| 摘要 |
A grid electrode voltage control aparatus is for a scorotron charging device having a corona discharge electrode operatively connected to a corona producing power source and disposed opposite a counter electrode, and a grid electrode disposed between the corona discharge electrode and the counter electrode. A shunt-regulated stabilized power supply is operatively connected to the grid electrode and has an output variably responsive to the intensity of current flowing through the grid electrode. A series-regulated stabilized power supply (preferably comprising a dc-dc converter and a current limiter) is operatively connected to the shunt-regulated stabilized power supply. A controller is operatively connected to the shunt-regulated stabilized power supply and the series-regulated stabilized power supply for controlling the output of the shunt-regulated stabilized power supply by controlling the series-regulated stabilized power supply in one of first and second modes wherein said series-regulated stabilized power supply supplies current to the shunt-regulated stabilized power supply in the first mode of the control and interrupts the supply of current to the shunt-regulated stabilized power supply in the second mode of the control.
|
