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Contactless power supply system and power receiving device

A technology of power supply system and power receiving device, which is applied in circuit devices, electric vehicle charging technology, circuits, etc., can solve the problems of coil coupling coefficient change, positional relationship deviation, and transmission efficiency reduction.

Active Publication Date: 2020-10-30
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to deviation from the desired positional relationship between the power transmitting coil and the power receiving coil, the coupling coefficient between the coils may change and the transmission efficiency may decrease

Method used

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  • Contactless power supply system and power receiving device
  • Contactless power supply system and power receiving device
  • Contactless power supply system and power receiving device

Examples

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no. 1 Embodiment approach

[0076] figure 1 It is a circuit diagram of the contactless power feeding system of 1st Embodiment of this disclosure. The contactless power supply system 100 includes a power transmission device 101 and a power reception device 103 . The power transmitting device 101 includes a power transmitting coil 113 described below, and the power receiving device 103 includes a power receiving coil 121 described below.

[0077] The power transmitting device 101 transmits electric power to the power receiving device 103 in a non-contact manner through magnetic coupling between coils. A method of transmitting electric power using magnetic coupling between coils is, for example, an electromagnetic induction method or a magnetic field resonance method. Application examples of the contactless power supply system 100 include, for example, electric vehicles (vehicles), mobile bodies such as underwater vehicles, charging systems or drive systems for home appliances or medical equipment. The p...

no. 2 Embodiment approach

[0154] In the first embodiment, the case where the element 115 having an imaginary impedance is connected in series to the power transmitting coil 113 and the element 123 having an imaginary impedance is connected in series to the power receiving coil 121 has been described. In the second embodiment, a case where elements having imaginary impedances are respectively connected in parallel to the power transmission coil and the power reception coil will be described.

[0155] The contactless power feeding system 200 of the second embodiment includes a power transmitting device 201 and a power receiving device 203 . The power transmission device 201 includes a power transmission coil 213 to which AC power is input from a power source 211 , an element (series element on the power transmission side) 215 , and an element (parallel element on the power transmission side) 217 ​​. The power receiving device 203 includes a power receiving coil 221 , an element (series element on the pow...

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Abstract

The contactless power supply system of the present disclosure includes a power transmission device including a power transmission coil that inputs AC power of a certain frequency from a power source, a power reception coil that is magnetically coupled to the power transmission coil with a certain coupling coefficient, and a power reception coil that is connected in series to the power reception coil and With imaginary impedance jZ S2i In the power receiving device of the first power receiving side series element, the frequency, coupling coefficient, and imaginary impedance are values ​​satisfying the expression (1).

Description

technical field [0001] The present disclosure relates to a contactless power supply system and a power receiving device. [0002] This application claims priority based on Japanese Patent Application No. 2015-169841 filed in Japan on August 28, 2015, the content of which is incorporated herein. Background technique [0003] In recent years, there has been known a contactless power feeding system that uses electromagnetic induction, magnetic field resonance, or the like to feed power from a power transmitting device including a power transmitting coil to a power receiving device including a power receiving coil. In this system, the magnetic flux generated by the power transmitting coil is linked with the power receiving coil, so that power is transmitted between the coils. Therefore, the efficiency of power transmission (transmission efficiency) is affected by the positional relationship between the power transmitting coil and the power receiving coil. [0004] As a use of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J50/90B60L53/122B60L53/12H01F38/14H02J50/80
CPCH01F38/14H02J50/80Y02T10/7072Y02T90/14H02J50/90H02J50/12B60L53/122B60L53/126Y02T10/70Y02T90/12
Inventor 村山隆彦荒木淳中村寿夫
Owner IHI CORP
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