• 제목/요약/키워드: Linear DC Motor

검색결과 157건 처리시간 0.032초

ENHANCED FUZZY SLIDING MODE CONTROLLER FOR LAUNCH CONTROL OF AMT VEHICLE USING A BRUSHLESS DC MOTOR DRIVE

  • Zhao, Y.S.;Chen, L.P.;Zhang, Y.Q.;Yang, J.
    • International Journal of Automotive Technology
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    • 제8권3호
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    • pp.383-394
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    • 2007
  • Due to the clutch's non-linear dynamics, time-delays, external disturbance and parameter uncertainty, the automated clutch is difficult to control precisely during the launch process or automatic mechanical transmission (AMT) vehicles. In this paper, an enhanced fuzzy sliding mode controller (EFSMC) is proposed to control the automated clutch. The sliding and global stability conditions are formulated and analyzed in terms of the Lyapunov full quadratic form. The chattering phenomenon is handled by using a saturation function to replace the pure sign function and fuzzy logic adaptation system in the control law. To meet the real-time requirement of the automated clutch, the region-wise linear technology s adopted to reduce the fuzzy rules of the EFSMC. The simulation results have shown hat the proposed controller can achieve a higher performance with minimum reaching time and smooth control actions. In addition, our data also show that the controller is effective and robust to the parametric variation and external disturbance.

구동 전압을 고려한 3차원 등가자기회로방법에 의한 선형 직류전동기의 동특성 해석 (Dynamic Characteristic Analysis of Linear DC Motor by 3D EMCN Considering Input Voltage)

  • 하경호;염상부;홍정표;허진;강도현
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제51권2호
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    • pp.61-68
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    • 2002
  • In order to design the Linear DC Motor (LDM) with improved characteristics, transient and steady state analysis are required. furthermore, 3D analysis is also needed to analyze the precise characteristics like thrust, time harmonics. This paper deals with the transient and dynamic characteristic analysis of LDM by coupling of external circuit and motion equation using 3D Equivalent Magnetic Circuit Network Method (EMCN). For the three dimensional analysis of electric machine, EMCN is very effective method that ensures high accuracy similar to FEM and short computation time. Also, The modeling by EMCN easily allows the mover to move with respect to the stater at each time step, and the spatial moving step is determined by the solution of the mechanical motion equation and the computed electromagnetic thrust The results are compared with experimental ones to clarify the usefulness and verify the accuracy of the Proposed method.

등가 자기저항 2D와 3D 유한요소해석에 의한 LHSM의 자계 특성 비교 (Comparison of Magnetic Field Using Equivalent Reluctance 2D and 3D FEA for Linear Homopolar Synchronous Motor)

  • 장석명;정상섭;양현섭;류동완;윤인기;성소영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 A
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    • pp.3-5
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    • 1999
  • The 4-pole LHSM was composed of the figure-of-eight shaped 3-phase armature windings, DC field windings, and the segmented secondary with the transverse bar track. Three dimensional model of LHSM provided the equivalent reluctance and PM model for 2D FEA. From these 2D FEA models, when the motor was fed by DC and 3-phase currents, the magnetic field were calculated and compared with the results of 3D FEA.

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선형 브러시리스 DC 모터의 정밀 위치제어에 관한 연구 (A Study on the Precision Position Control for the Linear BLDC Motor)

  • 전영한;김지원;전진홍;전정우;강도현
    • 대한전기학회논문지:시스템및제어부문D
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    • 제50권9호
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    • pp.417-422
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    • 2001
  • The brushless DC motor(BLDCM) is widely used in many applications. One of the application of the BLDCM is the stage which is one of process in the semiconductor manufacturing processes. Very high performance is required in the stage process. In this paper, the 1 degree of freedom positioning system for the basic technology of the stage is studied. The linearization method is proposed to make the controller design procedures easy by measuring the thrust force ripple using the strain gauge. And through the experiments, it is proved that the inner velocity control loop is necessary to make more precise positioning control system.

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BLDC 전동기의 토크리플 저감을 위한 새로운 전류제어 알고리즘에 대한 연구 (A New Current Control Algorithm for Torque Ripple Reduction of BLDC Motors)

  • 김태성;안성찬;현동석
    • 전력전자학회논문지
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    • 제6권5호
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    • pp.416-422
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    • 2001
  • BLDC (Brushless DC) 전동기는 선형적인 토크 대 전류, 속도 대 전압특성을 갖고 있으며 기계적 전기적인 잡음이 없고, 가감속 제어가 용이하며, 토크 대 관성의 비가 매우 높아 소형으로 높은 출력을 낼 수 있다는 장점을 가지고 있다. 그러나 전기자 전류의 전환 (Commutation)시 고정자 권선의 인덕턴스 성분과 역기전력으로 인해 발생되는 전류리플은 BLDC 전동기의 구동시 발생되는 토크리플의 중요한 원인이 되어, 고정밀 서보계통에 대한 응용에 큰 장애가 되고 있다. 본 논문에서는 퓨리에 시리즈계수를 사용한 새로운 전류제어 알고리즘을 개발하여 상전류 전환시 발생하는 전류리플을 최소화함으로서 토크리플을 현저히 감소 시켰으며, BLDC 전동기의 구동을 위해 널리 사용되고 있는 UNIPOLAR PWM 방식과 시뮬레이션 및 실험을 통해 비교함으로써, 새로운 알고리즘의 효용성을 입증하고자 한다.

