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Method and apparatus for wirelessly transmitting charging power

A wireless power and charging power technology, applied in output power conversion devices, charging stations, exchanging data chargers, etc., can solve problems such as faults and excessive power consumption

Active Publication Date: 2021-06-18
WITRICITY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can cause excessive power dissipation in the IPT driver switch or cause failure of the IPT driver switch

Method used

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  • Method and apparatus for wirelessly transmitting charging power
  • Method and apparatus for wirelessly transmitting charging power
  • Method and apparatus for wirelessly transmitting charging power

Examples

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Embodiment Construction

[0028] The detailed description set forth below with reference to the accompanying drawings is to describe some embodiments and not merely to represent the embodiments. The detailed description includes specific details to provide a thorough understanding of the embodiments. In some instances, some devices are shown in block diagram form.

[0029] Transferring power wirelessly refers to transferring any form of energy associated with electric, magnetic, electromagnetic fields, etc., from a transmitter to a receiver without the use of physical electrical conductors (eg, power can be transferred through free space). Power transfer may be achieved by receiving, capturing, or coupling out power into a wireless field (eg, a magnetic field) through a "receive coil."

[0030] Electric vehicles are used herein to describe long-range systems, an example of which is a vehicle that includes, as part of its locomotive capabilities, electrical power derived from a rechargeable energy stor...

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PUM

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Abstract

Systems, methods, and devices are provided that implement hybrid symmetric and asymmetric control for soft handover in wireless power transfer applications. An apparatus for wirelessly transferring charging power is provided. The device includes a wireless power coupler. The device includes a driver circuit. The device includes a control unit configured to instruct a drive circuit to drive the wireless power coupler with a first voltage waveform when less than a first amount of wireless charging power is delivered. The first voltage waveform includes a positive portion having a first duration and a negative portion having a first duration. The control unit is further configured to instruct the drive circuit to drive the wireless power coupler with a second voltage waveform comprising a positive portion having a second duration and having a value not equal to the second duration when transmitting wireless charging power greater than the first amount. The negative part of the third duration of the duration.

Description

technical field [0001] The present disclosure relates generally to wireless power transfer, and more particularly, to systems, methods, and devices that implement hybrid symmetric and asymmetric control for soft handover in wireless power transfer applications. Background technique [0002] Inductive power transfer (IPT) systems provide one example of wireless transfer of energy. In an IPT system, a primary power device (or "transmitter") wirelessly transmits power to a secondary power device (or "receiver"). Each of the transmitter and receiver includes an inductive coupler, which is typically a single coil or multi-coil arrangement (such as litz wire) comprising a winding of current carrying material. AC current passing through the main coupler creates an AC magnetic field. When the secondary coupler is placed adjacent to the primary coupler, an alternating magnetic field induces an electromotive force (EMF) in the secondary coupler according to Faraday's law, thereby wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J50/80H02M3/337H02J7/02B60L53/12
CPCB60L2210/30B60L2210/40B60L2270/147H02J50/12H02J50/80Y02T10/7072Y02T90/14H02J7/00034B60L53/126Y02T10/70Y02T10/72H02M1/0058H02M3/33573H02M3/01Y02T10/92Y02T90/12
Inventor F·维德纳M·帕夫洛夫斯基
Owner WITRICITY CORP