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A wireless power supply device for electric vehicles

A wireless power supply, electric vehicle technology, applied in the direction of circuit devices, electrical components, etc., can solve the problems of reduced transmission power and transmission efficiency, reduced use value, etc., achieve good results, enhance magnetic coupling, improve transmission distance and transmission efficiency Effect

Inactive Publication Date: 2021-08-17
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Beyond the critical coupling distance, its transmission power and transmission efficiency decrease rapidly with the transmission distance, which greatly reduces its use value

Method used

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  • A wireless power supply device for electric vehicles
  • A wireless power supply device for electric vehicles
  • A wireless power supply device for electric vehicles

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Experimental program
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Embodiment Construction

[0033] A design method of a wireless power supply device for an electric vehicle according to the present invention will be described in detail below with reference to the drawings and embodiments.

[0034] like figure 1 As shown, the wireless power supply device for electric vehicles of the present invention is provided with an AC voltage source, a transmitting coil compensation capacitor, an external load, a transmitting coil, a receiving coil, a transmitting coil core and a receiving coil core. The transmitting coil is connected to the front-stage AC voltage source for transmitting the alternating electromagnetic field of the power supply, and the resonant frequency of the transmitting coil is matched with the center frequency of the power supply through the transmitting coil compensation capacitor to ensure a low reflection coefficient; the receiving coil and The external load constitutes the receiving circuit of the device, and the receiving coil receives the alternating ...

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Abstract

The invention relates to a wireless power supply device for electric vehicles, which adopts magnetic coupling resonance type and magnetic induction type wireless power transmission and reception mode, including a transmitting coil, a receiving coil, a transmitting coil magnetic core and a receiving coil magnetic core, and the transmitting coil magnetic core is composed of The thin shaft of the magnetic core and the circular platforms at both ends of the magnetic core are composed; the transmitting coil is wound close to the thin shaft of the magnetic core; the height of the transmitting coil is equal to the length of the thin shaft of the magnetic core l core equal; the height h of the round platform at both ends of the magnetic core is 1 / 6 of the length l of the transmitting coil magnetic core; the upper bottom surface of the round platform at both ends of the magnetic core is close to the thin axis of the magnetic core and the cross-sectional radius of the thin axis of the magnetic core is r core , the radius r of the two upper bottom surfaces and the radius r of the transmitting coil 1 Equal; the radius R of the bottom surface of the circular platform at both ends of the magnetic core and the radius r of the receiving coil 2 The same; the height of the receiving coil is the same as the length L of the receiving coil core. The wireless energy transmission effect of the invention is better, and the transmission distance and transmission efficiency are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and relates to a wireless power supply device for electric vehicles. Background technique [0002] Traditional direct contact power transmission has disadvantages such as contact sparks, affecting the safety and reliability of power supply, and even causing fire or explosion, causing major accidents and so on. Therefore, finding a more flexible and convenient power transmission method has become a beautiful pursuit of human beings. As early as the end of the 19th century, Nicola Tesla conducted experimental research on long-distance wireless power transmission, but failed to realize it due to technical and financial constraints. Most of the more mature energy non-contact transmission technologies at home and abroad use the principle of electromagnetic induction, but the energy transmission efficiency of this method decays rapidly with the increase of distance, so it is only s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/10H02J50/12
CPCH02J50/10H02J50/12
Inventor 王萌冯静施艳艳杨岚范悦
Owner HENAN NORMAL UNIV
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