Wireless power transmitting device and wireless power receiving device

摘要

A loop antenna includes: a pair of first linear elements, a feed point connected with each of the first linear elements, a first variable impedance element, one end of which is connected with one end of the first linear elements, a second variable impedance element, one end and the other end of which are electrically connected with the other end of the first variable impedance element and the other end of the first linear elements, and a second linear element, one end and the other end of which are electrically connected with the other end of the first variable impedance element and the other end of the first linear elements. A self-resonance coil receives power fed to the feed point of the loop antenna and transmits the received power to a receiving self-resonance coil.

主权项

1. A wireless power transmitting device comprising:
a loop antenna including: (A) a pair of first linear elements, (B) a feed point connected with one end of each of the first linear elements, (C) a first variable impedance element, one end of which is connected with the other end of one of the first linear elements, (D) a second variable impedance element, one end of which is electrically connected with the other end of the first variable impedance element and the other end of which is electrically connected with the other end of the other of the first linear elements, (E) a second linear element, one end of which is electrically connected with the other end of the first variable impedance element and the other end of which is electrically connected with the other end of the other of the first linear elements; and a self-resonance coil configured to receive, through electromagnetic coupling to the loop antenna, power fed to the feed point of the loop antenna, and to transmit the received power to a receiving self-resonance coil through magnetic resonance; and a controller which sets an initial value of the first variable impedance element to a value different from a maximum value and a minimum value of the first variable impendence element and sets an initial value of the second variable impedance element to a value different from a maximum value and a minimum value of the second variable impedance element.