• Title/Summary/Keyword: Linear motors

Search Result 386, Processing Time 0.033 seconds

Optimal Design for Thrust Ripple Reduction of Stationary Distributed-Armature System

  • Park, Eui-Jong;Jung, Sang-Yong;Cho, Kyoung-Pil;Kim, Yong-Jae
    • Journal of Magnetics
    • /
    • v.21 no.1
    • /
    • pp.72-77
    • /
    • 2016
  • Although the initial cost of permanent-magnet linear synchronous motors is high owing to the installation of armatures over the full length of the transportation lines, linear motors are useful for transportation systems because of their high speed, acceleration, and deceleration. For these reasons, research into reducing the cost of linear motors is necessary, and a stationary distributed-armature system has been suggested for installing armatures in sections where acceleration and deceleration of the mover are required. However, each armature has ends that significantly increase the cogging force, resulting in the increase in the thrust ripple of the mover. Therefore, in order to improve the thrust ripple of the system, the present study aims to provide auxiliary teeth on both ends of the armature to achieve an optimal design through an analysis of the contribution ratio with respect to factors regarding the design of the experiment and the objective function.

Design and Characteristics of Ultrasonic Linear Motor Using $L_14-$B_4$Sandwich-type Vibrator ($L_14-$B_4$샌드위치형 진동자를 이용한 선형 초음파 모터의 설계 및 특성)

  • ;;;;Kenji Uchino
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.13 no.12
    • /
    • pp.1025-1031
    • /
    • 2000
  • An ultrasonic linear motors consist of a slider and an ultrasonic vibrator which generates an elliptical oscillations. The ultrasonic linear motors mainly consist of an ultrasonic vibrator which generates elliptical oscillations. The ultrasonic linear motor fabricated in this paper was the use of the 1st longitudinal(L1) and 4th bending vibrations(B4). In order to low driving voltage and improve the life time of the ultrasonic motor, we used stacked piezoceramics. Stacked piezoceramics are adhered to aluminum elastic material. The finite element method was used to optimize dimension of ultrasonic vibrator and direction of vibratory displacement. As a result of estimating the characteristics of the ultrasonic linear motor, no-load velocity was 0.204[m/s] when applied voltage was 70[ $V_{rms}$] in resonance frequency.y.

  • PDF

초정밀 선형 모터의 열.진동 분석

  • 임경화;이우영;설진수;김현철
    • Proceedings of the Korean Society Of Semiconductor Equipment Technology
    • /
    • 2004.05a
    • /
    • pp.163-168
    • /
    • 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.

  • PDF

The Basic Study on Design of Linear Pulse Motor for Embroidery Machine Characteristics (자수기 특성을 고려한 LPM의 설계에 관한 기초연구)

  • Park, Chang-Soon;Kwon, Tae-Gun
    • Proceedings of the KIEE Conference
    • /
    • 2001.07b
    • /
    • pp.765-767
    • /
    • 2001
  • Linear pulse Motors(LPM) are widely used in fields where smooth linear motion is required, and their position accuracy is higher than other motors. Hybrid linear pulse motors(HLPM) are regarded as an excellent solution to positioning problems that require high accuracy, rapid acceleration and high-speed. The LPM has low mechanical complexity, high reliability, precise open-loop operation and low inertia etc. in many application areas such as factory automation speed positioning, computer peripherals and numerically controlled machine tools. This motor drive system is especially suitable for machine tools the high position accuracy and repeatability. This paper describes about that need of the embroider machine, we want to design position-scanning device for the embroidery machine. At first, to be analysed characteristics of the machine and next designed the LPM. we used the field analysis program, The finite element method(FEM) program tool is employed for calculation the force. The reluctance models will be used the magnetic permeance of air gap by static- conditions. The forces between forcer and platen have been calculated using the virtual work method.

  • PDF

Design Optimization of Linear Synchronous Motors for Overall Improvement of Thrust, Efficiency, Power Factor and Material Consumption

  • Vaez-Zadeh, Sadegh;Hosseini, Monir Sadat
    • Journal of Power Electronics
    • /
    • v.11 no.1
    • /
    • pp.105-111
    • /
    • 2011
  • By having accurate knowledge of the magnetic field distribution and the thrust calculation in linear synchronous motors, assessing the performance and optimization of the motor design are possible. In this paper, after carrying out a performance analysis of a single-sided wound secondary linear synchronous motor by varying the motor design parameters in a layer model and a d-q model, machine single- and multi-objective design optimizations are carried out to improve the thrust density of the motor based on the motor weight and the motor efficiency multiplied by its power factor by defining various objective functions including a flexible objective function. A genetic algorithm is employed to search for the optimal design. The results confirm that an overall improvement in the thrust mean, efficiency multiplied by the power factor, and thrust to the motor weight ratio are obtained. Several design conclusions are drawn from the motor analysis and the design optimization. Finally, a finite element analysis is employed to evaluate the effectiveness of the employed machine models and the proposed optimization method.

