Speed detection circuits for permanent magnet alternators
US9653971B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Jan 2, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet alternator (PMA) includes a rotatable shaft, windings, a shunt regulator circuit, and a speed detection circuit. The rotatable shaft is connected electromagnetically to the windings. The shunt regulator circuit is electrically connected to the windings. A current sense transformer with a primary coil is electrically connected to the shunt regulator circuit. A secondary coil is electrically connected to a comparator circuit with reference voltage and generates voltage pulse indicating PMA speed. The voltage pulses form an output corresponding to and indicative of rotation speed of the shaft suitable for processing by a processor to present a PMA speed indication for use in the overall system architecture as a measurement parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.