Electro-magnetic closed-loop speed control for air-turbine spindles
US7989972B2 · kind B2 · utility
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4References
20Claims
0Family size
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Key dates
| Filing date | Oct 23, 2006 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | May 1, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method an apparatus for providing speed control in a spindle system are provided. The apparatus includes an air turbine spindle that rotates at a speed, an electromagnetic device coupled to the spindle for creating a torque to maintain a desired speed of the spindle, and a tachometer for generating a measurement of the rotational speed of the spindle. The electromagnetic device applies a torque to the spindle in response to the measurement to change the speed of the spindle to the desired speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.