Integral coaxial commutation and rotor magnets and apparatus and method for making same
US4494028A · kind A · utility
16Cited by
10References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An integral field and commutation magnet for use in DC brushless motor has both commutation and field magnet portions. Magnetized segments in both the field and commutation portions have oppositely oriented magnetic fields in the outward radial direction. An apparatus and method for making the one piece integral field and commutation magnet employ a fixture with a current conductor associated with magnetic flux paths corresponding to the segments of the commutation and field magnet portions to magnetize a single piece of permanently magnetizable material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.