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SVPWM Techniques and Applications in HTS PMSM Machines Control 总被引:2,自引:0,他引:2
This paper introduces the principle of space vector pulse width modulation (SVPWM), and discusses a method for implementing the SVPWM based on MATLAB/SIMULINK, as well as modeling of AC servo system with permanent magnet synchronous motor (PMSM). Simulation results show that the model is effective, and the method provides a frame of reference for software and hardware designs which can be applied in high temperature superconducting (HTS) flywheel energy storage system (FESS) and linear motor (LM). 相似文献
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A permanent magnet linear synchronous motor (PMLSM) for a high temperature superconducting (HTS) maglev system has been studied, including the motor structure, control strategy, and analysis techniques. Finite element analysis (FEA) of magnetic field is conducted to accurately calculate major motor parameters. Equivalent electrical circuit is used to predict the drive's steady-state characteristics, and a phase variable model is applied to predict the dynamic performance. Preliminary experiment with a prototype has been made to verify the theoretical analysis and the HTS-PM synchronous driving technology. 相似文献
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Schwartz J. Effio T. Xiaotao Liu Le Q.V. Mbaruku A.L. Schneider-Muntau H.J. Tengming Shen Honghai Song Trociewitz U.P. Xiaorong Wang Weijers H.W. 《Applied Superconductivity, IEEE Transactions on》2008,18(2):70-81
High-field superconducting solenoids have proven themselves to be of great value to scientific research in a number of fields, including chemistry, physics and biology. Present-day magnets take advantage of the high-field properties of Nb3Sn, but the high-field limits of this conductor are nearly reached and so a new conductor and magnet technology is necessary for superconducting magnets beyond 25 T. Twenty years after the initial discovery of superconductivity at high temperatures in complex oxides, a number of high temperature superconductor (HTS) based conductors are available in sufficient lengths to develop high-field superconducting magnets. In this paper, present day HTS conductor and magnet technologies are discussed. HTS conductors have demonstrated the ability to carry very large critical current densities at magnetic fields of 45 T, and two insert coil demonstrations have surpassed the 25 T barrier. There are, however, many challenges to the implementation of HTS conductors in high-field magnets, including coil manufacturing, electromechanical behavior and quench protection. These issues are discussed and a view to the future is provided. 相似文献
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在工业自动化领域,永磁同步电动机在中小功率控制系统中发挥着重要作用。本项目采用多采样率方法构建永磁同步电机控制系统,其主要解决的问题包含多采样率下的速度及参数辨识、永磁同步电机多采样率滑模变结构控制系统设计。 相似文献
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The interaction region (IR) magnets for the proposed Very Large Hadron Collider (VLHC) require high gradient quadrupoles and high field dipoles for high luminosity performance. Moreover, the IR magnets for high energy colliders and storage rings must operate in an environment where the amount of energy deposited on superconducting coils is rather large. In the case of doublet IR optics with flat beams, the design of the first 2-in-1 quadrupole defines the geometry and pole tip field in this and other IR magnets. This paper will present a novel design of this magnet that allows a very small separation between the two apertures. A brief discussion of the conceptual magnetic design of this and other magnets for interaction regions is given. The influence of critical current density in superconductor (a higher value of which is most beneficial to high performance IR magnet design) is also discussed. Since high temperature superconductors (HTS) retain most of their critical current density at high fields and at elevated temperatures, they offer an attractive possibility for the IR magnet designs of future colliders or upgrades of present colliders. 相似文献
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Wang L. Xu F.Y. Liu X.K. Yang G.D. Cui J.S. Ji Z.M. Bai W. Jia L.X. 《Applied Superconductivity, IEEE Transactions on》2008,18(2):146-149
A pair of dual-purpose superconducting quadrupole magnets and a superconducting detector solenoid were fabricated and installed in Beijing Electron-Positron Collider Upgrade (BEPCII). The magnets are symmetrically inserted into the BESIII detector with respect to the interaction point. They are identical, iron-free, non-collared, multi-layered and active shielded superconducting magnets for the micro-beta focusing at the interaction region of the collider rings. Each quadrupole magnet is composed of seven coils at different operating currents wound layer by layer on a common cylindrical support. The magnet has an overall effective length of 0.96 m and provides a good field aperture of 65 mm in diameter. They are cooled by supercritical helium in order to eliminate the flow instabilities in constrained cooling channels. The BESIII superconducting solenoid magnet was designed to provide an axial magnetic field of about 1.0 T over the tracking volume and to meet the requirement of particle momentum resolution to particle detectors. A single layer of coil, in-direct cooling by forced two-phase helium, high purity aluminum based stabilizer and NbTi/Cu superconductor is adopted for the solenoid. The solenoid is 3.4 m in diameter and 3.89 m in length. This paper presents the design of the superconducting magnets in the BEPCII as well as their cryomodules. The cooling system for the magnets is also discussed. 相似文献
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Theoretical analyses are carried out on a magnetic suspension and a linear synchronous motor, both utilizing superconducting magnets. The derived theory is applied to the studies of the high-speed train models. In the suspension system investigated here, the roadbed is equipped with normal conducting coils. The magnetic lift force is found to be pulsating, and a design criterion for eliminating the pulsation components in the lift force is derived. An improved suspension system is proposed, which consists of a "ladder-type conductor" in the roadbed. This new system is investigated theoretically. An end effect of the suspension system is also studied. In the linear synchronous motor, the methods of minimizing reaction forces are derived. The combined magnetic suspension and propulsion system is analyzed. It is found that the influence of the track loops for the suspension on the linear synchronous motor is not very significant. 相似文献
