Apparatus for wireless power transfer, apparatus for wireless power reception and coil structure

A wireless power transmitting device, comprising:

• a bowl-shaped transmitting device body;
• and
• a transmitting coil unit for wirelessly transmitting power to a receiving device,
• wherein the transmitting coil unit comprises:
• a multi-loop coil unit wound in a bottom of the transmitting device body;
• and
• a helical coil unit wound around a side wall of the transmitting device body, and wound to increase a radius of a coil loop in a direction to an upper part,
• wherein the multi-loop coil unit is supplied with power from a first AC source, and the helical coil unit is supplied with power from a second AC source,
• further comprising a control unit for obtaining sensing data of power received by the receiving devices, and for controlling output power of the first AC source and the second AC source based on the sensing data.

A wireless power transmitting device, comprising:

• a bowl body;
• a multi-loop coil unit for generating magnetic field for supplying wireless power, from a bottom surface of the bowl body;
• and
• a helical coil unit for supplying wireless power from a side wall of the bowl body,
• wherein the wireless power transmitting device generates magnetic field for supplying wireless power to cover a wider spatial area compared to when the multi-loop coil unit and the helical coil unit are separately arranged,
• wherein a receiving device may be arranged in any direction.

A wireless power receiving device, comprising:

• a bowl-shaped receiving device body;
• and
• a receiving coil unit for receiving power supplied from a wireless power transmitting device,
• wherein the receiving coil unit comprises:
• a multi-loop coil unit wound in a bottom surface of the receiving device body;
• and
• a helical coil unit wound around a side wall of the receiving device body, and wound to increase a radius of a coil loop in a direction to an upper part.

A wireless power receiving device, comprising:

• a box-shaped receiving device body;
• and
• a receiving coil unit for receiving power supplied from a wireless power transmitting device,
• wherein the receiving coil unit comprises:
• a multi-loop coil unit wound in a bottom of the receiving device body in rectangular shape.