Rotary electrical device
US6262508A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
It is an object of the present invention to provide a rotary electrical device that can be manufactured easily, and which produces a high output torque at low operating speeds. The rotary electrical device comprises: a stator core. The rotary electrical device comprises: a stator core having Z.sub.1 stator slots for receiving three-phase windings which generate a rotational magnetic field of p magnetic pole pairs in the stator core, and Z.sub.1 permanent magnets being provided in tooth sections fabricated between the stator slots around the stator core; and a rotor core having Z.sub.2 permanent magnets being provided around the rotor core; wherein Z.sub.1, Z.sub.2 and p are related by an expression Z.sub.2 =Z.sub.1.+-.p, and direction of magnetic poles of all permanent magnets are aligned identically in a radial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.