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Method for adjusting resistance of electromagnet in magnetic bearing and for sensorless determination of position of object mounted in magnetic bearing, taking into account adjusted value of resistance
US8970079B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8970079-B2 |
| Application number | US-201113636630-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 8, 2011 |
| Priority date | Apr 1, 2010 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
Official abstract text for this publication.
For an object on a bearing mounting having a magnetic bearing providing a magnetic field generally produced by an electromagnet, the bearing is regulated based on a position of the object relative to the bearing. The position of the object is determined by reference to an estimate of the inductance obtained using a least squares method, in which the electrical resistance of the bearing is taken into account. The resistance is subject to variations, for example due to temperature fluctuations; however, the electrical resistance can be estimated by regulating the inductance error, Δ{circumflex over (L)}={circumflex over (L)} 2,s LS −{circumflex over (L)} 1,s LS down to zero, where the resistance adjustment facility may be a low-pass filter and an integration controller.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for adjustment of a value of an electrical resistance of a magnetic bearing, comprising: actuating at least one electromagnet in the magnetic bearing by a pulse width modulated voltage having a waveform with at least one charging up phase as a first phase and at least one discharge phase as a second phase; measuring and evaluating a current i through and a voltage u across each electromagnet to determine first and second inductance values {c…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F16C32/0451Primary
Mechanical Engineering · mapped topic
- F16C32/0448Primary
Mechanical Engineering · mapped topic
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- What does patent US8970079B2 cover?
- For an object on a bearing mounting having a magnetic bearing providing a magnetic field generally produced by an electromagnet, the bearing is regulated based on a position of the object relative to the bearing. The position of the object is determined by reference to an estimate of the inductance obtained using a least squares method, in which the electrical resistance of the bearing is taken…
- Who is the assignee on this patent?
- Bachmaier Georg, Bachmann Christian, Bergmann Dominik, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification F16C32/0451. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).