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Wireless power transfer system

A technology of power transmission system and coil, which is applied in the direction of control/regulation system, electrical components, circuit devices, etc., and can solve the problem of low coupling coefficient value

Active Publication Date: 2019-09-13
IMPERIAL INNOVATIONS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This coupling coefficient value is relatively low when compared to inductive links that use ferrite in their coils

Method used

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Examples

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Embodiment Construction

[0076] Figure 1a and Figure 1b Inductive link circuit configurations are shown, each having a simple transmitter circuit 120 and a simple receiver circuit 130 . Each of the transmitting circuit and the receiving circuit has a coil, and the magnetic coupling of the coils of the transmitter circuit and the receiver circuit can be represented by k. Current source 102 will current I ac Introduce the transmitter circuit. The transmitting coil 104 has an inductance L tx .

[0077] The receiving side circuit consists of an inductance L rx The receiver coil 106. exist Figure 1a , with capacitance C rx The capacitor 108a with a resistor R ac,par The load resistor 110a is arranged in parallel. exist Figure 1b , with capacitance C rx capacitor 108b with a resistor R ac,ser The load resistor 110b is arranged in series.

[0078] run through Figure 2a to Figure 2d , the same reference numerals represent the same components. Figure 2a to Figure 2d Hybrid and conventional ...

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PUM

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Abstract

Disclosed herein is a rectifier circuit for receiving an AC signal from a receiver coil in an inductive power transfer system. The circuit is configured to operate at an operating frequency. The circuit comprises a Class-E rectifier; an AC signal supplier configured to supply an AC signal to the rectifier circuit; and a resonant network having an inductor and a capacitor. The resonant network hasa resonant frequency, and the ratio of the resonant frequency to the operating frequency is within the range of 1.75 to 3.

Description

technical field [0001] The present disclosure relates to inductive power transfer, and more particularly to class E rectifiers for use in inductive power transfer circuits. Background technique [0002] Wireless power transfer has many industrial applications, and devices using wireless power transfer, such as wireless toothbrush chargers, wireless charging pads for mobile devices, and wirelessly charging medical devices implanted in the body, continue to grow in popularity. [0003] Inductive Power Transfer (IPT) is an example of Wireless Power Transfer (WPT). In the example of an inductive power transfer system, an alternating current is passed through a transmitter coil. This causes the transmitter coil to generate a time-varying magnetic field. When a receiver coil is placed in a time-varying magnetic field, the magnetic field induces an AC current in the receiver coil, which can then be used to drive a load. Thus, electrical energy is wirelessly transferred from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02J50/12
CPCH02M3/335H02M3/33592H02J50/12H02M1/0058Y02B70/10H02M1/083H02M7/06H02M7/537H02M7/4815
Inventor 大卫·耶茨乔治·凯利斯保罗·米切森萨梅尔·阿尔达希尔
Owner IMPERIAL INNOVATIONS LTD