Brushless direct current motor
US4025831A · kind A · utility
15Cited by
5References
17Claims
0Family size
Inventor
Key dates
| Filing date | Feb 18, 1975 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Feb 18, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current motor is provided by a rotor provided with a plurality of permanent magnets, at least one fixed electromagnet slightly spaced from the rotor periphery and a magnetically operated reversing switch controlled by the permanent rotor magnets to excite an electromagnet to alternately attract and repel the permanent magnets. The switch may be controlled by magnets other than the rotor magnets, rotated synchronously with the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.