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과도상태에서 유도전동기의 선형화특성 개선에 관한 연구 (Improvement of Linearized Characteristics for Induction Motor in the Transient State)

  • 윤병도;김민회;정재윤
    • 대한전기학회논문지
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    • 제39권2호
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    • pp.164-174
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    • 1990
  • The improvement of linearized characteistics of induction motor control system with field oriented method is presented in this paper. A fully digitally controlled induction motor driver system based on the proposed linear control condition is described. The control system consists of IBM-PC/AT microcomputer, VSI PWM Inverter, and PI controller with softwave. By controlling the torque component, the rated flux component can be kept constant, even in the transient state. It is clearly confirmed by experiment that the improvement of the vector control condition is satisfactory. A simplified control model of an induction motor similar to the model for a separately excited DC motor drive system is obtained.

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초정밀 대면적 미세 형상 가공기의 구조 특성 해석 (Structural Characteristic Analysis of an Ultra-Precision Machine for Machining Large-Surface Micro-Features)

  • 김석일;이원재
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회A
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    • pp.1469-1474
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    • 2007
  • In recent years, research to machine large-surface micro-features has become important because of the light guide panel of a large-scale liquid crystal display and the bipolar plate of a high-capacity proton exchange membrane fuel cell. In this study, in order to realize the systematic design technology and performance improvements of an ultra-precision machine for machining the large-surface micro-features, a structural characteristic analysis was performed using its virtual prototype. The prototype consisted of gantry-type frame, hydrostatic feed mechanisms, linear motors, brushless DC servo motor, counterbalance mechanism, and so on. The loop stiffness was estimated from the relative displacement between the tool post and C-axis table, which was caused by a cutting force. Especially, the causes of structural stiffness deterioration were identified through the structural deformation analysis of sub-models.

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부하 상태에 따른 선형 BLDC 전동기의 동특성 해석 및 실험적 고찰 (Power & Industrial System R&D Center, Hyosung Corporation)

  • 조원영;김병국;김태현;황동원;정군석;조윤현;이권순
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.80-82
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    • 2005
  • This paper presents the dynamic characteristics of a linear brushless DC(BLDC) motor with permanent magnet excitation for the precision conveyor according to the load condition. In order to investigate the accurate dynamic performance of tile linear BLDC motor driving with 6 step inverter- fed, finite element techniques coupling with external circuit models, together with the simultaneous simulation of motion of the mover system, arc proposed. The results of finite element analysis arc compared to the experimental ones.

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소형브러시리스 DC 전동기의 토크 특성향상을 위한 최적 구동법에 관한 연구 (A STUDY ON OPTIMAL DRIVING METHODS FOR IMPROVING TORQUB CHARACTERISTIC OF MINIATURE BRUSHLESS DC MOTOR)

  • 박귀태;송명헌;김용일
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1989년도 하계종합학술대회 논문집
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    • pp.16-20
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    • 1989
  • In this paper, we describe the optimal driving method and magnetic flux distribution of permanent magnet which enhance torque characteristics in small-sized 3-phase brushless DC motors. The disadvantages of conventional $120^{\circ}$ constant current drive method are torque ripple, switching noise and spike voltage due to the inductance of stator coil. This shortcommings can be avoided by the switching slew-rate of driving current which is called linear voltage driving method. The aim of this study is to analyze linear voltage driving method quantatively and to determine optimal drive current waveform through computer simulation. The selection of commutation angle and slew rate of a new driving current at switching instants makes torque ripple index minimize and average torque maximize. And the validity of this new driving method was assured by Fourier analysis. Considering two dimensional nonlinear magnetic flux distribution on the permanent magnet, we suggest optimal flux distribution according to the presented driving method which improves torque characteristics.

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적응제어 알고리즘과 80286 마이크로 프로세서를 이용한 DC 서보모터의 강인한 속도제어기의 구현 (An implementation of the speed controller for DC servomotor using adaptive control algorithm and 80286 $\mu$-processor)

  • 김중석;이건영;양해원
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1991년도 추계학술대회 논문집 학회본부
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    • pp.353-356
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    • 1991
  • This paper proposes a robust direct adaptive control system implementation using a 80286 microprocessor-based system for controlling the speed of a DC servo motor. In this paper, assuming that the unmodeled dynamics of the plant are sufficiently small in the low-frequency range, the plant as linear time-invariant system is the second relative degree, we construct the direct adaptive control system with the algorithm considering plant unmodeled dynamics and execute the experiment, and compare the characteristics with those of PI algorithm's. It shows that an easy implementation of the built controller is due to the usage of software for the algorithm.

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