The Study on Design and Dynamic Operation Characteristics of Linear Pulse I for Embroidery Machine (자수기에 맞는 LPM의 설계와 구동 특성에 관한 연구)

  • Park, Chang-Soon;Kwon, Tae-Gun
    • Proceedings of the KIEE Conference
    • /
    • 2001.10a
    • /
    • pp.91-93
    • /
    • 2001
  • Linear pulse Motors(LPM) are widely used in fields where smooth linear motion is required, and their position accuracy is higher than other motors. Hybrid linear pulse motors(HLPM) are regarded as an excellent solution to positioning problems that require high accuracy, rapid acceleration and high-speed. The LPM has low mechanical complexity, high reliability, precise open-loop operation and low inertia etc. In many application areas such as factory automation speed positioning, computer peripherals and numerically controlled machine tools, LPM can be used. This motor drive system is especially suitable for machine tools the high position accuracy and repeatability. This paper describes about that need of the embroider machine, we want to design position-scanning device for the embroidery machine. At first, to be analysed characteristics of the machine and next designed the LPM, we used the field analysis program. The finite element method(FEM) program tool is employed for calculation the force. The reluctance models will be used the magnetic permeance of air gap by static-conditions. The forces between forcer and platen have been calculated using the virtual work method. And we used the simulink to know the dynamic characteristics of LPM.

  • PDF

Design and Analysis of Ultrasonic Linear Motor Using Multilayer Piezoceramics (적층 압전세라믹을 이용한 초음파 리니어 모터의 설계 및 해석)

  • Kim, Tae-Yoal;Kim, Beam-Jin;Park, Tae-Gone;Kim, Myong-Ho
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2000.05b
    • /
    • pp.61-64
    • /
    • 2000
  • An ultrasonic linear motor was composed of a slider and a stator vibrator including piezoelectric material and elastic material. The ultrasonic linear motors mainly consist of an ultrasonic oscillator which generates elliptical oscillations. Elliptical oscillations are generated by synthesizing two degenerated modes. The design of a stator for an ultrasonic linear motor was optimized with respect to vibration mode and direction of vibratory displacement by employing the finite element method. Applying multilayer piezoelectric ceramics. we found larger elliptical oscillations. The motors were designed by varying the width of stator vibrator and the thickness. the length and the position of multilayer piezoelectric ceramics.

  • PDF

Design of a optimum structure for Ultrasonic Linear Motor using a travelling wave (진행파를 이용한 직선형 초음파 모터의 최적구조 설계)

  • 김연보;한우석;노용래
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.13 no.4
    • /
    • pp.280-285
    • /
    • 2000
  • The conventional ultrasonic linear motors developed so far utilize a standing wave and are of a pi-type or a hybrid transducer type structure. Traveling wave type bi-direction linear motors have not been developed yet. This paper describes design of a new bi-directional ultrasonic linear motor working by means of a traveling wave. With the finite element method we design and verify validity of the new structure. And we determine its optimal structure size of design variables material and boundary conditions for proper generation of the traveling wave.

  • PDF

Finite Element Analysis of Inverter-fed Linear Induction Motors (인버터구동 선형유도전동기의 특성해석에 관한 연구)

  • Im, Dal-Ho;Kim, Chang-Eob;Kim, Han-Jong
    • Proceedings of the KIEE Conference
    • /
    • 1995.07a
    • /
    • pp.53-55
    • /
    • 1995
  • This paper presents the characteristics of linear induction motors fed by a voltage source PWM inverter. In the calculation, 2D finite element method is used considering the movement by moving mesh. Integro-differential approach is adopted for the copper loss calculation considering the skin effect.

  • PDF

Testing and experimental characterization of a linear permanent magnet actuator for active vehicle suspension

  • Wang, Jiabin;Wang, Weiya
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.1 no.4
    • /
    • pp.509-516
    • /
    • 2012
  • This paper describes the testing and experimental characterization of a linear permanent magnet actuator, which is designed and developed for active vehicle suspension, under both static and dynamic conditions. Since the active suspension unit operates over a wide force-velocity range with varying duty ratios, it is essential to establish an effective thermal model which can be used for assessing temperature rise of the actuator under various operating conditions. The temperature rise of the actuator is measured and the results are compared with the prediction by the derived transient thermal model. It is shown that the measured actuator parameters and characteristics are closed to their predicted values. The linear actuator is controlled by a dSPACE system via a three phase inverter and its velocity tracking performance is presented.