Patent ID: 7710751
Filing Date: 2010-05-04
Classification: B60L,H02J,H02M

Abstract:
1. A secondary-side power receiving circuit of noncontact power supplying equipment, comprising: a plurality of pickup coils which are opposed to a primary-side inductive path for passing a high-frequency current and are fed with an electromotive force induced by the inductive path, resonance circuits including resonance capacitors respectively connected in series with the pickup coils and resonating at a frequency of the inductive path, the resonance circuits being connected in series, the resonance circuits respectively including rectifier circuits rectifying voltages generated by the resonance circuits, the rectifier circuits being connected in parallel to supply power to a load having varying power consumption, a switching unit for switching a connected state and an open state between the resonance circuits, and a voltage control unit for controlling an output voltage applied to the load, by controlling the switching unit, wherein the switching unit includes a transformer having a primary-side winding connected in series between the resonance circuits, a rectifier having an input end connected to a secondary-side winding of the transformer, and a switching device connected between the output ends of the rectifier, and the voltage control unit controls the output voltage applied to the load, by opening and closing the switching device of the switching unit.