| 摘要 |
A power supplying apparatus for use in an electrophotographic apparatus. A switching device outputs an output current when a pulse of an input current is applied thereto, a switching control device controls a switching operation of the switching device by applying the pulse, and a transformer, a primary winding of which is connected with an output terminal of the switching device, generates a prescribed output voltage at its secondary winding by stepping-up an input voltage induced at the primary winding. The power supplying apparatus further includes a rectifying-smoothing device connected with the secondary part of the transformer, which rectifies and smooths an output current of the transformer, a parallel resistance member connected in parallel with the secondary winding of the transformer by the rectifying-smoothing device, and an output terminal with a first side connected with a higher potential terminal of the parallel resistance and a second side connected with a process device of the electrophotographic apparatus grounded. The switching control device controls the switching operation of the switching device in a first mode such that a prescribed amount of constant current flows through the output terminal and in a second mode such that no current flows through and a prescribed voltage is induced at the output terminal.
|
