Speed monitoring device
US7378815B2 · kind B2 · utility
3Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2006 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Sep 15, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for redundant speed monitoring of a synchronous motor, which is sine-commutated without the use of sensors and which has a permanently magnetically excited rotor, has a first control unit, a drive output stage, a plurality of drive phases, and a second control unit for monitoring an electrical value of at least one of the drive phases and connected to the drive output stage for turning off the drive output stage when an improper speed state is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.