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
First Claim
1. 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 detector for the detection of interfering bodies,wherein the at least one detector for the detection of interfering bodies comprises at least one exciter coil for generating an exciter field and at least one detector coil which is associated with the at least one exciter coil;
at least one electronic evaluator for detecting a coupling state between the at least one exciter coil and the at least one detector coil 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; and
at least one compensator 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 and the at least one detector coil,wherein the at least one detector for the detection of interfering bodies is constructed separately from the primary coil unit,wherein a proportion of the power transfer field in the field received by the at least one detector coil is reducible by the at least one compensator and/or a proportion of the output signal which is generated by the at least one detector coil as a function of the received power transfer field is reducible by the compensator,wherein the at least one compensator comprises at least one compensation coil, wherein a compensation field is generatable by the compensation coil, andwherein at least a part of the power transfer field received by the at least one detector for the detection of interfering bodies is compensatable by the compensation field, and/or wherein at least a part of the power transfer field is detectable by the compensation coil.
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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.
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Citations
19 Claims
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1. 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:
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at least one detector for the detection of interfering bodies, wherein the at least one detector for the detection of interfering bodies comprises at least one exciter coil for generating an exciter field and at least one detector coil which is associated with the at least one exciter coil; at least one electronic evaluator for detecting a coupling state between the at least one exciter coil and the at least one detector coil 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; and at least one compensator 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 and the at least one detector coil, wherein the at least one detector for the detection of interfering bodies is constructed separately from the primary coil unit, wherein a proportion of the power transfer field in the field received by the at least one detector coil is reducible by the at least one compensator and/or a proportion of the output signal which is generated by the at least one detector coil as a function of the received power transfer field is reducible by the compensator, wherein the at least one compensator comprises at least one compensation coil, wherein a compensation field is generatable by the compensation coil, and wherein at least a part of the power transfer field received by the at least one detector for the detection of interfering bodies is compensatable by the compensation field, and/or wherein at least a part of the power transfer field is detectable by the compensation coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18)
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14. 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, a secondary coil unit for receiving the electromagnetic field generated by the primary coil unit and a device for the detection of an interfering body, wherein the device comprises:
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at least one detector for the detection of interfering bodies, wherein the at least one detector for the detection of interfering bodies comprises at least one exciter coil for generating an exciter field and at least one detector coil which is associated with the at least one exciter coil, wherein the device comprises at least one electronic evaluator for detecting a coupling state between the at least one exciter coil and the at least one detector coil 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 compensator 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 and the at least one detector coil, wherein the at least one detector for the detection of interfering bodies is constructed separately from the primary coil unit, wherein a proportion of the power transfer field in the field received by the at least one detector coil is reducible by the compensator and/or the proportion of the output signal which is generated by the at least one detector coil as a function of the received power transfer field is reducible by the compensator, wherein the at least one compensator comprises at least one compensation coil, wherein a compensation field is generatable by the compensation coil, wherein at least a part of the power transfer field received by the at least one detector for the detection of interfering bodies is compensatable by the compensation field, and/or wherein at least a part of the power transfer field is detectable by the compensation coil. - View Dependent Claims (19)
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15. 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:
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generating an exciter field by at least one exciter coil of a detector for the detection of interfering bodies; receiving at least partially the exciter field by at least one detector coil of the detector for the detection of interfering bodies which is associated with the at least one exciter coil, detecting a coupling state between the at least one exciter coil and the at least one detector coil 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 and the at least one detector coil by at least one compensator, and constructing the at least one detector for the detection of interfering bodies separately from the primary coil unit, wherein a proportion of the power transfer field in the field received by the at least one detector coil is reduced by the compensator and/or a proportion of the output signal which is generated by the at least one detector coil as a function of the received power transfer field is reduced by the compensator.
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Specification