Wireless power transmission system
AssigneeMurata Manufacturing Co., Ltd.
InventorsKeiichi Ichikawa, Tsuyoshi Suesada, Hironori Sakai
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Abstract
A power transmission apparatus includes capacitors connected in series between an active electrode and a passive electrode. A power reception apparatus includes capacitors connected in series between an active electrode and a passive electrode. When a capacitance between the active electrodes is represented by Caa, a capacitance between the passive electrodes is represented by Cpp, and reactances of the capacitors are represented by X1, X2, X3, and X4; the active electrodes, the passive electrodes and the capacitors are configured such that Cpp/Caa=X1/X2=X3/X4 and Cpp≧Caa are satisfied. Thus, a wireless power transmission system capable of stabilizing an operation of a load circuit in the power reception apparatus is provided.
Claims20
A wireless power transmission system, comprising:
- a power transmission apparatus configured to supply an alternating current voltage across a first electrode and a second electrode from a feeder circuit, the power transmission apparatus including:
- a first reactance element with a reactance X1, the first reactance element having a first end coupled to the first electrode and a second end coupled to a reference potential of the power transmission apparatus, and
- a second reactance element with a reactance X2, the second reactance element having a first end coupled to the second electrode and a second end coupled to the reference potential of the power transmission apparatus;
- and
- a power reception apparatus configured to apply to a load circuit an alternating current voltage produced between a third electrode facing the first electrode and a fourth electrode facing the second electrode, the power reception apparatus including:
- a third reactance element with a reactance X3, the third reactance element having a first end coupled to the third electrode and a second end coupled to a reference potential of the power reception apparatus, and
- a fourth reactance element with a reactance X4, the fourth reactance element having a first end coupled to the fourth electrode and a second end coupled to the reference potential of the power reception apparatus, and
- wherein, when Caa represents a capacitance produced between the first electrode and the third electrode, Cpp represents a capacitance produced between the second electrode and the fourth electrode, and
- wherein the first, second, third and fourth electrodes and the first, second, third and fourth reactance elements are configured such that Cpp/Caa=X1/X2=X3/X4 and Cpp≧Caa.
Dependencies are inferred from the claim text.