• Title, Summary, Keyword: tubular linear machine

Search Result 9, Processing Time 0.055 seconds

Comparative Study of Armature Reaction Field Analysis for Tubular Linear Machine with Axially Magnetized Single-sided and Double-sided Permanent Magnet Based on Analytical Field Calculations

  • Shin, Kyung-Hun;Park, Min-Gyu;Cho, Han-Wook;Choi, Jang-Young
    • Journal of Magnetics
    • /
    • v.20 no.1
    • /
    • pp.79-85
    • /
    • 2015
  • This paper presents a comparative study of a Tubular Linear Machine (TLM) with an Axially Magnetized Single-sided Permanent Magnet (AMSPM) and an Axially Magnetized Double-sided Permanent Magnet (AMDPM) based on analytical field calculations. Using a two-dimensional (2-D) polar coordinate system and a magnetic vector potential, analytical solutions for the flux density produced by the stator windings are derived. This technique is significant for the design and control implementation of electromagnetic machines. The field solution is obtained by solving Maxwell's equations in the simplified boundary value problem consisting of the air gap and coil. These analytical solutions are then used to estimate the self and mutual inductances. Two different types of machine are used to verify the validity of these model simplifications, and the analytical results are compared to results obtained using the finite element method (FEM) and experimental measurement.

Analytical and Experimental Study for Electromagnetic Performances of a Tubular Linear Machine with Axially Magnetized Single-sided Permanent Magnets

  • Shin, Kyung-Hun;Jeong, Kyoung-Hun;Choi, Jang-Young;Hong, Keyyong;Kim, Kyong-Hwan
    • Journal of Magnetics
    • /
    • v.20 no.4
    • /
    • pp.432-438
    • /
    • 2015
  • This paper presents an electromagnetic analysis of a tubular linear machine with axially magnetized permanent magnets using improved analytical techniques. Based on the magnetic vector potential and a two-dimensional polar-coordinate system, the magnetic field and armature reaction field can be derived. Using these, equivalent circuit parameters, such as the electromotive force and inductance, can be obtained analytically. Finally, the generating characteristics are derived with the equivalent circuit method. In this study, the finite element method was employed to provide a comparative evaluation, and experiments were conducted to validate the results of the analytical analysis.

Design and Characteristics Investigation of Air-core Tubular Linear BLDC Motor (공심슬롯 원통형 선형 BLDC 전동기의 설계 및 특성 고찰)

  • Moon, Ji-Woo;Cho, Yun-Hyun
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.57 no.4
    • /
    • pp.603-609
    • /
    • 2008
  • Slotless linear brushless DC motor are widely used in precision machine applications because of their advantages such as low of detent force, negligible iron loss. But they have a disadvantage such as low thrust density, thrust ripple, and excessive use of permanent magnet materials. These lead to undesirable performance and high production cost. In this paper, we deal with the design and characteristics investigation of a air-core tubular linear brushless DC(TLBLDC) motor with air-core stator and permanent magnet mover. And to investigate the static and dynamic characteristics of air-core TLBLDC motor, the prototype machine is manufactured and analyzed by F.E.M. and Matlab simulink simulations. Especially, dynamic characteristics of air-core TLBLDC motor driven with 6 step inverter are simulated by F.E.M.coupling with external circuit and Matlab simulink program, and measured for the prototype motor. The simulation results are compared to the experimental results such as current waves, thrust and speed curve.

Analysis and Experimental Verification of the Moving-Magnet Linear Actuator with Cylindrical Halbach and Radial Array

  • Jang, Seok-Myeong;Park, Jang-Young;Lee, Sung-Ho;Cho, Han-Wook;Jang, Won-Bum
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
    • /
    • v.3B no.4
    • /
    • pp.179-187
    • /
    • 2003
  • In the machine tool industry, direct drive linear motor technology is of increasing interest as a means to achieve high acceleration and to increase reliability. This paper analyzes and compares the characteristics of the tubular linear actuator with the cylindrical Halbach and radial array, respectively. A tubular linear actuator with cylindrical Halbach array, consisting of parallel magnetized arc segments instead of ideal radial and axial magnetized rings, is manufactured. The magnetic field solutions due to the PMs and to the currents are established analytically in terms of vector potential, using the 2-D cylindrical coordinate system. Motor thrust, flux linkage and back emf are then derived. Thrust characteristics according to such design parameters as magnet height and air gap length are also given. The results are validated extensively by comparison with finite element analysis (FEA). Test results such as thrust measurements are also given to confirm the analysis.

