CHECKING A PRESENCE OF AN ELECTRICALLY CONDUCTIVE BODY
First Claim
1. An apparatus for checking a presence of an electrically conductive body in a near field of charging coils of an arrangement for induced charging, the apparatus comprising:
- at least one transmitting device for providing a transmission signal in the form of a magnetic field, andat least one receiving device for generating a first reception signal from the transmission signal provided by the transmitting device and induced into the receiving device,wherein the transmitting device and the receiving device are formed in such a way that, when the electrically conductive body is present, a first reception signal forms and, when the electrically conductive body is absent, a second reception signal, different than the first reception signal, forms in the receiving device on account of the induced transmission signal, andwherein the transmitting device and the receiving device are formed in a manner dependent on the magnetic power field of the charging coils in such a way that, when the electrically conductive body is absent, the second reception signal comprises partial reception signals formed in the receiving device on account of the induced transmission signal, the partial reception signals substantially cancelling one another out in the second reception signal.
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Accused Products
Abstract
An apparatus checks for a presence of an electrically conductive body in the near field of charging coils of an arrangement for induced charging. At least one transmitting device provides a transmission signal in the form of a magnetic field. At least one receiving device generates a reception signal from the transmission signal and induced into the receiving device. The transmitting device and the receiving device are formed in such a way that, when the electrically conductive body is present, a first reception signal forms and, when the electrically conductive body is absent, a second reception signal, different than the first, forms in the receiving device on account of the induced transmission signal. The transmitting device and the receiving device are formed in a manner dependent on the magnetic field of the charging coils in such a way that, when the electrically conductive body is absent, partial reception signals form in the receiving device on account of the induced transmission signal, where partial reception signals substantially cancel one another out in the reception signal.
10 Citations
20 Claims
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1. An apparatus for checking a presence of an electrically conductive body in a near field of charging coils of an arrangement for induced charging, the apparatus comprising:
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at least one transmitting device for providing a transmission signal in the form of a magnetic field, and at least one receiving device for generating a first reception signal from the transmission signal provided by the transmitting device and induced into the receiving device, wherein the transmitting device and the receiving device are formed in such a way that, when the electrically conductive body is present, a first reception signal forms and, when the electrically conductive body is absent, a second reception signal, different than the first reception signal, forms in the receiving device on account of the induced transmission signal, and wherein the transmitting device and the receiving device are formed in a manner dependent on the magnetic power field of the charging coils in such a way that, when the electrically conductive body is absent, the second reception signal comprises partial reception signals formed in the receiving device on account of the induced transmission signal, the partial reception signals substantially cancelling one another out in the second reception signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A charging arrangement for inductively charging an electric vehicle, the charging arrangement comprising:
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charging coils a conductor presence detector comprising; at least one transmitting device for providing a transmission signal in the form of a magnetic field, and at least one receiving device for generating a first reception signal from the transmission signal provided by the transmitting device and induced into the receiving device, wherein the transmitting device and the receiving device are formed in such a way that, when the electrically conductive body is present, a first reception signal forms and, when the electrically conductive body is absent, a second reception signal, different than the first reception signal, forms in the receiving device on account of the induced transmission signal, and wherein the transmitting device and the receiving device are formed in a manner dependent on the magnetic power field of the charging coils in such a way that, when the electrically conductive body is absent, the second reception signal comprises partial reception signals formed in the receiving device on account of the induced transmission signal, the partial reception signals substantially cancelling one another out in the second reception signal. - View Dependent Claims (19, 20)
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Specification