Wireless power transmitter and wireless power receiver

A wireless power receiving apparatus configured to receive an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field, transmitted from a wireless power transmitting apparatus, the wireless power receiving apparatus comprising:

• a reception antenna comprising a reception coil;
• and
• an automatic tuning assist circuit coupled with the reception antenna;
• wherein the automatic tuning assist circuit comprises:
• a first terminal;
• a second terminal;
• a fifth switch and a sixth switch arranged in series between the first terminal and the second terminal;
• a seventh switch and an eighth switch sequentially arranged in series between the first terminal and the second terminal such that they are arranged in parallel with the fifth switch and the sixth switch;
• a second auxiliary capacitor arranged between a connection node that connects the fifth switch and the sixth switch and a connection node that connects the seventh switch and the eighth switch;
• and
• a second control unit configured to switch on and off the fifth switch through the eighth switch.

An automatic tuning assist circuit employed in 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 via a transmission coil, and coupled with the transmission coil, the automatic tuning assist circuit comprising:

• at least one auxiliary capacitor;
• four switches arranged in order to charge and discharge the aforementioned at least one auxiliary capacitor using a resonance current that flows through the transmission coil;
• and
• a first control unit configured to switch on and off the four switches so as to generate a capacitor voltage across the aforementioned at least one auxiliary capacitor, and to apply, to the transmission coil, a correction voltage that corresponds to the capacitor voltage that develops at the aforementioned at least one auxiliary capacitor.

An automatic tuning assist circuit employed in a wireless power receiving apparatus configured to receive an electric power signal comprising any one from among an electric field, a magnetic field, or an electromagnetic field transmitted from a wireless power transmitting apparatus, and coupled with the reception coil, the automatic tuning assist circuit comprising:

• at least one auxiliary capacitor;
• four switches arranged in order to charge and discharge the aforementioned at least one auxiliary capacitor using a resonance current that flows through the reception coil;
• and
• a second control unit configured to switch on and off the four switches so as to generate a capacitor voltage across of the aforementioned at least one auxiliary capacitor, and to apply, to the reception coil, a correction voltage that corresponds to the capacitor voltage that develops at the aforementioned at least one auxiliary capacitor.