| 摘要 |
PURPOSE:To optimize EP operation and improve dust collection efficiency through increasing of dust wipeout efficiency by permitting polarity inversion at any time in accordance with a change in EP change characteristics or EP operation status. CONSTITUTION:A high voltage transformation rectifier 1 is provided with both negative pole terminal 6 and positive pole terminal 7. EP and ground connections are selected for each terminal by means of a selector 12 in accordance with selection of EP positive and negative charges. For instance, when the charge is negative, the negative pole terminal 6 is connected to the EP side by the selector 12 and the positive pole terminal 7 to the grounding side. EP has normally a few to several dozens of power supply devices in accordance with EP capacity charging subdivisions, and charging polarity is selectable per individual power supply device. Subsequently, minute charge control can be performed and dust collection performance improved.
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