Method for acquiring radio energy transmission system applying harmonic current
A technology of wireless power transmission and harmonic current, applied in the direction of electrical components, circuit devices, etc., can solve the problem of size limitation of resonant circuit components, and achieve the effect of improving frequency limitation, reducing volume, and reducing size
Active Publication Date: 2019-04-09
深圳市华禹无线供电技术有限公司
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Using a modified topology will have some advantages, but the size of the resonant tank components will still be limited by the system frequency
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[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0050] Such as Figure 1-Figure 16 , an embodiment of the present invention provides a method for obtaining a wireless power transfer system using harmonic currents, including S1. Circuit topology design: using an LLC series resonant converter (LLC-SRC) on the basis of a phase shift-full bridge topology , the resonant capacitor in the LLC-SRC can be used as a compensation capacitor to offset the leakage inductance at the resonant frequency; S2. Carry out mutua...
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The invention provides a method for acquiring a radio energy transmission system applying harmonic current, comprising the following steps: S1, designing a circuit topology, and using an LLC series resonant converter (LLC-SRC) based on the phase shift-full bridge topology circuit; S2, designing a mutual inductance parameter, and selecting the core size and shape to determine a mutual inductance coefficient; S3, designing a quality factor Q, establishing a finite element analysis model by using the electromagnetic field analysis software, representing the current by the reference phasor, and calculating according to the circuit structure diagram to obtain the calculation formula of the quality factor Q; S4, designing a secondary winding side number of turns N2; S5, designing a primary winding side number of turns N1; S6, designing approximate optimization based on the judgment of the quality factor Q after calculating the primary winding side number of turns N1 and the secondary windingside number of turns N2, and adjusting the number of turns of N2 and N1 to find the optimum point; and S7, checking whether the transformer is large enough to accommodate all windings, if not, changing to a larger core structure, and repeating the steps starting with the S2.
Description
technical field [0001] The present invention relates to the technical field of wireless power transmission, in particular to a method for obtaining a wireless power transmission system using harmonic current. Background technique [0002] In recent years, research on wireless power transfer system technology has attracted more and more attention from researchers. Inductive power transfer technology (IPT) has matured and been successfully used in several electric vehicle systems. [0003] When electric vehicles use IPT technology, the primary winding needs to be buried under the road surface. However, it takes a lot of time to install the ferromagnetic core on the existing road, and the requirements for the magnetic core structure are very high. In terms of topology, a general wireless power transfer system uses a Phase Shift-Full Bridge (PSFB) topology. However, this topology is easily affected by filters. At the same time, there is a large leakage inductance in the wirel...
Claims
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CPCH02J50/12
Inventor 周洪吴雨李刚李佳邓其军胡文山周东国
Owner 深圳市华禹无线供电技术有限公司