Title:
METHOD FOR DETECTING AN ELECTRICALLY CONDUCTIVE FOREIGN BODY AND DEVICE FOR INDUCTIVELY TRANSMITTING ELECTRICAL ENERGY
Document Type and Number:
WIPO Patent Application WO/2012/160136
Kind Code:
A3
Abstract:
In a method for detecting an electrically conductive foreign body at a device for inductively transmitting electrical energy from a stationary unit having an electrical power supply unit and a primary inductor to a mobile unit having a secondary inductor and an electric load, electrical power is initially fed from the electrical power supply unit into the primary inductor and said feed-in is interrupted. The curve over time of the decay, caused thereby, of an electrical operating variable of the primary inductor is measured and at least one parameter of the measured curve is compared with a corresponding parameter of a reference curve that would be determined in the event of an interruption of the power feed-in into the primary inductor without the presence of an electrically conductive foreign body in the region of the magnetic field produced by the primary inductor. On the basis of said comparison, it is determined whether an electrically conductive foreign body is present in the region of the magnetic field produced by the primary inductor.
Inventors:
WECHLIN MATHIAS (DE)
ASSELIN PASCAL (FR)
ASSELIN PASCAL (FR)
Application Number:
PCT/EP2012/059703
Publication Date:
July 18, 2013
Filing Date:
May 24, 2012
Export Citation:
Assignee:
CONDUCTIX WAMPFLER GMBH (DE)
WECHLIN MATHIAS (DE)
ASSELIN PASCAL (FR)
WECHLIN MATHIAS (DE)
ASSELIN PASCAL (FR)
International Classes:
B60L11/18; B60L5/00; H02J5/00; H02J7/02; H02J17/00
Domestic Patent References:
| WO2005109598A1 | 2005-11-17 | |||
| WO2005109597A1 | 2005-11-17 |
Foreign References:
| DE202009009693U1 | 2010-11-25 | |||
| KR100992480B1 | 2010-11-05 |
Attorney, Agent or Firm:
WOHLFARTH, Ulrich (Fuggerstrasse 20, Augsburg, DE)
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