摘要:
Power reception equipment (20) is provided with: a secondary side resonance coil (21b) which receives power from a primary side resonance coil (13b) of power supply equipment (10); and a rectifier (23) which rectifies the received power. The power reception equipment is further provided with: a secondary matching unit (22) which is provided between the secondary side resonance coil (21b) and the rectifier (23); a charger (24) to which rectified electric power is supplied; a power storage device (25) which is connected to the charger; and a control unit (26) which adjusts the secondary matching unit when the power storage device is being charged. The control unit stores, as data on a storage device (33), the relationship between the charge power from the power supply equipment during the power ascension phase and the matching status of the secondary matching unit (22) when charging. During the phase in which the power output from the supply equipment is reduced, the control unit adjusts, on the basis of the data stored in the storage device during the power ascension phase, the secondary matching unit (22) so as to reach a suitable status corresponding to the charge power.
摘要:
Provided is a DC-DC converter that can reduce losses. Ein and C1 are serially connected. Q1 and Q2 are serially connected so that antiparallel diodes thereof face the same direction. A terminal of C1 that is not connected to Ein and a terminal of Q2 that is not connected to Q1 are connected. A terminal of Ein that is not connected to C1 and a terminal of Q1 that is not connected to Q2 are connected. A coil N1 of T is connected between a connection point of Ein and C1 and a connection point of Q1 and Q2. Among a pair of terminals of a coil N2, a terminal having the same polarity as a terminal the coil N1 that is connected to Ein is connected to the connection point of C1 and Q2 through D1 and the other terminal is connected to the connection point of Ein and C1. A coil N3 is connected to a smoothing circuit through a rectification circuit. The direction of D1 is set in such a manner that energy can be transferred to C1 from the coil N2 when Q1 is in a conduction state. The rectification circuit applies a voltage of the same polarity to the smoothing circuit in both case where $1 is in a conduction state and Q2 is in a conduction state.