Coil unit of a device for inductive transmission of electrical power
First Claim
1. A coil unit of a device for inductive transmission of electrical power, said coil unit comprising:
- a cover;
a base;
a coil arranged between the cover and the base, during operation of the device the cover facing another coil unit and the base facing away from the other coil unit;
at least one support element arranged between the cover and the base, the at least one support element mechanically supporting the cover on the base;
at least one cavity formed between the cover and the support element by first protrusions on at least one of the cover and the support element, the cover mechanically supported on the support element via the first protrusions;
at least one other cavity formed between the base and the support element by second protrusions on at least one of the support element and the base, the support element mechanically supported on the base via the second protrusions; and
proximity sensors to detect an object lying on the cover arranged in the at least one cavity formed between the cover and the support element,wherein the proximity sensors are inductive sensors in the form of measuring coils, which are distributed in a regular arrangement laterally over the coil unit; and
wherein two layers of measuring coils are arranged one above the other, all of the measuring coils of one layer arranged between first protrusions, all of the measuring coils of the other layer are arranged enclosing first protrusions, and the two layers are laterally offset relative to each other so that the measuring coils of one layer cover the intermediate spaces not covered by the measuring coils of the other layer.
2 Assignments
0 Petitions
Accused Products
Abstract
In a coil unit of a device for inductive transmission of electrical power with a cover, a base and a coil arranged between the cover and base. During operation of the device, the cover faces another coil unit and the base faces away from it. At least one support element, which mechanically supports the cover on the base, is arranged between the cover and the base. At least one cavity is formed between the cover and the support element by protrusions on the cover and/or on the support element, whereby the cover lies on the support element, and/or at least one cavity is formed between the base and the support element by protrusions on the support element and/or on the base, whereby the support element lies on the base. Sensors or elements for magnetic flux guidance can be arranged protected from mechanical load in such a cavity.
7 Citations
15 Claims
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1. A coil unit of a device for inductive transmission of electrical power, said coil unit comprising:
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a cover; a base; a coil arranged between the cover and the base, during operation of the device the cover facing another coil unit and the base facing away from the other coil unit; at least one support element arranged between the cover and the base, the at least one support element mechanically supporting the cover on the base; at least one cavity formed between the cover and the support element by first protrusions on at least one of the cover and the support element, the cover mechanically supported on the support element via the first protrusions; at least one other cavity formed between the base and the support element by second protrusions on at least one of the support element and the base, the support element mechanically supported on the base via the second protrusions; and proximity sensors to detect an object lying on the cover arranged in the at least one cavity formed between the cover and the support element, wherein the proximity sensors are inductive sensors in the form of measuring coils, which are distributed in a regular arrangement laterally over the coil unit; and wherein two layers of measuring coils are arranged one above the other, all of the measuring coils of one layer arranged between first protrusions, all of the measuring coils of the other layer are arranged enclosing first protrusions, and the two layers are laterally offset relative to each other so that the measuring coils of one layer cover the intermediate spaces not covered by the measuring coils of the other layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification