Systems and methods for reducing parasitic losses in wireless power systems

A wireless power, power technology, applied in the field of electronics, can solve problems such as short range

Active Publication Date: 2018-03-27
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantage of this basic form of wireless transmission is the short range

Method used

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  • Systems and methods for reducing parasitic losses in wireless power systems
  • Systems and methods for reducing parasitic losses in wireless power systems
  • Systems and methods for reducing parasitic losses in wireless power systems

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Embodiment Construction

[0019] Embodiments of the invention will be described more fully hereinafter with reference to the accompanying drawings, in which like reference numerals refer to like elements throughout the seven views, and in which example embodiments are shown. Embodiments of the claims may, however, be implemented in many different ways and should not be construed as limited to the embodiments set forth herein. The embodiments set forth herein are non-limiting examples and, among other possible examples, only examples.

[0020] With wireless charging, the receiving part of the system can periodically send to the primary side, for example, the voltage, current and power levels it is operating at and the corrective actions required by the primary side to keep the secondary side power parameters at the desired within the operating range. The performance of such systems can be significantly degraded when parasitic metallic objects are accidentally or intentionally brought close to the trans...

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Abstract

Exemplary embodiments of the system and method for reducing parasitic loss in a wireless power system disclosed herein provide a practical means of accurately estimating parasitic loss in a wireless power transfer system regardless of coupling. Such systems and methods can be used to generate a formula for predicting parasitic losses in wireless power systems. In the offset case where the transmitter and receiver are not directly coupled, losses associated with circulating currents in the primary LC loop account for the majority of said losses, and the transmitted power can be better estimated by: at Measure power input, power output, and injection loss in a controlled environment; mathematically fit a formula that predicts expected transmitter losses from various power measurements and injection losses; and then in an operating environment based on power input, power Output and Expected Loss Equations Use this equation to predict parasitic losses.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 61 / 649,788, filed May 21, 2012, and U.S. Provisional Patent Application Serial No. 61 / 649,799, filed May 21, 2012, both of which Incorporated herein by reference. technical field [0003] The present invention relates generally to electronics, and more particularly to wireless power transfer. Background technique [0004] Wireless energy transfer or wireless power is the transfer of electrical energy from a source to an electrical load without interconnecting wires. Wireless transmission is useful in situations where interconnecting wires are inconvenient, dangerous or impossible. Wireless power differs from wireless communication, where signal-to-noise ratio (SNR), or the percentage of energy received, becomes critical only when the signal is too weak to adequately recover. For wireless power transfer, efficiency is a more important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J50/70H02J7/02
CPCH02J7/0029H02J50/80H02J50/12H02J50/60H02J50/70H01F38/14
Inventor E·G·奥廷格V·A·穆塔托夫R·K·帕提尔K·西达巴图拉W·F·沃特尔斯三世
Owner TEXAS INSTR INC
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