Title:
ROTATING ELECTRICAL MACHINE AND METHOD FOR MEASURING A DISPLACEMENT OF A ROTOR OF A ROTATING ELECTRICAL MACHINE
Document Type and Number:
WIPO Patent Application WO/2013/063709
Kind Code:
A3
Abstract:
A rotating electrical machine comprises a stator (2), a rotor (3) and at least one active magnetic bearing (21, 22, 31, 32, 33) comprising a bearing winding (21; 22) which is an air-gap winding and comprises at least a first phase winding (B) and a second phase winding (A). A measurement arrangement (4, 5, 6, 7) measures the radial displacement of the rotor (3) by injecting a displacement measurement injected signal into at least one section of at least one of the bearing windings (21; 22) of one of the magnetic bearings, and capturing at least one displacement measurement signal wherein this displacement measurement signal depends on the rotor displacement in radial direction relative to the stator, this dependency being due to eddy currents in the rotor induced by the displacement measurement injected signal.
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Inventors:
LOOSER ANDREAS (CH)
Application Number:
PCT/CH2012/000246
Publication Date:
June 27, 2013
Filing Date:
November 01, 2012
Export Citation:
Assignee:
ETH ZUERICH (CH)
International Classes:
F16C32/04
Domestic Patent References:
| WO2007140504A1 | 2007-12-13 |
Foreign References:
| US5844339A | 1998-12-01 | |||
| US20100247010A1 | 2010-09-30 |
Other References:
KUWAJIMA T ET AL: "An estimation of the rotor displacements of bearingless motors based on a high frequency equivalent circuit", POWER ELECTRONICS AND DRIVE SYSTEMS, 2001. PROCEEDINGS., 2001 4TH IEEE INTERNATIONAL CONFERENCE ON, PISCATAWAY, NJ, USA,IEEE, vol. 2, 22 October 2001 (2001-10-22), pages 725 - 731, XP010571619, ISBN: 978-0-7803-7233-7
MUKHOPADHYAY: "Do we really need sensors? A Sensorless Magnetic Bearing Perspective", vol. 1st International Conference on Sensing Technology, 23 November 2005 (2005-11-23), Palmerston North, New Zealand, pages 425 - 431, XP002670854, Retrieved from the Internet [retrieved on 20120306]
MUKHOPADHYAY: "Do we really need sensors? A Sensorless Magnetic Bearing Perspective", vol. 1st International Conference on Sensing Technology, 23 November 2005 (2005-11-23), Palmerston North, New Zealand, pages 425 - 431, XP002670854, Retrieved from the Internet
Attorney, Agent or Firm:
FREI PATENTANWALTSBURÖ AG (Zürich, CH)
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