Magnetic bearing arrangement for an open-end spinning device
US6516601B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Jul 25, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2340/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of operating an open-end spinning device (1) whose spinning rotor (3) is supported with its rotor shaft (4) radially and axially positioned via a magnetic bearing arrangement (5) which comprises two magnetic bearings with spaced permanent magnet pairs (33, 34 and 43, 44), a central position control device (50) with actor coils (32, 42), and a rotor position sensor (51). An output signal (ASLS) of the position sensor (51) is processed in the central position control device (50) such that a coil current (i) initiated by a controller (53) is initially regulated toward zero by negative feedback of an integrator (55). A positive feedback of the coil current (i) subsequently takes place by negation of the input signal (ESI) of the integrator to at least intermittently increase the coil current (i) in the actor coils (32, 42) and thereby lift and transfer the spinning rotor (3) from its axial catch bearing (45) into its operating position wherein the coil current (i) is regulated back toward zero in the actor coils (32,42).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.