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Metal foreign body-identification system for inductive energy transmission systems

An identification system and energy transmission technology, applied in the field of identification systems, can solve problems such as aging, foreign objects that cannot be reliably identified, and component wear and tear

Inactive Publication Date: 2015-07-15
PAUL VAHLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the charging process must always be interrupted in order to detect foreign objects, which leads to faster wear and aging of the battery to be charged and the components used
It is also disadvantageous that, due to the size of the primary and secondary windings, foreign objects that are small relative to them cannot be detected reliably

Method used

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  • Metal foreign body-identification system for inductive energy transmission systems
  • Metal foreign body-identification system for inductive energy transmission systems
  • Metal foreign body-identification system for inductive energy transmission systems

Examples

Experimental program
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Embodiment Construction

[0031] figure 1 A block diagram of an identification system according to the invention is shown. The identification system has a primary resonant circuit, which is formed by the capacitance C of the coil on the primary side A and inductance L A A series circuit is formed. Primary side resonant circuit C A -L A Excited to oscillate by an excitation signal, which itself is generated by source 1 . The parallel resonant circuit on the secondary side passes through the capacitance C of the coil on the secondary side B and inductance L B form. The voltage induced in the resonant circuit on the secondary side is measured by means of the measuring device 2 . Point A 1、A 2 , B 1 and B 2 is the inductance L of the identification system A , L B Or the connection point of the coil.

[0032] figure 2 Coil L showing the identification system A and L B The first possible composition scheme of . Coil L A and L B The individual conductor sections have straight conductor s...

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Abstract

The invention relates to an identification system for identifying electrically conductive foreign bodies (F) in the region (3) between the primary and secondary winding of an inductive energy transmission system, the identification system likewise having at least one primary coil (LA) and at least one secondary coil (LB) which are intercoupled. At least one primary coil (LA) and / or at least one secondary coil (LB) of the identification system is a constituent part or are constituent parts of at least one electrical resonant circuit (LA-CA; LB-CB) and an electrical source (7) excites at least one resonant circuit (LA-CA). A monitoring device monitors at least one electrical variable on the secondary and / or primary side of the identification system and identifies the foreign body using said measured electrical variable.

Description

technical field [0001] The invention relates to a detection system for detecting conductive foreign bodies in the region between a primary winding and a secondary winding of an inductive energy transmission system. Background technique [0002] Contactless energy transfer uses high-frequency magnetic fields. If an electrically conductive foreign object enters the region of this magnetic field, eddy currents are generated in the magnetic field, which lead to heating of the foreign object. Alternating magnetization losses additionally result in ferromagnetic materials which likewise contribute to foreign body heating. In addition, losses due to eddy currents occur during energy transmission. [0003] Foreign objects can be ignited by heating. If the foreign body is a living thing, the living thing is at great risk due to possible heating. [0004] Conductive foreign bodies are therefore a disturbing factor, for example, when charging a contactless battery of an electric ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/10B60L11/18H02J5/00H02J7/02
CPCY02T10/7094B60L3/00B60L11/182H02J17/00G01V3/105Y02T90/14Y02T90/122Y02T10/7005G01V3/101Y02T10/7072B60L53/124H02J50/12H02J50/60Y02T10/70Y02T90/12
Inventor 费卡尔·图尔基
Owner PAUL VAHLE
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