About 59 results
https://drivepatents.com/patents/1393220 · 24 Dec 2025
An annular resonator and a wireless power transmission device are provided. The annular resonator comprises: a structure which includes an upper surface, a lower surface, an outer surface and an inner surface, and which is arranged according to annular sha...
https://drivepatents.com/patents/939465 · 10 Aug 2016
A power transmission device that adjusts the resonance frequency of a plurality of power transmitters with high precision, is provided. The power transmission device includes a first power transmitter and a second power transmitter that respectively adjust...
https://drivepatents.com/patents/947943 · 9 Dec 2015
A power transmitter including first and second power transmission coils affecting each other has: a first power supply for driving the first power transmission coil; a second power supply for driving the second power transmission coil; and a power transmis...
https://drivepatents.com/patents/957945 · 9 Sep 2015
A system includes a primary transmission power supply 1 that provides single frequency power; a transmitter-receiver having plural channels of transmitting antennas 5 that wirelessly transmit power provided from the primary transmission power supply 1 and ...
https://drivepatents.com/patents/950139 · 15 Jul 2015
The power transmission coil (10) of a power-supply device (1) and the power-receiving coil (20) of a power-receiving device (2) are configured so as to satisfy the equation (L2/L1)1/2=G/K, where L1 is the self-inductance of the power transmission coil (10)...
https://drivepatents.com/patents/963298 · 4 Feb 2015
A power transmission device has: a power transmission unit configured to perform wireless power transmission; a communication unit configured to perform wireless communication within a range wider than a power transmission possible range of the power trans...
https://drivepatents.com/patents/963277 · 4 Feb 2015
A wireless power transfer system includes a plurality of power sources and at least one power receiver, in which power transfer from the power sources to the power receiver is performed in wireless by using magnetic field resonance or electric field resona...
https://drivepatents.com/patents/966041 · 24 Dec 2014
Provided are a power supply device, a power receiving device, a charging system, and an obstacle detection method that obtain a sufficient obstacle detection sensitivity even when an obstacle is small. A modulation unit (202) performs amplitude modulation ...
https://drivepatents.com/patents/966385 · 10 Dec 2014
The present disclosure relates to a wireless power transfer method, a wireless power transmitter and a wireless charging system in a wireless power transfer field. That is, a wireless power transmitter configured transfer power to a wireless power receiver...
https://drivepatents.com/patents/966679 · 3 Dec 2014
The present invention provides a power transmission device for inductive energy transfer. The power transmission device comprises a first stage (210) adapted to be connected to a supply input voltage and adapted to convert the supply input voltage to an op...