To provide a highly effective charging apparatus by alleviating a load of a DC current source.
This charging apparatus comprises a DC current source 1, a switching means 2 for switching the current output from this DC current source 1, an output means 3 for supplying a charging current i0 output from the switching means 2 to a charging object 5, consisting of a capacitive load and a control means 4 for controlling the switching means 2. The control means 4 generates a pulse so that it is turned on for a period (a) and is turned off for a period b in order to control the switching means 2. The control means 4 controls, on the basis of the difference between a voltage V1 generated from the DC current source 1 and a voltage V0 of the charging object 5, the duty ratio (a/(a+b)) of the control pulse, so as to control the average current of the charging current i0 output from the output means 3 to the constant value.
NIIKURA HIDEO
KYODO YASUMASA
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