Forward Parallel Coordinated Control Method for Magnetic Resonance Power Transmission System

A technology of power transmission system and coordinated control, applied in current collectors, electric vehicles, electrical components, etc., can solve problems such as reduced efficiency and reduced coupling strength

Active Publication Date: 2019-07-02
HENAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the reverse coil is introduced on the resonant coil to offset the strong coupling, which can well suppress the frequency splitting, but the coupling strength of this technology at a longer distance is also reduced, which reduces the efficiency of the system during long-distance transmission.

Method used

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  • Forward Parallel Coordinated Control Method for Magnetic Resonance Power Transmission System
  • Forward Parallel Coordinated Control Method for Magnetic Resonance Power Transmission System
  • Forward Parallel Coordinated Control Method for Magnetic Resonance Power Transmission System

Examples

Experimental program
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Embodiment Construction

[0058] The design method of the high-efficiency forward parallel wireless power supply system will be described below with reference to the accompanying drawings.

[0059] figure 1 It is a schematic diagram of the WPT / MRC system structure.

[0060] Such as figure 1 As shown, the WPT / MRC system includes a signal generator, a power amplifier, a transmitting coil (a double forward parallel coil composed of two forward coils), a receiving coil (unidirectional coil), and an adjustable capacitor C 1 and adjustable capacitor C 2 and load.

[0061] figure 2 is the equivalent circuit diagram of the WPT / MRC system.

[0062] Such as figure 2 As shown, the inductances of the two forward coils at the transmitting end are L t 1 and L t 2 , the inductance of the unidirectional coil at the receiving end is L r ;The mutual inductance between the two forward coils is M 12 ; The mutual inductance between the two forward coils and the one-way coil at the receiving end is M 1 (D) an...

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Abstract

The invention discloses a magnetic resonance energy transmission system forward parallel coordinated control method. The problem of low system transmission efficiency caused by the influence of frequency splitting during short-distance energy transmission of a wireless energy transmission system is solved. The transmission efficiency of long-distance energy transmission of the system is kept. A double-layer wound transmitter coil is designed. An internal coil with a certain number of turns is wound in the same direction in the inner space of the original transmitter coil which is unidirectionally wound in a single layer. An external coil and the internal coil are connected end to end to form a double forward parallel structure. The internal coil and the external coil are connected through a switch, so that a double forward parallel resonant coil and a single forward resonant coil can be switched freely. During short-distance energy transmission, the switch is closed, and the double forward parallel coil is used as the transmitter coil to suppress frequency splitting. During long-distance energy transmission, the switch is disconnected, and the single forward coil is used as the transmitter coil to ensure transmission efficiency.

Description

technical field [0001] The invention relates to a forward parallel coordinated control method of a magnetic resonance electric energy transmission system. Background technique [0002] Magnetically coupled resonant wireless power transfer (wireless power transfer via magneticresonant coupling, WPT / MRC) technology uses two or more electromagnetic systems with the same resonant frequency. When they are in a resonant state, there is a strong energy exchange between them. A technology that achieves high-efficiency energy transfer through non-radiative near-field. [0003] According to the size of the coupling strength and the working mode of the system, the working area of ​​the wireless power transfer system can be divided into three types: strong coupling, critical coupling, and weak coupling area. [0004] The study found that when the wireless power transmission system is in the strong coupling region, the transmission efficiency of the system reaches the maximum value on b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J7/00
CPCH02J7/025H02J50/12
Inventor 施艳艳王萌梁洁高伟康
Owner HENAN NORMAL UNIV
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