Comments on "Magnetically levitated micro PM motors by two types of active magnetic bearings"

Author

Assunção, Edvaldo ; Teixeira, Marcelo C M

Author_Institution

Dept. of Electr. Eng., Univ. Estadual Paulista, Sao Paulo, Brazil

Volume

7

Issue

1

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

99

Lastpage

100

Abstract

This note clarifies the design of proportional derivative (PD) controllers for the magnetic levitation systems of micro permanent magnet (PM) motors proposed in the original paper of Komori and Yamane (ibid., vol.6, p.43-9, 2001). It is shown that the PD controllers cannot stabilize the described levitated micro motors because it is necessary to use other values of parameters for these controllers. We present necessary and sufficient conditions for the stability of the controlled systems described in the paper.

Keywords

control system synthesis; magnetic bearings; magnetic levitation; micromotors; permanent magnet motors; stability criteria; two-term control; PD controller design; active magnetic bearings; magnetically levitated micro PM motors; necessary and sufficient conditions; permanent magnet motors; stability conditions; stability criteria; Automatic control; Computer languages; Frequency estimation; Frequency measurement; Magnetic levitation; Manipulator dynamics; Mathematical model; Micromotors; Robot control; Robotics and automation;

fLanguage

English

Journal_Title

Mechatronics, IEEE/ASME Transactions on

Publisher

ieee

ISSN

1083-4435

Type

jour

DOI

10.1109/3516.990893

Filename

990893