A two-dimensional homopolar linear DC motor with new position detectors

Author

Wang, Yijia ; Yamaguchi, Masaki ; Kano, Yoshio

Author_Institution

Tokyo Univ. of Agric. & Technol., Japan

Volume

2

fYear

1997

fDate

3-6 Aug 1997

Firstpage

625

Abstract

This paper presents a novel two-dimensional homopolar linear DC motor (LDM) which can realize motion two-dimensionally. For precise position control purposes, two kinds of position detecting methods are proposed. The position in one direction is detected by means of a capacitive sensor with a feedback loop which makes the output of the sensor largely immune to the variation of gaps between electrodes. The position detection in the other direction is achieved by exploiting the inductance difference between the two driving coils, instead of using an independent sensor. From the experimental results, good thrust distributions and satisfactory linearity of the detecting methods are obtained. The maximum detecting error is 0.9% and 1.7% respectively

Keywords

feedback; homopolar motors; linear motors; machine control; machine testing; machine theory; position control; position measurement; sensors; 2-D homopolar linear DC motor; capacitive sensor; detecting error; detection linearity; driving coils inductance; feedback loop; position control; position detectors; precise position control; thrust distributions; Capacitive sensors; Coils; DC motors; Detectors; Feedback loop; Inductance; Linearity; Magnetic fields; Position control; Two dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference - Nagaoka 1997., Proceedings of the

Conference_Location

Nagaoka

Print_ISBN

0-7803-3823-5

Type

conf

DOI

10.1109/PCCON.1997.638257

Filename

638257