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Two-way wireless-energy stable transmission system circuit topology applicable to wide-coupling coefficient variation range and control strategy

A two-way radio and coupling coefficient technology, applied in the direction of circuit devices, electrical components, etc., can solve the problems of small effective range and poor anti-displacement ability of the wireless power transmission system, and achieve the improvement of design ideas and control methods, stable wireless power transmission, Achieve the effect of wireless power transmission

Active Publication Date: 2018-01-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to improve the problems of small effective range and poor anti-displacement ability of the wireless power transmission system

Method used

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  • Two-way wireless-energy stable transmission system circuit topology applicable to wide-coupling coefficient variation range and control strategy
  • Two-way wireless-energy stable transmission system circuit topology applicable to wide-coupling coefficient variation range and control strategy
  • Two-way wireless-energy stable transmission system circuit topology applicable to wide-coupling coefficient variation range and control strategy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A two-way wireless power stable transmission system circuit suitable for wide coupling coefficient variation range, such as figure 2As shown, the power transmission system circuit includes two multi-resonance structures 1, a variable frequency power supply 2, a state detection and frequency controller 3, a frequency conversion control strategy module 4, a coupling mechanism 5 and an alarm device; one of the multi-resonance structures 1 is provided in The primary winding end of the coupling mechanism 5, and the two power supply ends of the multi-resonance structure 1 are connected to the two power supply ends of the variable frequency power supply 2; the other multi-resonance structure 1 is arranged on the secondary winding of the coupling mechanism 5. The frequency control signal output end of the state detection and frequency controller 3 is connected with the frequency control signal input end of the variable frequency power supply 2; the coupling state detection end ...

Embodiment 2

[0043] Embodiment 2 is a further limitation to the circuit of the two-way wireless power stable transmission system described in Embodiment 1 that is suitable for a wide variation range of coupling coefficients. The multi-resonance structure 1 in the power transmission system circuit adopts a bilateral LCC compensation network structure. specific:

[0044] A power transmission system circuit based on a bilateral LCC compensation network structure includes a variable frequency power supply U P , two resonant inductance elements L 1 , two resonant capacitive elements C 1 , two resonant capacitive elements C 2 , the primary winding L of the coupling mechanism 2 , the secondary winding L of the coupling mechanism 2 , resistance r 2 and load R L , state detection and frequency controller 3 and variable frequency variable frequency control strategy module 4; the primary winding L of the coupling mechanism 2 A resonant capacitive element C is connected in series at both ends o...

Embodiment 3

[0057] Embodiment 3 is a further limitation of the circuit of the two-way wireless power stable transmission system described in Embodiment 1 that is suitable for a wide coupling coefficient variation range. The frequency conversion control strategy 4 in the power transmission system circuit can be implemented by the following methods. The first strategy is to generate a swept frequency signal through the signal source. The first strategy is the frequency sweep judgment under the condition of unknown parameters. Figure 4 As shown, for a multi-resonance system, after placing the charging device, the frequency corresponding to the maximum output power in this state is determined by detecting the output power at different resonance frequencies, and this frequency can be used for wireless power transmission at this time. The second strategy is based on Figure 5 What is shown is the measurement judgment under the premise of calibrating the range of the coupling coefficient. For ...

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Abstract

The invention discloses a two-way wireless-energy stable transmission system circuit topology applicable to the wide-coupling coefficient variation range and a control strategy and belongs to the technical field of wireless energy transmission. An energy transmission system comprises two multi-resonant structures, a variable-frequency power supply, a state detection and frequency controller, a variable-frequency control strategy module, a coupling mechanism and an alarm device. The variable-frequency control strategy on the basis of a multi-resonant compensation network is applicable to a wireless charging system and can enable the wireless energy transmission system to be suitable for greater displacement deviation.

Description

technical field [0001] The invention relates to a frequency conversion control strategy for stable transmission power applied to a wireless charging system, and belongs to the technical field of wireless power transmission. Background technique [0002] The current wireless power transmission technology, such as wireless charging of mobile phones, robots, and electric vehicles, faces a serious problem. As the spatial position of the coupling mechanism deviates from the optimal alignment position, the coupling coefficient of the power transmission system changes, which A change greatly reduces the transmission power of the system and affects the normal charging of the device. Therefore, the prior art has higher requirements for coil alignment. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to improve the problems of small effective range and poor anti-displacement capability of the wireless power transmission system. This technology provides a v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12
Inventor 魏国杨超朱春波汪超逯仁贵宋凯
Owner HARBIN INST OF TECH
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