Magnetically-coupled resonant wireless power transmission system parameter design method based on SS topology

A technology of wireless energy transmission and magnetic coupling resonance, applied in the direction of collectors, electric vehicles, electrical components, etc., can solve the problem that there is no battery parameter design method, and achieve the effect of meeting the charging characteristics and safety requirements

Active Publication Date: 2016-08-31
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the current parameter design method is only for a fixed load resistance or selection of resonant network parameters based on experience, and there is no discussion on the parameter design method that combines the above charging characteristics of the battery.

Method used

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  • Magnetically-coupled resonant wireless power transmission system parameter design method based on SS topology
  • Magnetically-coupled resonant wireless power transmission system parameter design method based on SS topology
  • Magnetically-coupled resonant wireless power transmission system parameter design method based on SS topology

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Embodiment 1

[0041] see figure 1 , taking the 250W low-power charging platform as an example, the front-stage 80V ideal voltage source passes through the inverter, and the DC is inverted to generate a high-frequency AC square wave voltage to drive the resonant network on the transmitting side. The resonant network on the transmitting side generates a high-frequency electromagnetic field, and the resonant network on the receiving side The network induces a high-frequency electromagnetic field to generate a high-frequency AC voltage, which is finally charged to the battery after being rectified by a rectifier.

[0042] 2(a) is the ideal battery charging curve. The battery is charged with a constant current in section A-B, the charging current remains unchanged, and the charging voltage gradually increases with time. When charging at a constant voltage in section B-C, the charging voltage remains unchanged, and the charging current increases with time. The time gradually decreases, and the eq...

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Abstract

The invention discloses a magnetically-coupled resonant wireless power transmission system parameter design method based on SS topology. In order to solve the problem of over large traditional two-stage charging peak power, when constant current charging of a battery is switched into constant voltage charging, a constant power charging stage is introduced; and meanwhile, in order to ensure safety operation of the system and high efficiency of transmission, input current of a primary resonant network and a phase-shift angle of an inverter are limited, an inductance parameter relationship between two coupled coils is limited respectively by using the three charging stages and the safety operation range, the inductance value range of the two coupled coils is thus determined, a reliable design criterion is provided for the resonant network parameter design, and safety and high efficiency during the battery charging process are ensured. The method of the invention meets requirements of the magnetically-coupled resonant wireless power transmission system for battery full-range charging.

Description

technical field [0001] The invention relates to a parameter design method of a magnetic coupling resonance wireless power transmission system, in particular to a parameter design method of a magnetic coupling resonance wireless power transmission system based on SS topology. Background technique [0002] According to its realization principle, wireless power transmission technology can be divided into two categories: near field and far field. Near-field technology is easy to achieve higher efficiency and greater power, so it is widely used in wireless charging of electric vehicles, smart devices, robots, drones, implanted medical equipment, etc., and the magnetic field in near-field technology Coupled resonant technology can better meet performance requirements. When charging commonly used batteries, wireless chargers have the following requirements for their charging characteristics: [0003] 1) Constant charging current. The first stage of the battery charging process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J50/12
CPCH02J7/025
Inventor 王跃蒋勇斌刘铭刘军文宁改娣
Owner XI AN JIAOTONG UNIV
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