• Title/Summary/Keyword: Rotary motor

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Design and Analysis of Swingarm Type Rotary Actuator for Micro ODD (초소형 광디스크 드라이브용 스윙암 방식 로터리 엑츄에이터 설계 및 분석)

  • 김동욱;홍어진;박노철;박영필;김수경
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2003.05a
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    • pp.780-785
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    • 2003
  • Recently the trends in information storage devices need small size, mobility, high capacity, and low power consumption etc. To satisfy those, the development of high performance actuator is an important issue. Compared with general linear actuator for optical disk drive, swingarm type rotary actuator is suitable to design in small form factor and has fast access time for random access. Swingarm actuator is designed considering the structural problem and the actuating force of VCM(Voice Coil Motor). The increase of mass caused by optical components makes vibration problems of swing-arm, therefore resonance frequency should be increased and inertia has to be reduced. ANSYS FEM tool is employed in optimizing swingarm. The VCM is designed using 3-D electro-magnetic analysis, and parameters of magnetic circuit are determined to matte large flux density. The large flux density enables to achieve low power consumption. VCM holder is designed to get the mass balance of total actuator and this balance reduces the magnitude of critical mode relative to pivot bearing, It is expected that swingarm type rotary actuator designed by this method is available to variable type of micro optical disk drives.

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A Study on Deduction of Equivalent Circuit Parameters and Verification of Control Algorithm of Thrust Force of a Small-scaled LIM for a Railway Transit (철도차량용 선형유도전동기 축소형 모델의 등가회로 파라미터 도출 및 추진력 제어 알고리즘 검증 연구)

  • Park, Chan-Bae;Mok, Hyung-Soo;Lee, Ju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.7
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    • pp.1248-1254
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    • 2010
  • Authors conducted a deduction of some parameters using the magnetic equivalent circuit method and a verification study of the thrust force control algorithm of a rotary-typed small-scaled linear induction motor for a railway transit. In a LIM, it is possible to express the parameters of the magnetic equivalent circuit into a function of the shape of the secondary aluminium plate and the airgap between the LIM primary core and the secondary aluminium plate. It means that the LIM properties can be changed considerably by the shape of the secondary aluminium plate and the airgap between the LIM primary core and the secondary aluminium plate. So, authors analyzed a tendency of changes of the magnetic equivalent circuit parameters and the LIM characteristics by changing of the airgap of the secondary aluminium plate of a rotary-typed small-scaled LIM. And authors conducted a verification study of the indirect vector control algorithm with constant slip frequency by using the rotary-typed small-scaled LIM tester set on the basis of the calculated LIM parameters. Finally authors accomplished a research on applicability for LIM railway transit.

Decoupling Control of Tractive and Vertical Force of Linear Induction Motor (선형 유도전동기의 추진력 및 수직력 제어 방식)

  • Oh, Sung-Chul
    • Proceedings of the KIEE Conference
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    • 1996.07a
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    • pp.289-291
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    • 1996
  • Linear induction motor(LIM) is widely used to drive magnetic levitation train. To drive LIM, different control method compared with conventional rotary type machine is needed. Since vertical force is generated inherently and it effects on the levitation system, vertical force should be kept constant for stable levitation. To keep vertical force constant, slip frequency should be kept constant. Once slip frequency is kept constant, tractive force can be controlled by adjusting motor currents. In this paper, control methods used so far arc analyzed with some experimental results and decoupling control algorithm is proposed to control tractive and vertical force separately. Control algorithm is verified through simulation.

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A Experiment of the damping effect for Electromagnetic Damper using DC Motor and Ballscrew (DC Motor와 Ballscrew를 이용한 Electromagnetic Damper Damping 효과 실험)

  • Kang, Jeong-Ho;Lee, Hac-Choel;Jeong, Young-Suk
    • Proceedings of the KIPE Conference
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    • 2008.06a
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    • pp.124-126
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    • 2008
  • In this Paper, the modeling of the electromagnetic damper for automobile suspension is presented and the validation of the model is demonstrated by experiments. An electromagnetic damper, composed of a rotary DC motor, and a ball screw and nut. The damper then operates as a linear electric actuator. The damper then operate as a linear electric actuator. The results indicate the proposed system is feasible and it is proved that the electromagnetic damper has better than oil damper of passive control system.

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Detent Force Analysis in Permanent Magnet Linear Synchronous Motor Considering Longitudinal End Effects

  • Li, Liyi;Ma, Mingna;Chan, C.C.
    • Journal of international Conference on Electrical Machines and Systems
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    • v.2 no.1
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    • pp.9-15
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    • 2013
  • This paper presents a uniform analytical model by energy method and Fourier series expansion to analyze detent force in uneven magnetic field for permanent magnet linear synchronous motor (PMLSM). The model reveals that detent force in long-primary type is mainly influenced by non-ideal distribution of permanent magnet magnetic motive force, while nounified air-gap permeance makes a great impact on detent force of short-primary type. Hence, magnetic field similarity of motor design techniques referring rotary counterpart are adopted. For long-primary type novel method of splitting edge magnets is proposed to reduce end effects force, and optimal widths of edge tooth in short-primary type also verify the effectiveness of magnetic field similarity. The experimental results validate finite element analysis results.

