Device and Method for the Detection of an Interfering Body in a System for the Inductive Transfer of Energy and a System for the Inductive Transfer of Energy
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Accused Products
Abstract
The invention relates to a method and an apparatus for detecting at least one interfering body in a system for inductive energy transmission, wherein the system includes at least one primary coil unit, wherein the apparatus includes at least one interfering body detector means, wherein the at least one interfering body detector means includes at least one field coil means and at least one detector coil means which is assigned to the at least one field coil means, wherein the apparatus includes at least one evaluation means, wherein the interfering body is detectable depending on the state of coupling and/or the change in the state of coupling, wherein the apparatus includes at least one compensation means.
21 Citations
35 Claims
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1-16. -16. (canceled)
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17. A device for the detection of at least one interfering body in a system for the inductive transfer of energy, wherein the system for the inductive transfer of energy comprises at least one primary coil unit for generating at least a part of an electromagnetic power transfer field, the device comprising:
- at least one means for the detection of interfering bodies, wherein the at least one means for the detection of interfering bodies comprises at least one exciter coil means for generating an exciter field and at least one detector coil means which is associated with the at least one exciter coil means;
at least one evaluation means for detecting a coupling state between the at least one exciter coil means and the at least one detector coil means and/or for detecting a change of the coupling state, wherein the interfering body is detectable as a function of the coupling state and/or of the change of the coupling state;
at least one compensation means for compensating an electromagnetic influence of the primary coil unit and/or of a secondary coil unit on the coupling state between the at least one exciter coil means and the at least one detector coil means, wherein the at least one means for the detection of interfering bodies is constructed separately from the primary coil unit,wherein the proportion of the power transfer field in the field received by the at least one detector coil means is reducable by the compensation means and/or the proportion of the output signal which is generated by the at least one detector coil means as a function of the received power transfer field is reducable by the compensation means, wherein the at least one compensation means comprises at least one compensation coil means, wherein a compensation field is generatable by the compensation coil means, wherein at least a part of the power transfer field received by the at least one detection means is compensatable by the compensation field, and/or wherein at least a part of the power transfer field is detectable by the compensation coil means. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 33, 34)
- at least one means for the detection of interfering bodies, wherein the at least one means for the detection of interfering bodies comprises at least one exciter coil means for generating an exciter field and at least one detector coil means which is associated with the at least one exciter coil means;
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30. A system for the inductive transfer of energy, comprising at least one primary coil unit for generating at least a part of an electromagnetic power transfer field and a secondary coil unit for receiving the electromagnetic field generated by the primary coil unit;
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device for the detection of an interfering body, wherein the device comprises at least one means for the detection of interfering bodies, wherein the at least one means for the detection of interfering bodies comprises at least one exciter coil means for generating an exciter field and at least one detector coil means which is associated with the at least one exciter coil means, wherein the device comprises at least one evaluation means for detecting a coupling state between the at least one exciter coil means and the at least one detector coil means and/or for detecting a change of the coupling state, wherein the interfering body is detectable as a function of the coupling state and/or of the change of the coupling state, wherein the device comprises at least one compensation means for compensating an electromagnetic influence of the primary coil unit and/or of a secondary coil unit on the coupling state between the at least one exciter coil means and the at least one detector coil means, wherein the at least one means for the detection of interfering bodies is constructed separately from the primary coil unit, wherein the proportion of the power transfer field in the field received by the at least one detector coil means is reducable by the compensation means and/or the proportion of the output signal which is generated by the at least one detector coil means as a function of the received power transfer field is reducable by the compensation means, wherein the at least one compensation means comprises at least one compensation coil means, wherein a compensation field is generatable by the compensation coil means, wherein at least a part of the power transfer field received by the at least one detection means is compensatable by the compensation field, and/or wherein at least a part of the power transfer field is detectable by the compensation coil means. - View Dependent Claims (35)
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31. A method for the detection of at least one interfering body in a system for the inductive transfer of energy, wherein the system for the inductive transfer of energy comprises at least one primary coil unit for generating at least a part of an electromagnetic power transfer field, the method comprising generating, an exciter field by at least one exciter coil means of a means for the detection of interfering bodies;
- receiving at least partially the exciter field at least one detector coil means of the means for the detection of interfering bodies which is associated with the at least one exciter coil means, detecting a coupling state between the at least one exciter coil means and the at least one detector coil means and/or a change of the coupling state;
detecting the interfering body as a function of the coupling state and/or of the change of the coupling state, compensating an electromagnetic influence of the primary coil unit and/or of a secondary coil unit on the coupling state between the at least one exciter coil means and the at least one detector coil means by at least one compensation means, and constructing the at least one means for the detection of interfering bodies separately from the primary coil unit,wherein the proportion of the power transfer field in the field received by the at least one detector coil means is reduced by the compensation means and/or the proportion of the output signal which is generated by the at least one detector coil means as a function of the received power transfer field is reduced by the compensation means.
- receiving at least partially the exciter field at least one detector coil means of the means for the detection of interfering bodies which is associated with the at least one exciter coil means, detecting a coupling state between the at least one exciter coil means and the at least one detector coil means and/or a change of the coupling state;
Specification