Permanent magnet alternator speed detection circuit with feedback at lower speeds
US7586204B2 · kind B2 · utility
4Cited by
19References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2008 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Apr 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P9/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet alternator is driven by a turbine engine to supply three phases of power to a control circuit for the engine. A shunt regulator delivers current to the control circuit, and a voltage supply is also included to deliver power for a period of time as the alternator is gaining speed at startup. A speed detection circuit detects the speed of the shaft for diagnostic purposes and a feedback circuit overrides a control for the supply of the current at lower speeds such that the speed detection circuit will be accurate even at lower speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.