Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

Wireless energy transfer systems

Described herein are improved configurations for a wireless power converter that includes at least one receiving magnetic resonator configured to capture electrical energy received wirelessly through a first oscillating magnetic field characterized by a first plurality of parameters, and at least one transferring magnetic resonator configured to generate a second oscillating magnetic field characterized by a second plurality of parameters different from the first plurality of parameters, wherein the electrical energy from the at least one receiving magnetic resonator is used to energize the at least one transferring magnetic resonator to generate the second oscillating magnetic field.

Wireless energy transfer converters

Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured for energy transfer with a second resonator structure over a distance D larger than characteristic sizes, [insert formula] and [insert formula], of the first and second resonator structures. A power generator is coupled to the first structure and configured to drive the first resonator structure or the second resonator structure at an angular frequency away from the resonance angular frequencies and shifted towards a frequency corresponding to an odd normal mode for the resonator structures to reduce radiation from the resonator structures by destructive far-field interference.

Wireless energy transfer, including interference enhancement

A variable type magnetic resonator includes an array of resonators each having one of at least two substantially different magnetic dipole moment orientations and at least one power and control circuit configured to selectively connect to and energize at least one of the array of resonators.

Wireless energy transfer using variable size resonators and system monitoring

Described herein are improved configurations for a device for wireless power transfer that includes a conductor forming at least one loop of a high-Q resonator, a capacitive part electrically coupled to the conductor, and a power and control circuit electrically coupled to the conductor, the power and control circuit providing two or more modes of operation and the power and control circuit selecting how the high-Q resonator receives and generates an oscillating magnetic field.

Wireless energy transfer using repeater resonators

The apparatus includes an address information writer that writes address information representing the position of the unit sectors in the recording medium when recording the hologram in each of the unit sectors, an address information reader that reads out the address information from the recording medium when reproducing the hologram from the plurality of unit sectors where the hologram is recorded, and an illumination position controller that sequentially positions the illumination spot only containing the reference beam on the plurality of unit sectors based on the address information read out, and relatively displaces the illumination spot from one of the unit sectors to another through a shortest path.

Apparatus and method for recording and reproducing hologram

A magnetic resonance electric power-transmitting apparatus in the magnetic resonance wireless electric power transmission system includes a resonance coil, an electric power-supplying unit which supplies electric power to the resonance coil to cause the resonance coil to generate a magnetic field, a magnetic material which varies a magnetic field generated by the resonance coil, and a position adjustment unit which adjusts a positional relationship between the resonance coil and the magnetic material.

Magnetic resonance electric power-transmitting apparatus and magnetic resonance electric power-receiving apparatus

A non-contact charging apparatus configured to, vary the inductance and the capacitance of the matching unit for matching the impedance of the power supply system that supplies alternate current power and the impedance of the power transmitting/receiving system including a power transmitting unit and a power receiving apparatus according to the variable information.

Non-contact charging apparatus and non-contact charging method

A power receiver includes a power receiver coil, a secondary battery, a load resistor, a switch, and a power receiver controller. The power receiver coil is configured to wirelessly receive power from a power source, and the secondary battery is configured to be charged by power from the power receiver coil. The switch is configured to selectively connect the power receiver coil to the secondary battery or the load resistor, and the power receiver controller is configured to control the switch in accordance with a power supply state of the power source based on the power receiver coil, and a charged state of the secondary battery.

Power receiver, power source, and wireless power transfer system

PROBLEM TO BE SOLVED: To provide a contactless power transmission device for charging electricity simultaneously to power receiving devices differing in charge power.SOLUTION: A power transmission device includes: a power transmission-system coil for receiving power from an AC power source; a power receiving-system coil having a secondary side resonance coil for receiving power by electromagnetic induction from the power transmission-system coil due to magnetic field resonance occurring between the power transmission-system coil and itself and a secondary side coil for receiving power by electromagnetic induction from the secondary side resonance coil; a first bridge circuit having a switching element connected to the secondary side resonance coil; a first phase detection unit for detecting the first phase of a voltage supplied to the power transmission-system coil and the second phase of a current flowing in the power receiving-system coil; and a first resonance frequency control unit for varying the resonance frequency of the power receiving-system coil by varying the duty ratio or phase of a pulse voltage for driving the switching element of the first bridge circuit so that a phase difference between the first phase and the second phase detected by the first phase detection unit becomes equal to a first target value.

Satoshi Shimokawa

Papers

Apparatus and method for recording and reproducing hologram

Magnetic resonance electric power-transmitting apparatus and magnetic resonance electric power-receiving apparatus

Non-contact charging apparatus and non-contact charging method

Power receiver, power source, and wireless power transfer system

Power transmission device, power receiving device, and transmission apparatus