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Toroidal Coil Electromagnetic Radiation Prediction Method Based on Resonant Wireless Power Transfer

A wireless power transmission and electromagnetic radiation technology, applied in the directions of antenna radiation patterns, electrical components, circuit devices, etc., can solve the problem of inability to suppress radiation interference, inability to know the influencing factors and distribution of radiation interference, inability to know the changes in electromagnetic radiation and Trends and other issues to achieve the direct and effective effect of inhibition

Active Publication Date: 2020-01-10
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The electromagnetic radiation shielding device and electromagnetic radiation safety warning system mentioned in the above patents are currently one of the few electromagnetic radiation problems for wireless power transmission systems. Radiation suppression and early warning, the influence factors and distribution of the radiation interference cannot be known during the system design process, so that the radiation interference cannot be suppressed from the root, and the electromagnetic radiation change and trend cannot be known when the parameters change

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  • Toroidal Coil Electromagnetic Radiation Prediction Method Based on Resonant Wireless Power Transfer
  • Toroidal Coil Electromagnetic Radiation Prediction Method Based on Resonant Wireless Power Transfer
  • Toroidal Coil Electromagnetic Radiation Prediction Method Based on Resonant Wireless Power Transfer

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Embodiment Construction

[0046] Further details will be described below in conjunction with the accompanying drawings.

[0047] see figure 2 , the prediction method of the present invention includes: firstly determine the parameters of the wireless power transmission system, then determine the coil parameters, and draw the electromagnetic radiation model; select the resonant topology circuit, thereby draw the coupling circuit; calculate the inductance value according to the electrostatic field, and calculate the inductance impedance according to the eddy current field , which simulates electromagnetic radiation from transient fields. Modify the different parameters of the coil, repeat the process of calculating the inductance value based on the electrostatic field, calculating the inductance impedance based on the eddy current field, and simulating the electromagnetic radiation based on the transient field; finally, by comparing and analyzing the simulation results under different coil parameters, a ...

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Abstract

The invention relates to an electromagnetic radiation prediction method for an annular coil based on resonant wireless power transmission, which is characterized in that various states of a transmission coil of the system are simulated, distribution conditions of a magnetic field around the coil are extracted, and an electromagnetic radiation prediction value of the system is obtained. System parameters are adjusted subsequently based on the prediction value, and suppression measures are adopted for radiation interference in a targeted manner until an expected target is conformed. The prediction method can enable electromagnetic radiation to be optimized at an interference source, so that the electromagnetic radiation distribution and the variation trend of the system can be clearly understood in an early stage of design, thereby guiding the direction for subsequent radiation interference suppression, saving a lot financial resources, energy and material resources, and being an important method for solving an electromagnetic radiation problem of wireless power transmission.

Description

technical field [0001] The invention belongs to the field of power electronics electromagnetic interference research, in particular to a ring coil electromagnetic radiation prediction method based on resonant wireless power transmission. Background technique [0002] Wireless power transmission technology is becoming more and more mature, and has broad application prospects and demands in battery charging of implanted medical devices in the body, charging of electric vehicles, power supply of submarine detection equipment, and charging of consumer electronic devices. This technology may cause a revolution in the energy field, but the system works by using medium and high frequency electromagnetic field coupling to realize power transmission. The leaked electromagnetic field will affect the operation of surrounding electronic equipment and may damage human health and safety. The problem of electromagnetic radiation It is also more and more important in engineering practice. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/70G01R29/10
CPCG01R29/10H02J50/70
Inventor 祁鹤媛陈文洁肖天鸾赵子峰沙意林
Owner XI AN JIAOTONG UNIV
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