Design and Control of Hybrid-type Three-pole Active Magnetic Bearings Using Redundant Coordinates

Cited 6 time in webofscience Cited 0 time in scopus
  • Hit : 663
  • Download : 0
Recently, the design of active magnetic bearings (AMBs) for miniaturized industrial applications puts much emphasis on small size and low-power consumption as well as low-cost system production. In this paper, a novel hybrid type three-pole AMB system is proposed, which is divided into two bearing parts: a three-pole radial AMB and an axial permanent magnet bearing. The radial AMB consists of three active main poles with three coil windings, three sub-poles with radial permanent magnets, generating bias flux, and three Hall diodes, measuring the rotor position. The permanent magnet bearing is made of two facing axially polarized ring-type permanent magnets for passive stability in the axial and angular motion. Compared with the conventional four- or eight-pole AMB, the hybrid three-pole AMB system reduces the power consumption with fewer power amplifiers and is suitable for smaller-sized AMBs. The primary problem in modeling and control of the three-pole AMB in the conventional Cartesian coordinates is the strong coupling in magnetic flux generated by three main and sub-poles. Consequently, the system becomes strongly nonlinear with respect to control inputs as well as states. To resolve this difficulty in treating the strong nonlinearity in the conventional Cartesian coordinates, we introduce the redundant coordinates along with three-pole configuration for modeling and design of controller. Based on the redundant coordinates, three identical decoupled proportional-derivative controllers can be applied, which is very simple compared with previous nonlinear control algorithms developed for three-pole AMBs. Experiments are also carried out with a prototype AMB system to validate the proposed design and control concept based on the redundant coordinates.
Publisher
SAGE PUBLICATIONS LTD
Issue Date
2010-04
Language
English
Article Type
Article
Keywords

SYSTEM

Citation

JOURNAL OF VIBRATION AND CONTROL, v.16, no.4, pp.601 - 614

ISSN
1077-5463
DOI
10.1177/1077546309106152
URI
http://hdl.handle.net/10203/100414
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 6 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0