Method and apparatus for measuring core loss of a laminated ferromagnetic structure
US4573012A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Feb 14, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/123
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A core loss tester employs separate cables for excitation and pickup. Testing is performed at a fixed flux density in the ferromagnetic core. A processing circuit on the output of the pickup coil scales the voltage developed so that, when excitation current is increased so that the indicated output of the pickup coil equals the effective cross-sectional area of the flux path, the fixed predetermined value of flux density is produced. When this condition is achieved, the excitation current times the sensed flux-induced voltage provides a measurement of the core loss in watts. Excitation is accomplished with a multi-conductor cable looped once or more times through the core with the conductors in the cable connected in series by mating together of a connector at each end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.