Method for obtaining wireless power transfer system using harmonic current
A technology of wireless energy transmission and harmonic current, applied in the direction of circuit devices, electrical components, etc., can solve problems such as size limitations of resonant circuit components, and achieve the effects of improving frequency limitations, reducing volume, and reducing size
Active Publication Date: 2021-12-03
深圳市华禹无线供电技术有限公司
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Problems solved by technology
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 present invention provides a method for obtaining a wireless power transmission system using harmonic currents, comprising the following steps: S1. circuit topology design, using an LLC series resonant converter (LLC- SRC); S2. Carry out mutual inductance parameter design, select the magnetic core size and shape to determine the mutual inductance coefficient; S3. Carry out quality factor Q design, use electromagnetic field analysis software to establish a finite element analysis model, use the reference phasor to represent the current, according to the circuit structure diagram Calculate the calculation formula for the quality factor Q; S4. Perform the secondary winding side turns N 2 Design; S5. Perform primary winding side turns N 1 Design; S6. When calculating the number of turns on the primary winding side N 1 and the number of turns on the secondary winding side N 2 Afterwards, based on the judgment of the quality factor Q, an approximate optimization design is carried out, and the N 2 and N 1 The number of turns to find the sweet spot; S7. Check that the transformer is large enough to accommodate all windings, if not, change to a larger core structure and repeat the steps from 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...
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IPC IPC(8): H02J50/12
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