Secondary side power receiving circuit of non-contact power feeding equipment and saturable reactor used in this secondary side power receiving circuit

摘要

PROBLEM TO BE SOLVED: To provide a secondary side power reception circuit of a non-contact power supply facility capable of stably supplying power at the voltage required from a load, without depending on a saturation voltage of a saturable reactor that fluctuates because of change in ambient temperature and magnetic characteristic of a magnetic core.SOLUTION: A current circuit 41 is provided in which a saturable reactor 15, consisting of a magnetic core and a primary coil 33 wound on the magnetic core, is connected to a resonance circuit 13, and two bias coils 36 and 37 having the same length and same characteristic are wound on the magnetic core and connected in series for opposite polarities. Here, when a both-end voltage (a voltage applied to a load 18) of an output capacitor 19 comes to be a target voltage or higher that is required by the load 18, a DC bias current flows the bias coils 36 and 37. The saturable reactor 15 is saturated when the bias current flows, and a voltage applied to the load 18 is suppressed to the target voltage required by the load 18.