Power supplier for on-line electric vehicle and driving method thereof, control circuit for power supplier

PURPOSE: A power supplier for an on-line electric vehicle and a driving method thereof, a control circuit for power supplier are provided to reduce the frequency ripple regardless of the length of a feeder and to generate constant current. CONSTITUTION: A voltage conversion part(200) converts AC power into DC voltage. The voltage conversion part changes the level of the DC voltage. An inverter(210) is connected to a switching element. A control unit classifies the frequency band of current signal. The control unit generates a first control signal and a second controlling signal based on the frequency band. [Reference numerals] (220) Control unit; (230) Load