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Device for the inductive transfer of electric energy

An inductive technology for transmitting electric energy, applied in the direction of electric devices, charging stations, collectors, etc., can solve the problem of primary current increase

Inactive Publication Date: 2012-05-23
CONDUCTIX WAMPFLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this document, the use of metal detectors is dismissed as useless, although the problem of the presence of metal impurities is also mentioned, but by circuit-technical measures such that the system is close to the The oscillation circuit composed of the compensation capacitor connected in parallel is in resonance, and the primary current increases sharply, wherein the primary current is basically concentrated on one or several primary coils next to the secondary coil

Method used

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  • Device for the inductive transfer of electric energy
  • Device for the inductive transfer of electric energy
  • Device for the inductive transfer of electric energy

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] figure 1 An electric vehicle 1 is shown schematically in sectional view (top) and plan view (bottom), which is positioned above a primary coil 2 of a charging station for charging its battery. A secondary coil 4 connected to an electronic charging device 5 is located in a housing 3 on the underside of the vehicle 1 . This electronic charging device converts the parameters of the electric power which is inductively transmitted into the secondary coil 4 into values ​​suitable for charging the battery of the vehicle 1 . The primary coil 2 is powered by a power supply unit 6 of the charging station and is accommodated in a housing 8 which is fixedly mounted on the parking space. The power supply unit 6 is controlled by a control unit 7 of the charging station.

[0014] exist figure 1 Several force lines 9 of the alternating magnetic field generated by the primary coil 2 during operation are shown in dotted lines. The main direction of this alternating magnetic field cor...

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Abstract

The invention relates to a device for the inductive transfer of electric energy from a stationary unit comprising at least one primary inductance (2) to a vehicle (1) that is adjacent to said unit and has at least one secondary inductance (4). The stationary unit has a device (12, 13, 14; 2, 16, 14) for detecting the presence of an electrically conductive object (11,1) in a predetermined area that borders the primary inductance (2). In particular, said area can be the area (10) lying between the primary inductance (2) and the secondary inductance (4) during the inductive energy transfer. The device has at least one measuring inductance, a measuring unit (13, 16) for measuring the impedance of the measuring inductance (12, 2) and an evaluation unit (14) that is connected to the measuring unit (13, 16). The measuring inductance can be identical to the primary inductance (2).; Preferably, the device is equipped with a plurality of measuring inductances (12) which form a regular two-dimensional arrangement extending approximately on one plane, said plane lying perpendicular to the main direction of the magnetic field (9) that is generated by the primary inductance during operation.

Description

technical field [0001] The invention relates to a device for the inductive transmission of electrical energy according to the preamble of claim 1 . Such devices are used to inductively charge rechargeable batteries installed in electric vehicles. During the energy transmission, a magnetic field with high field strength and flux density is formed between the stationary primary coil and the vehicle-side secondary coil. This is necessary in order to induce a sufficiently high current in the secondary coil for the desired transmitted power. Background technique [0002] If an object made of metallic material is placed within the range of such a field, eddy currents / eddy currents are induced in the object, which cause heating depending on the material, the duration of exposure and the magnitude of the field strength. If corresponding conditions exist, such objects can reach temperatures which can lead to damage, for example melting of plastic surfaces, or danger to persons. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02B60L11/18
CPCB60L3/00H02J7/025Y02T90/12Y02T90/125B60L11/182Y02T90/14B60L11/1831Y02T10/7088Y02T90/122Y02T10/7005Y02T10/7072B60L53/12B60L53/39B60L53/124H02J50/10H02J50/60Y02T10/70H02J50/80B60L3/0069B60Y2200/91
Inventor M·韦希林A·格林
Owner CONDUCTIX WAMPFLER
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