity high voltage to generate negative ions;
a high voltage application unit that applies the positive polarity high voltage and the negative polarity high voltage to the ion generator;
a ground electrode short-circuited to an earth;
a first detection circuit that detects a first ion current flowing between the earth and the static eliminator via the ground electrode;
a detection electrode different from the ground electrode, the detection electrode being arranged at a position where the positive ions and the negative ions generated by the ion generator arrive;
a second detection circuit that detects a second ion current generated by the positive ions and the negative ions arriving at the detection electrode; and
a feedback control unit that executes feedback control on the high voltage application unit to make the first ion current detected by the first detection circuit be a first target value, and executes feedback control on the high voltage application unit to make the second ion current detected by the second detection circuit be a second target value.
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