Design Technology of High Speed and Precision Machining Center (초곡속 고정밀 머시닝 센터 설계 기술)

  • Kim, Bup-Min;Choi, Won-Sun;Ha, Jae-Young;Kim, Tae-Hyoung
    • Journal of the Korean Society for Precision Engineering
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    • v.28 no.8
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    • pp.869-877
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    • 2011
  • In order to manufacture precision parts which are used for IT and BT Industry by machining, users need higher speed & precision machining center. So, for development of this kind of machine, we designed gantry type machining center which is piling of 3 axes on one moving body and the 2-axis rotary table is fixed on the base. It is applied linear motor that is instead of ball-screw and servo-motor combination and 50,000 rpm high-speed spindle. Composite material structure called mineral casting or resin concrete is applied also. This paper presents design technology and evaluated results of high speed and precision machining center.

Fabrication of the SVR with the Improved Voltage Regulating Characteristics by the Structural Modification of the Output Wire Moving Shaft (출력선가동자의 구조변경에 의해 향상된 전압제어 특성을 갖는 SVR의 제작)

  • 홍성훈;강문성
    • Journal of Institute of Control, Robotics and Systems
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    • v.8 no.10
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    • pp.867-873
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    • 2002
  • We have designed and fabricated the slidacs type automatic voltage regulator(SVR) that is able to control the output voltage continuously according to load variation. Especially, the frictions between the surface of contact of the slidacs coils and the output wire moving shaft arc reduced by modifying the mechanical configuration of surface of contact of slidacs from the conventional sliding one into the proposed rotary one composed of cylindrical bearing. Thus, SVR using cylindrical bearing proposed in this study has less noise than the conventional one owing to the reduction of friction, and its breakdown ratio caused by the abrasion of contact materials is reduced as well. We have designed U motor driving circuit for controlling the output wire moving shaft, and introduced the digital control method using the pulse width modulation(PWM) output for controlling DC motor.

Development of a Driving Operation System for Vehicle Simulator (차량 시물레이터의 운전석 시스템 개발)

  • 유성의;박민규;유기성;이민철
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.291-291
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    • 2000
  • A vehicle driving simulator is a virtual reality device which a human being feels as if the one drives a vehicle actually. Driving Operation System acts as an interface between a driver and a driving simulator. This paper suggests the driving operation system for a driving simulator. This system consists of a controller, DC geared motor, MR brake, rotary encoders, steeping motor and bevel gear box. Reaction force and torque on the steering system were made by DC_Motor and MR_Brake. Reaction force and torque on the steering system were compare between real car and a driving simulator. The controller based on the 80C196KC micro processor that manage and transfer signal.

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The Design of a Speed-position Controller using a Parameter Estimation Method for the Linear Brushless DC Motor (파라미터 추정방법을 이용한 선형추진브러시리스 직류전동기의 속도-위치제어기 설계)

  • 박성수;최중경;변지섭;윤성은;류정오
    • Proceedings of the IEEK Conference
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    • 2001.06e
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    • pp.143-146
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    • 2001
  • Servomotors, especially linear brushless servomotors have numerous advantages over ball screws, timing belts, rack/pinion drives and friction drives compared wi th rotary servomotors This paper proposes an linear regression method as the estimated ion of unknown parameters from the linear brushless DC motor The estimated parameters are used to tune the gain of controller. In order to agree with this purpose, Digital Signal Processor (TMS320F240), developed for implementation of the motor control, is adopted in this study. The processor playing an important role in controller has A/D converters, PWM generators, riched I/O ports internally.

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초정밀 선형 모터의 열.진동 분석

  • 임경화;이우영;설진수;김현철
    • Proceedings of the Korean Society Of Semiconductor Equipment Technology
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    • 2004.05a
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    • pp.163-168
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    • 2004
  • Linear motor can directly apply to the system needed linear mot ions without rotary mot ions. To control a high-speed and high-resolution, the development of the linear motors is recently required in the high-integrated and speed process industry. This paper presents vibration analyses as well as measurement standards of the newly developed linear motors through analyzing the vibration characteristics and thermal behaviors of the advanced products. Vibration experiments are conducted for identifying the hysteresis and vibration level during operation. They are also included in the modal test to analyze the vibration. Analytic data using Finite Element Method (FEM) are compared with the results of the modal. Loss of temperature generated the linear motor leads to a serious deformation within its parts. The thermal behaviors are very important factor in linear motor. The FEM and experiments make it possible to understand these characteristics.

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