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A transfer‐function approach to the analysis and design of zero‐power controllers for magnetic suspension systems
Author(s) -
Mizuno Takeshi,
Takemori Yuichiro
Publication year - 2002
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10049
Subject(s) - transfer function , electromagnetic suspension , control theory (sociology) , suspension (topology) , zero (linguistics) , maximum power transfer theorem , power (physics) , signal (programming language) , engineering , electric power system , control engineering , voltage , function (biology) , computer science , control (management) , mathematics , physics , electrical engineering , magnet , artificial intelligence , linguistics , philosophy , quantum mechanics , homotopy , evolutionary biology , biology , pure mathematics , programming language
Abstract A transfer function approach is applied to the analysis and design of zero‐power controllers for magnetic suspension systems. The general structures of controllers achieving zero‐power control are derived for both current‐ and voltage‐controlled magnetic suspension systems. For the former type of system, there are two basic approaches: feeding back the velocity signal and introducing a minor feedback of the integral of the current. Both approaches are applicable to the latter type of system. In addition to them, the self‐sensing suspension also achieves zero‐power characteristics automatically. A direct synthesis method for zero‐power control is developed based on the analysis. Several experiments are carried out with a single‐degree‐of‐freedom model. The experimental results show the effectiveness of the proposed synthesis method. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 141(2): 67–75, 2002; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10049