A.C. electric motors having a stator forming orthogonal magnetic paths
US4764698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Mar 24, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K99/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stator of an A.C. electric motor includes a magnetic core comprising a magnetic ring member and two "U"-shaped magnetic members connected to the ring member. The two "U"-shaped magnetic members hold the ring member therebetween and are angularly spaced from one another around the central axis of the ring member. A primary winding is wound on one of the two "U"-shaped members and a secondary winding is wound on the other "U"-shaped member. The secondary winding is short-circuited by a capacitor. When A.C. voltage is applied to the primary winding, A.C. voltage is induced on the secondary winding at a certain value, or more than the primary voltage. A rotary flux is formed in the ring member by magnetic fluxes induced by primary and secondary A.C. currents. Accordingly, a cage rotor or magnet rotor which is rotatably disposed in the ring member can be rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.