Electric motor rotor selectively formed of one of two different magnetic units
US8575805B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2011 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Jan 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/278
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor rotor includes a core member having a plurality of locating grooves spaced around the periphery thereof and outer rotation-stopping portions, and a magnetic unit arranged around the periphery of the core member and defining a plurality of magnetic zones corresponding to the space between each two adjacent locating grooves. The magnetic unit can be a magnetic barrel having inner rotation-stopping portions for abutting against the outer rotation-stopping portions of the core member. Alternatively, the magnetic unit can be made comprising a plurality of magnets to form the multiple magnetic zones and a hoop for attaching to the magnets to secure the magnets to the periphery of the core member. Using the core member with the said two magnetic units can make two different rotors that have the common advantages of quick assembly, accurate alignment of magnetic zones and cost-effectiveness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.