Patent ID: 9552921
Date: 2017-01-24
CPC Classifications: H01F,H02J,H04B

Claim:
1. A wireless power transmitting apparatus configured to transmit an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field to a wireless power receiving apparatus, the wireless power transmitting apparatus comprising: a transmission antenna comprising a transmission coil; an automatic tuning assist circuit coupled with the transmission antenna; and a power supply configured to apply an AC driving voltage across a series circuit that comprises the transmission antenna and the automatic tuning assist circuit, wherein the automatic tuning assist circuit comprises: a first control unit configured to switch on and off the first switch through the fourth switch in synchronization with the driving voltage, wherein the power supply comprises: a DC power supply; and a first high-side switch and a first low-side switch sequentially arranged in series between an output terminal of the DC power supply and a fixed voltage terminal, and wherein the transmission antenna and the automatic tuning assist circuit are coupled in series between a connection node that connects the first high-side switch and the first low-side switch and the fixed voltage terminal.