High-speed rotor and controller for controlling magnetic bearings used therefor
US5576587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2300/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Active magnetic bearings supporting a rotor operated at high speeds is controlled by a controller. Tracking filters provided in the controller pick up forward vibration components in synchronism with the rotational speeds from the displacement signals of the rotor, and a mode separating circuit provided in a mode gain controller takes out displacements of the 3rd and 4th modes. Then, a gain controller provided in the mode gain controller determines suitable gains for the separated displacement signals. A mode synthesizing circuit provided in the mode gain controller synthesizes a controlled variable for each of the bearings from the control signals that are processed for the respective modes. By adding the control variable to the respective bearings, the vibration amplitude is suppressed in critical speed zones of high orders, and the rotor is stably operated up to a high-speed range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.