Permanent magnet rotor with sinusoidal flux pattern
US4748359A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jun 5, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/278
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet rotor wherein a rotary shaft has an orthogonal cross a sectional shape orthogonal in a longitudinal direction of the rotary shaft, a plurality of circular-arc portions which are around the axis of rotation of the rotary shaft, and rectilinear portions which connect the adjacent circular-arc portions with straight lines having no curved portion. Respective permanent magnets, equal in number to the circular-arc portions, are fixed extending over the circular-arc portions and the rectilinear portions. The surface of each permanent magnet remote from the rotary shaft has a cross sectional contour orthogonal to the longitudinal direction of the rotary shaft, forming a circular arc which protrudes outward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.