Method for determining receiving coil position of omnidirectional wireless electric energy transmission system

Abstract

The invention relates to a method for determining the receiving coil position of an omnidirectional wireless electric energy transmission system. The method comprises the following steps that: utilizing a Kirchnoff voltage law to construct a coupling circuit equation of the transmitting coil and the receiving coil of the omnidirectional wireless electric energy transmission system; according to the coupling circuit equation, determining the equation of load power and total input power of the omnidirectional wireless electric energy transmission system, wherein the equations are superposition magnetic field vector angle equations about the transmitting coil; changing the superposition magnetic field vector angles, measuring total input power corresponding to any two different superpositionmagnetic field vector angles through a measurement tool to obtain the equation of two pieces of total input power; and according to the equation of the two pieces of total input power, solving the superposition magnetic field vector angle when the total input power is a maximum value. Since energy transfer efficiency is simultaneously maximum when the total input power is maximum, when the energytransfer efficiency is maximum, the superposition magnetic field vector angle and the angle of a position where the receiving coil is positioned are the same, and the position of the receiving coil isdetermined.

Description

technical field [0001] The invention relates to the field of omnidirectional wireless power transmission, in particular to a method for determining the position of a receiving coil in an omnidirectional wireless power transmission system. Background technique [0002] With the maturity of power electronics technology, high-quality high-frequency power supplies and coil resonators can be provided, and WPT technology has obtained the required technical support, which has attracted widespread attention. At present, directional WPT technology has gradually matured and has been applied to wireless charging of portable devices such as medical implants, power transmission systems, and mobile phones. With the development of science, some papers have proposed the idea of ​​using orthogonal coils for omni-directional WPT. At the same time, some papers have proposed a method to determine the orientation of the receiving coil through omni-directional scanning. However, the process of th...

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Problems solved by technology

With the development of science, some papers have proposed the idea of ​​using orthogonal coils for omni-directional WPT. At the same time, some papers have proposed a method to determine the orientation of the receiving coil through omni-directional scanning. However, the process of this method is complicated and the determination of the receiving coil Azimuth takes a long time

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