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

A load impedance decision device, a wireless power transmission device, and a wireless power transmission method are provided. At least one of a distance and an angle between two resonators may be measured. A load impedance may be determined based on at least one of the measured distance and the measured angle. When the distance between the two resonators changes, a high power transfer efficiency may be maintained without using a separate matching circuit. Where the load impedance is determined, a test power may be transmitted. Depending on a power transfer efficiency of the test power, the load impedance may be controlled and power may be wirelessly transmitted from the source resonator to the target resonator.

Load impedance decision device, wireless power transmission device, and wireless power transmission method

An apparatus for wireless power transmission is disclosed. According to an exemplary aspect, the wireless power transmission apparatus includes a high Q low frequency near magnetic field resonator having characteristics of a metamaterial. Accordingly, manufacturing of a compact power supply capable of wirelessly supplying power to mobile communication terminals or multimedia terminals is possible. By using a zeroth-order resonator with a DNG or ENG structure, a small-sized power supply with a simple configuration may be manufactured.

Apparatus for wireless power transmission using high Q low frequency near magnetic field resonator

Provided are a method and apparatus for controlling a resonance bandwidth in a wireless power transmission system. The apparatus may include a source resonator to transfer an electromagnetic energy to a target resonator, and a source resonance bandwidth setting unit to set a resonance bandwidth of the source resonator.

Method and apparatus for controlling resonance bandwidth in a wireless power transmission system

Provided are a method and an apparatus for controlling wireless power transmission. According to an aspect of the present invention, the method for controlling wireless power transmission includes a step of transmitting a wake-up request signal for waking up a target device, a step of receiving a response message from the target device activated by the wake-up request signal, a step of setting demand power based on the response message, and a step of transmitting resonance power to the target device, based on the demand power. So, the power transmission can be stably carried out.

Method and apparatus to control wireless power transform

A MEMS RF-switch is provided for controlling switching on/off of transmission of AC signals. The MEMS RF-switch of the present invention includes: a first electrode coupled to one terminal of the power source; a semiconductor layer combined with an upper surface of the first electrode, and forming a potential barrier to become insulated when a bias signal is applied from the power source; and a second electrode disposed at a predetermined distance away from the semiconductor layer, and being coupled to the other terminal of the power source, wherein the second electrode contacts the semiconductor layer when a bias signal is applied from the power source. Therefore, although the bias signal may not be cut off, free electrons and holes are recombined in the semiconductor layer, whereby charge buildup and sticking can be prevented.

Hong Young Tack

Papers

Load impedance decision device, wireless power transmission device, and wireless power transmission method

Apparatus for wireless power transmission using high Q low frequency near magnetic field resonator

Method and apparatus for controlling resonance bandwidth in a wireless power transmission system

Method and apparatus to control wireless power transform

MEMS RF-switch using semiconductor