Multiple magnetic flywheel driven by a centrifugal clutch
US4303843A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Jul 17, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/225
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic flywheel for a manually-driven magneto megohmmeter with step variable voltage comprising a rotor formed by a ring of magnetic material carrying permanent magnets, and a stator, disposed inwardly of the rotor and formed by an assembly of magnetic circuits each having a C-shape with a coil wound around the central portion thereof and with two pole surfaces at the ends. In order to reduce the starting torque, the number of pairs of permanent magnets is one less than the number of magnetic circuits, and the angular distance between the pole surfaces of one magnetic circuit is equal to the angular distance between two adjacent permanent magnets. Also, the arc length of each pole surface of a magnetic circuit is substantially equal to half the angular distance between two adjacent permanent magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.