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US 10,650,964 B2Granted
Coil module, wireless power transmitting circuit and wireless power receiving circuit
AssigneeNingbo Weie Electronics Technology Ltd.
InventorsLizhi Xu, Feng Yu, Weiyi Feng
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Abstract
The present application discloses a coil module, a wireless power transmitting circuit and a wireless power receiving circuit. By overlapping a plurality of coils with each other and arranging matched capacitance between adjacent coils and matched capacitance at the output of the coil module, the coupling inductance is increased, the circulating current caused by parasitic capacitance between overlapped coils is effectively reduced and charging efficiency is improved while the cross-sectional area of the coil is kept constant.
Claims10
A coil module comprising:
- N coils wound in a planar manner and overlapped with each other;
- N−1 first capacitances, the i-th first capacitance is disposed between the i-th coil and the i+1-th coil to form a series circuit of N coils and N−1 capacitances, wherein i=1 to N−1 and N is greater than or equal to 2;
- and
- a second capacitance connected in series at one end of the series circuit of the N coils and the N−1 capacitances.
1 more element
Dependencies are inferred from the claim text.