TRANSMITTING COIL STRUCTURE AND WIRELESS POWER TRANSMITTING TERMINAL USING THE SAME

摘要

Disclosed are a transmitting coil structure and wireless power transmitting terminal using the transmitting coil structure. The transmitting coil has a first winding and a second winding connected in parallel, so that the transmitting coil has a smaller inductance than the conventional transmitting coil in the condition of the same spatial magnetic field. When the receiving terminal is near the transmitting coil, the inductance of the transmitting coil is smaller, and the influence of the receiving terminal to the inductance of the transmitting coil is reduced significantly, and the effect to the impedance matching of the primary side transmitting coil and the resonant capacitor will not be too large, so as to improve the power transmission efficiency of the system.

主权项

1. A transmitting coil structure, comprising a coil and a radiation plate, wherein the coil includes an input end, an output end, a first winding and a second winding, and the input end and the output end are two adjacent end points on the same plane;
the first winding has a first end coupled to the input end, and a second end coupled to the output end, and the second winding has a first end coupled to the output end and a second end coupled to the input end; and the first winding and the second winding are wound symmetrically by using the central vertical line connected between the input end and the output end as an axis of symmetry to jointly form a N-turn coil, and N≧1.