Gearless motorized roller with variable frequency controller
US5918728A · kind A · utility
38Cited by
22References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G23/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A drive roller for a conveyor is rotated by a brushless D.C. motor without any intervening gear reducer. The drove roller has a laminated metal stator with at least three windings external to the stator core. The stator is fixed to a rigid axially extending shaft which supports a roller tube and a permanent magnet rotor on bearings. The rotor is fixed to the roller tube and closely spaced from the stator. A variable frequency power supply controls the induced magnetic field in the stator to control the rotational speed of the drive roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.