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This paper presents the design, analysis and PWM vector control of a hybrid permanent magnet hysteresis synchronous (PMHS) motor with a view to improve the performances of motors for electric vehicle applications. This hybrid design combines the advantageous performance features of both conventional hysteresis motors and permanent magnet motors. Electrical equivalent circuits of the PMHS motor are developed for both the synchronous and asynchronous modes of operation. PWM vector control simulation results for the motor drives are given. Finally, a laboratory prototype hybrid hysteresis permanent magnet motor was built. Test results validate the superior performances of the new motor 相似文献
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Kalsi S.S. Szczepanowski A. Snitchler G. Picard H. Sidi-Yekhlef A. Connor B. Schwall R.E. MacKinnon B. Tallon J.L. Todd G. Neale R. 《Applied Superconductivity, IEEE Transactions on》1998,8(1):30-33
This paper describes the design, construction, and testing of an ion beam switching high-temperature superconducting (HTS) magnet installed at Institute of Geological and Nuclear Science (IGNS) in New Zealand. It was designed by a consortium comprising American Superconductor Corporation (ASC), ISYS, Applied Engineering Technologies (AET), the New Zealand Institute for Industrial Research and Development (IRL), and Alphatech. The work was also supported in part by New Zealand Foundation for Research and Technology-Technology for Business Growth Programme. The magnet generates 0.72 T in the airgap between two 410×700 mm warm iron poles. The Bi-2223 HTS coils are conduction-cooled with a single stage Gifford-McMahon (G-M) type cryocooler for steady-state operation. The magnet was fully tested at ASC during the fall of 1996. This represents the first large-scale fully operational HTS physics magnet announced so far. The successful operation of this magnet has verified maturation of HTS magnet technology employing conduction cooling techniques with G-M type cryocoolers. Long term operation of this magnet in continuous use will prove the reliability of HTS magnet systems in critical applications and is expected to open future opportunities for HTS in other related areas 相似文献
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本文设计了基于Super-twisting滑模速度控制器的永磁同步电机直接转矩控制系统,仿真分析了参数变化对系统输出特性的影响,分析结果表明,采用Super-twisting滑模速度控制器的永磁同步电机直接转矩控制系统比采用PI速度控制器的永磁同步电机直接转矩控制系统的鲁棒性强。 相似文献
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A brief design review of permanent magnet synchronous motors has been presented. A procedure has been developed to predict the steady state and dynamic performances of a brushless permanent magnet synchronous motor. Finite element analysis has been combined with a lumped parameter circuit model in order to provide satisfactory engineering information. To this end, two coordinated steps are involved. One is to develop a unified lumped parameter circuit model for both steady state and dynamic analysis. The second step is to extract the individual lumped parameters from finite element solutions based on corresponding equivalent circuits, each with a pre-determined topology. The proposed techniques have been experimentally verified in a laboratory permanent magnet synchronous motor 相似文献
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Shi-Uk Chung Ji-Won Kim Byung-Chul Woo Do-Kwan Hong Ji-Young Lee Yon-Do Chun Dae-Hyun Koo 《Mechatronics》2013,23(2):172-181
A typical iron-core permanent magnet linear synchronous motor (PMSLM) suffers force ripple originated from detent force. Rare earth permanent magnets (PMs) in stationary part cause cost issue. This paper introduces a doubly salient PMLSM (DSPMLSM) which reduces force ripple and number of PMs in stationary part. A prototype DSPMLSM is made based on geometry optimization by response surface methodology (RSM) considering multiple responses combined with 2D finite element analysis (FEA). Analysis and experimental results show promising results that the proposed DSPMLSM displays low force ripple and good positionability. 相似文献
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针对永磁同步电动机直接转矩控制系统转矩和定子磁链脉动问题,采用电压空间矢量脉宽调制(SVPWM)的永磁同步电动机直接转矩控制方法。根据在每一个控制周期内,计算出参考磁链和所估计磁链的偏差,选择相邻非零矢量和零矢量,并精确地计算出各自的作用时间,然后利用线性组合法将其合成为新的电压矢量。仿真结果表明,所提出的控制方案是有效的,明显地改善转矩和磁链脉动,并且有很好的动态和稳态性能。 相似文献
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The following topics were discussed: the superconducting magnets for the Large Hadron Collider; superconducting magnets for the Relativistic Heavy Ion Collider; undulators; the RIKEN cyclotron; HERA magnets; high field dipole magnets; detector magnets; the CMS detector; the ATLAS detector; high field solenoid magnets; fusion magnets; magnet electrodynamics; magnetic resonance; energy storage; superconducting power transformers; permanent magnets; magnetic levitation; low temperature superconductors; cable in conduit superconductors; high temperature superconductors; current leads and cryogenics 相似文献
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Tutelea L.N. Myung Chin Kim Topor M. Ju Lee Boldea I. 《Industrial Electronics, IEEE Transactions on》2008,55(2):492-500
A linear and respective nonlinear state space model of a linear permanent magnet oscillatory machine is defined and then its parameters are computed from tests. The experiments were performed on two linear machine prototypes, one with interior permanent magnets and flux concentration and the other with surface permanent magnets. The finite element method model, validated on the existing prototype, shows further improvement possibilities of the interior permanent magnet machine. Dynamic tests and simulations with mechanical coupling of the two machines are used to validate the model in motion and on load. Good agreement between theory and tests in terms of various variables, including the linear position measured with a Laser-based transducer, has been observed. 相似文献