Electrical machine
US3974406A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1975 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Apr 11, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electrical machine including a rotor, a plurality of permanent magnets mounted on the rotor, a stator spaced from the rotor by an air gap, and electrical windings disposed on the stator to be traversed by the magnetic fields of the permanent magnets, the rotor is elastically or resiliently held relative to the stator by a rotor bearing, the stator includes a stator body made of an electrically nonconductive and nonmagnetizable material for preventing hysteresis losses, eddy current losses, and magnetic reaction forces on the rotor, and the permanent magnets, the windings and stator are arranged for causing the magnetic fields of the permanent magnets to pass through the air gap between rotor and stator, the windings, and the stator body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.