Inductive rotating transmitter

• US 7,663,462 B2
• Filed: 09/21/2004
• Issued: 02/16/2010
• Est. Priority Date: 09/23/2003
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Makuth, Jens, Schimmer, Jurgen
• Primary Examiner(s): NGUYEN, TUYEN T
• Application Number:
  US10/571,281
• Publication Number:
  US 20070024575A1
• Time in Patent Office: 1,974 Days
• Field of Search: 336115-118, 336130-135, 336/200, 336/225, 336/229
• US Class Current: 336/130
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 17/062 Toroidal core with turns of coil around it
• CPC Class Codes: H01F 2019/085 Transformer for galvanic isolation
• CPC Class Codes: H01F 38/18 Rotary transformers

Abstract

The invention relates to an inductive rotating transmitter, comprising a fixed piece and a rotating piece, whereby the fixed piece and the rotating pierce have a common virtual rotational axis and the rotating piece rotates about the fixed piece. The data transmission is carried out over at least one data transmission path by means of at least one inductive element and the data transmission path is arranged outside the rotational axis of the rotating transmitter.

Claims

1. An inductive rotary transducer for transmitting data, comprising:

a fixed part;

a rotating part rotating about the fixed part;

a common virtual rotational axis shared by the rotating and fixed parts; and

a first and a second inductive element for bidirectional data transmission via at least one data transmission path, the data transmission path arranged outlying the common virtual rotational axis, wherein the first inductive element is configured to transmit data and the second inductive element is configured to receive data, and wherein the first inductive element is arranged adjacent to the second inductive element relative to the virtual rotational axis.

2. The inductive rotary transducer according to claim 1, further comprising a housing having a duct enclosing the virtual rotational axis.

3. The inductive rotary transducer according to claim 1, wherein the inductive element is a transformer comprising at least first and second coils assigned to the fixed respectively rotating part.

4. The inductive rotary transducer according to claim 3, wherein the first coil is arranged adjacent to the second coil relative to the virtual rotational axis.

5. The inductive rotary transducer according to claim 3, wherein the first coil is arranged coaxially around the second coil.

6. The inductive rotary transducer according to claim 3, wherein the first or the second coil is a toroidal coil.

7. The inductive rotary transducer according to claim 3, wherein the first or the second coil is a planar coil.

8. The inductive rotary transducer according to claim 1, wherein the inductive element comprises a device for concentrating a magnetic field generated by the inductive element.

9. The inductive rotary transducer according to claim 8, further comprising a decoupling device arranged between the first and second inductive elements for separating a first magnetic field generated by the first inductive element from a second magnetic field generated by the second inductive element.

10. The inductive rotary transducer according to claim 1, wherein the inductive rotary transducer is configured to transmit data according to a bus protocol.

11. The inductive rotary transducer according to claim 10, wherein the bus protocol is a Fast Ethernet protocol.

12. The inductive rotary transducer according to claim 1, wherein the inductive rotary transducer forms one integrated unit.