Circuit and method for statically testing rotating rectifiers in brushless alternators
US4816756A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Sep 3, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2632
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Rectifiers mounted on the rotor of a brushless alternator are tested by applying an AC voltage to an exciter field winding of the brushless alternator. This applied voltage induces current in a rotor mounted exciter armature winding which is inductively coupled to the exciter field winding and produces current flow through the rectifiers. The magnitude of an even harmonic component of the exciter field winding current is measured and compared to a predetermined magnitude to obtain an indication of the operational status of at least one of the rectifiers. This comparison may be done manually or may be performed electronically in accordance with known techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.