Control of an Interior Permanent-Magnet Screw Motor With Power-Saving Axial-Gap Displacement Adjustment

This paper proposes position and force control of a screw motor with power-saving axial-gap displacement adjustment. The motor has a helical-shape mover, which moves in a helical-shape stator without contact. Due to the fabrication process, the actual helical shapes of the mover and the stator are n...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 61; no. 7; pp. 3610 - 3619
Main Authors Fujimoto, Yasutaka, Suenaga, Tsubasa, Koyama, Masato
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2014
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
AC motors
Adjustment
Contact
Core loss
Displacement
electric motors
gap displacement adjustment
helical-motion motors
linear actuators
linear motors
Mathematical analysis
motion control
Motors
permanent-magnet (PM) motors
screw motors
Screws
servomotors
spiral motors
Stators
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Summary:This paper proposes position and force control of a screw motor with power-saving axial-gap displacement adjustment. The motor has a helical-shape mover, which moves in a helical-shape stator without contact. Due to the fabrication process, the actual helical shapes of the mover and the stator are not completely uniform, and the air-gap length between the mover and the stator slightly changes, depending on the mover rotation angle. The d-axis current remains a finite value, and copper loss arises even when the mover is located at the center between the stator cores. A power-saving axial-gap displacement adjustment method is proposed to solve this problem. The proposed control is experimentally verified.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2013.2270215