Rotor of induction motor
US4777396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1987 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Oct 23, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor of induction motor comprises a rotary shaft, a cylindrical rotor core fixedly secured on the rotary shaft, a conductive cover fixed on the outer circumferential surface of the rotor core, the conductive cover being formed of a composite material of magnetic material and electrically highly conductive material to have a circumferential permeability smaller than a radial permeability, and a magnetic skin made of a magnetic material and provided on the outer circumferential surface of the conductive cover, the magnetic skin having a circumferential permeability and an electrical conductivity which are set to be larger than the circumferential permeability and an electrical resistivity of the conductive cover, respectively, whereby a loss due to a spatial higher harmonics magnetic flux of higher order generated by a pulsating magnetic flux of slots in a stator of induction motor can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.