Failed fuse detector and detecting method for rotating electrical equipment
US4635044A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1980 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Oct 16, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and an arrangement of apparatus is provided for remotely detecting the existence of a failed fuse of a brushless exciter rotor's rotating rectifier assembly. A conducting fuse produces a magnetic field which is sensed by elements on a stationary structure. A signal corresponding to the conducting status of each fuse is synchronized to the rotational speed of the brushless exciter rotor by means of a preselected oscillator frequency and the status of each individual fuse is retained and displayed until the next inspection of that fuse. Alarm circuitry enables automatic detection of a failed fuse and shutdown in the event of multiple fuse failures. Since this method looks for the instance of current through each fuse, it operates in a fail-safe manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.