Direct drive inside-out brushless roller motor
US6710505B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1016
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A brushless d.c. motor is integrated with a conveyor roller (14) by placing a plurality of stator coils (15) on a stationary shaft (18) and securing a rotor (10) with segments (12) of permanent magnetic material to the inside of the conveyor roller (14). In one embodiment the rotor (10) is directly secured to the roller while in a second embodiment, the rotor (10) is disposed inside of a cylindrical metal housing (40) that is press fit inside of the roller. Commutation is provided by an external motor controller (54) which is connected by conductors (37) through a passageway (36) in the shaft (18) to a circuit board (20), where sensors (23) are mounted to sense rotor position for purposes of commutation of the stator coils (15).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.