Electric circuit for pulse energized electrostatic precipitator and pulse energized electrostatic precipitator using this circuit

摘要

An electrostatic precipitator circuit has an input terminal supplied DC voltage, an output terminal connected to a precipitating capacitor, a storage capacitor connected between ground potential and the input terminal, and a recovery capacitor whose one electrode is applied with ground potential. The circuit further includes a current path switching unit having a common terminal and first and second switch terminals to be connected to the common terminal, the common terminal being connected to a non-ground electrode of the storage capacitor. The circuit further includes a first current path having a serial circuit of an inductor and a diode for connecting the first switch terminal to the output terminal, a second current path having a serial circuit of an inductor and a diode for connecting the output terminal to the non-ground electrode of the recovery capacitor, and a third current path having a serial circuit of an inductor and a diode for connecting the non-ground electrode of the recovery capacitor to the second switch terminal.!