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A parameter design method for electric field coupled wireless power transfer system with constant current output

A technology of wireless power transmission and electric field coupling, applied in electrical digital data processing, computer-aided design, calculation, etc., can solve problems such as unfavorable guiding circuit parameter design, unfavorable engineering realization, unclear resonance relationship, etc., and achieve excellent output current constant. Effects of Features

Active Publication Date: 2022-07-19
NAVAL UNIV OF ENG PLA
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Problems solved by technology

At present, the constant current output method of double-sided LC compensation electric field coupling wireless power transmission is mainly realized by setting the working frequency and the natural resonant frequency of the LC compensation network at the transmitting end or receiving end to meet a specific relationship. The main disadvantage is that the compensation The resonance relationship between the various components and coupling capacitors in the network is not clear, which is not conducive to guiding the design of circuit parameters, and the operating frequency set by the condition of constant current output is very close to the natural resonance frequency of the LC compensation network under certain circumstances , is not conducive to engineering realization

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  • A parameter design method for electric field coupled wireless power transfer system with constant current output
  • A parameter design method for electric field coupled wireless power transfer system with constant current output
  • A parameter design method for electric field coupled wireless power transfer system with constant current output

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[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0031] The terms "first", "second", "third" and the like in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

[0032] figure 1 A schematic diagram of the circuit structure of the electric field coupled wireless power transmission...

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Abstract

The present application discloses a parameter design method for an electric field coupled wireless power transfer system with constant current output. On the basis of analyzing the total input impedance of the electric field coupled wireless power transfer system, the conditions for constant output current and the current during constant current output are deduced. Gain expression, determine the operating frequency and compensation capacitance of the system according to the current gain expression and the area of ​​the coupler as a constraint; calculate the compensation inductance according to the constant output current condition and the determined operating frequency and compensation capacitance; if any of the compensation inductance If one is greater than the preset inductance threshold, modify at least one of the operating frequency and the compensation capacitor until the compensation inductance is not greater than the inductance threshold; simulation experiments are carried out on the system parameters designed based on this method, and it shows that the system output current has nothing to do with the load impedance; This design method solves the problem of unstable output current when the system load impedance changes, and makes the system have excellent constant output current characteristics.

Description

technical field [0001] The present application relates to the technical field of wireless power transmission, and more particularly, to a parameter design method of an electric field coupled wireless power transmission system with constant current output. Background technique [0002] Electric field-coupled wireless energy transmission is a near-field wireless energy transmission method. It has been confirmed by many experts and scholars at home and abroad that it can efficiently transmit electric energy of different power levels and has its unique advantages. [0003] The constant output characteristic is a very important aspect to ensure the quality of power supply, and the current research focus is also devoted to making the wireless power transfer system provide stable output. Some electrical equipment expect a constant current as input, for example, most batteries require a stable current in the early stage of charging. At present, the constant current output method of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/05H02J50/40G06F30/367
CPCH02J50/05H02J50/40G06F30/367
Inventor 熊乔邵英吴旭升孙盼孙军蔡进王蕾
Owner NAVAL UNIV OF ENG PLA
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