Analysis and Control Parameter Estimation of a Tubular Linear Motor with Halbach and Radial Magnet Array

  • Jang Seok-Myeong;Choi Jang-Young;Cho Han-Wook;Lee Sung-Ho
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
    • /
    • v.5B no.2
    • /
    • pp.154-161
    • /
    • 2005
  • In the machine tool industry, direct drive linear motor technology is an interesting means to achieve high acceleration, and to increase reliability. This paper analyzes and compares the characteristics of a tubular linear motor with Halbach and radial magnet array, respectively. First, the governing equations are established analytically in terms of the magnetic vector potential and two dimensional cylindrical coordinate systems. Then, we derive magnetic field solutions due to the PMs and the currents. Motor thrust, flux linkage and back emf are also derived. The results are shown to be in good conformity with those obtained from the commonly used finite element method. Finally, control parameters are obtained from analytical solutions.

Preliminary study on a 3D field permanent magnet flux switching machine - from tubular to rotary configurations

  • Wang, Can-Fei;Shen, Jian-Xin
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.1 no.4
    • /
    • pp.505-508
    • /
    • 2012
  • A permanent magnet flux switching (PMFS) machine has a simple rotor, whilst both magnets and coils are set in the stator, resulting in easy removal of heat due to both copper loss and eddy current loss in magnets. However, the volume of magnets used in PMFS machines is usually larger than in conventional PM machines, and leakage flux does exist at the non-airgap side. To make full use of the magnets and gain higher power density, a novel 3-dimensional (3D) field PMFS machine is developed. It combines merits of the tubular linear machine, external-rotor rotary machine and axial-flux rotary machine, hence, offers high power density and peak torque capability, as well as efficient utility of magnets owing to the unique configuration of triple airgap fields.

Characteristic Analysis of Tubular Linear Motor with Halbach and Vertical Magnetized PMs (Halbach/수직 자화 영구자석을 갖는 Tubular 모터의 특성해석)

  • Jang, Seok-Myeong;Choi, Jang-Young;Lee, Sung-Ho;Lee, Seung-Won
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.119-121
    • /
    • 2003
  • In the machine tool industry, direct drive linear motor technology is of increasing interest as a means to achieve high acceleration, and to increase reliability [1]. In this paper, we analyze and compare the characteristics of tubular motor with halbach and vertical magnet array respectively. We derive magnetic field solutions due to the PMs and to the currents. Motor thrust is then derived. The results are shown in good conformity with those obtained from the commonly used finite element method.

  • PDF

Experimental and Characteristic Analysis of Tubular Type Linear Oscillating Actuator with Halabch Magnetized PMs Mover (Halbach배열 영구자석 가동자로 구성된 Tubular형 직선 왕복 액추에이터의 특성해석 및 실험)

  • Jang, S.M.;Choi, J.Y.;Lee, S.H.;Lee, S.L.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.756-758
    • /
    • 2003
  • In the machine tool industry, direct drive linear motor technology is of increasing interest as a means to achieve high acceleration, and to increase reliability. This paper deals with the characteristics of tubular type linear oscillating actuator with Halbach magnet array. The magnetic field solutions are derived analytically in terms of vector potential, two dimensional cylindrical coordinate system and Maxwell's equations. Motor thrust, flux linkage, back emf are then derived. The results are shown in good conformity with those obtained from the commonly used finite element method. Test results such as thrust measurements are also given to confirm the analysis.

  • PDF

Characteristics Analysis of Tubular Linear Induction Motor Specially-designed for Elevator (엘리베이터용 TLIM의 특성해석)

  • Im, Dal-Ho;Kim, Young-Joong;Yoon, Sang-Baeck;Hwang, Sang-Yeon
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.612-614
    • /
    • 1992
  • This paper presents the analysis method of TLIM, for the purpose of developing linear induction motor drive for elevators. The transfer matrix to multilayer on cylindrical coordinate is derived. The equivalent circuit constructed from coupling complex phasor makes it possible to obtain characteristics of TLIM. The validity of the method lo verified by comparing the experimental and theoretical results for a pilot machine in locked status.

  • PDF