Axial Transient Vibration of Polygonal Mirror Scanner Motor Supported by Thrust Magnetic Bearing and Radial Air Bearing

Research output: Contribution to journalArticle

Abstract

This paper describes an axial transient vibration of a polygonal mirror scanner rotor driven by a flat type brushless DC motor and supported by an axial magnetic beaing and a radial air bearing. From results of theoretical and experimental investigations, the following characteristics of the vibration and measures to suppress a static displacement and the transient vibration have been deduced: (1) Repulsive magnetic force is induced between the stator coils and rotor magnet under current passage. The force causes axial static displacement and axial transient vibration. (2) Parametric investigation deduced that; (a) high stiffness of the magnetic bearing and low acceleration current linearly reduce both the static displacement and the transient vibration, however, the former may reduce a lifetime of the air bearing due to a dry contact at the start and stop operation and the later prolongs the startup time ; (b) soft start-stop scheme of the motor current is effective to reduce the vibration.

Original languageEnglish
Pages (from-to)1148-1153
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume64
Issue number620
DOIs
Publication statusPublished - 1998 Jan 1
Externally publishedYes

Fingerprint

Bearings (structural)
Thrust bearings
Magnetic bearings
Mirrors
Air
Rotors
Brushless DC motors
Contacts (fluid mechanics)
Stators
Magnets
Stiffness

Keywords

  • Air Bearing
  • Dynamics of Machinery
  • Electromagnetic-Induced Vibration
  • Laser Printer
  • Laser Scanner Motor
  • Magnetic Bearing
  • Transient Response

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

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title = "Axial Transient Vibration of Polygonal Mirror Scanner Motor Supported by Thrust Magnetic Bearing and Radial Air Bearing",
abstract = "This paper describes an axial transient vibration of a polygonal mirror scanner rotor driven by a flat type brushless DC motor and supported by an axial magnetic beaing and a radial air bearing. From results of theoretical and experimental investigations, the following characteristics of the vibration and measures to suppress a static displacement and the transient vibration have been deduced: (1) Repulsive magnetic force is induced between the stator coils and rotor magnet under current passage. The force causes axial static displacement and axial transient vibration. (2) Parametric investigation deduced that; (a) high stiffness of the magnetic bearing and low acceleration current linearly reduce both the static displacement and the transient vibration, however, the former may reduce a lifetime of the air bearing due to a dry contact at the start and stop operation and the later prolongs the startup time ; (b) soft start-stop scheme of the motor current is effective to reduce the vibration.",
keywords = "Air Bearing, Dynamics of Machinery, Electromagnetic-Induced Vibration, Laser Printer, Laser Scanner Motor, Magnetic Bearing, Transient Response",
author = "Hiroyuki Kawamoto",
year = "1998",
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T1 - Axial Transient Vibration of Polygonal Mirror Scanner Motor Supported by Thrust Magnetic Bearing and Radial Air Bearing

AU - Kawamoto, Hiroyuki

PY - 1998/1/1

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N2 - This paper describes an axial transient vibration of a polygonal mirror scanner rotor driven by a flat type brushless DC motor and supported by an axial magnetic beaing and a radial air bearing. From results of theoretical and experimental investigations, the following characteristics of the vibration and measures to suppress a static displacement and the transient vibration have been deduced: (1) Repulsive magnetic force is induced between the stator coils and rotor magnet under current passage. The force causes axial static displacement and axial transient vibration. (2) Parametric investigation deduced that; (a) high stiffness of the magnetic bearing and low acceleration current linearly reduce both the static displacement and the transient vibration, however, the former may reduce a lifetime of the air bearing due to a dry contact at the start and stop operation and the later prolongs the startup time ; (b) soft start-stop scheme of the motor current is effective to reduce the vibration.

AB - This paper describes an axial transient vibration of a polygonal mirror scanner rotor driven by a flat type brushless DC motor and supported by an axial magnetic beaing and a radial air bearing. From results of theoretical and experimental investigations, the following characteristics of the vibration and measures to suppress a static displacement and the transient vibration have been deduced: (1) Repulsive magnetic force is induced between the stator coils and rotor magnet under current passage. The force causes axial static displacement and axial transient vibration. (2) Parametric investigation deduced that; (a) high stiffness of the magnetic bearing and low acceleration current linearly reduce both the static displacement and the transient vibration, however, the former may reduce a lifetime of the air bearing due to a dry contact at the start and stop operation and the later prolongs the startup time ; (b) soft start-stop scheme of the motor current is effective to reduce the vibration.

KW - Air Bearing

KW - Dynamics of Machinery

KW - Electromagnetic-Induced Vibration

KW - Laser Printer

KW - Laser Scanner Motor

KW - Magnetic Bearing

KW - Transient Response

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