Propulsion, levitation, and guidance (PLG) are the main technologies of high-speed maglev system. A linear synchronous motor (LSM) integrated with PLG is presented, which can simultaneously realize three functions system by only one electromagnetic novel bilateral Fourier decomposition method for analyzing 3-D force characteristics LSM proposed, has advantages wider range solutions, simpler formulation, shorter computation times, satisfactory precision. First, topological structure...

The characteristics of coreless-type linear synchronous motor, which is applied in the propulsion system electrodynamic suspension maglev train are calculated and analyzed by more accurate analytical model. First, magnetomotive force distribution model vehicle coils proposed according to their racetrack shape. Then, on basis space harmonic method, characteristic analysis formula motor with single-layer double-layer armature winding presented. Second, air-gap flux density, back force, thrust...

Propulsion, levitation, and guidance (PLG) are the key technologies of high-speed maglev system. A linear synchronous motor (LSM) combined with PLG is presented, which can simultaneously realize three functions PLG. novel analytical method for analyzing 3-D electromagnetic forces LSM proposed. First, overall structure operating principle system discussed. Second, model proposed, expressions propulsion force, levitation force obtained according to change in magnetic field energy during...

Due to the existence of end effect vehicle coils in electrodynamic suspension (EDS) maglev, fluctuation output parameters and guidance system is common, which has an impact on stability motor driving system. In this article, considering coils, a new magnetomotive force (M.M.F) distribution model suitable for EDS maglev proposed. First, M.M.F array established. Then, based space harmonic method equivalent circuit loop, expressions levitation current, drag force, stiffness, stiffness are...

Propulsion, levitation and guidance characteristics are the key technology of electro-dynamic suspension Maglev train. An air-core integrated linear synchronous motor with asymmetric primary combined coils is introduced, which can not only simultaneously realize propulsion, performances, but also analyze electromagnetic performance variation under pitching condition. The novel three-dimensional analytical method proposed for analyzing transient electromechanical motor. Firstly, topology...

The optimal non-contact onboard power source for superconducting electrodynamics suspension (EDS) maglev is the linear generator. As a result, development of generator has been significantly aided by research its properties. A method figuring out maximum output EDS maglev's suggested. It advantages straightforward formulation, quick calculation time, and acceptable precision. First, electromagnetic model taking into account eddy current loss outer vessel constructed in accordance with...

Although a lot of labor and financial forces have been put into safety work, railway accidents continue to be the major concern in China. The aim this study is identify significant factors contributing enable stakeholders fully learn from accidents. Cognitive Reliability Error Analysis Method - Railway Accidents (CREAM-RAs) taxonomy framework was proposed classify human, technology, organization To establish Multi-attribute Dataset (MARA-D), 392 accident reports were collected collated under...

Propulsion, levitation and guidance (PLG) are the major technologies for maglev train. An improved structure of transverse flux linear synchronous motor (TFLSM) is presented in this article, which can simultaneously realize PLG functions train by only one electromagnetic device. Firstly, topological operating principle TFLSM analyzed. Secondly, three-dimensional (3-D) analytical model proposed, expressions inductance forces obtained. Finally, 3-D force characteristics at different supply...

This study is concerned with proposing much more effective Luenberger-like fuzzy observers than relevant multiinstant reported in recent literature, other words, less conservative results can be given while computing resource consumed as an important premise. For the first time, variation bound of two adjacent time-variant Lyapunov matrices encountered synthesis observer characterized by a contraction factor, and thus key replacement lagged term developed order to construct synchronization...

This paper proposed a mutation model-based test case generation method of the Chinese train control system with automatic operation function. According to several related specifications that had been issued, took typical Temporary Speed Restriction Server (TSRS) handover scenario as an example build Symbolic Model Verifier (SMV) model it. By using Computation Tree Logic (CTL) formula describe properties model, and checker NuSMV checking established SMV in order confirm is correct. Then,...

The curved track or uneven side wall has a great impact on the stable running of high-speed electric superconducting (SC) suspension system. change electromechanical performances SC linear synchronous motor (LSM) with rolling transient condition is an important research topic. A novel and comprehensive double-Fourier analysis method proposed, to forces stiffness characteristics coreless-type LSM (SC-LSM) under posture. Primary, topological posture performance SC-LSM are proposed. Following,...

Power systems interfaced with a large-scale integration of wind generation may suffer the voltage instability. Specifically, generators can also operate as reactive power source limited capacity, and reasonable allocation in farms plays significant role maintaining static stability. To this end, paper proposes two-stage optimization method for farm SVG. Firstly, active loss is optimized via between compensator. Secondly, stability margin evaluated by performing convex programming. The...

Dynamic stability analysis of superconducting electro-dynamic maglev train under lateral and yawing motion condition is the key research content. The novel three-dimensional electromagnetic model integrated linear synchronous motor in with operation proposed, which can not only simultaneously achieve propulsion, levitation guidance performances vehicle, but also analyze dynamic performance condition. analytical method introduced for analyzing force characteristics Firstly, topology structure...

A novel transverse flux linear synchronous motor (TFLSM) is proposed, which can realize propulsion, levitation, and guidance functions in maglev train. Considering the cogging effect, a analytical method for calculating air-gap magnetic density of TFLSM proposed. First, overall configuration operation principle are discussed. Second, model permeability coefficients primary secondary established calculated; then, obtained. Besides, propulsion force calculated considering effect. Finally,...

Herein, a gradient microstructure with an average grain size of 1.27 μm was obtained for 0.5MgO/Mg-3Zn-0.2Ca (wt.%) composites through screw rolling. Results show that rolling improved the comprehensive tensile properties composites, yield strength, ultimate strength and elongation increasing from 167.3 MPa, 247.7 MPa 27.4% to 256.6 284.1 40.6%, respectively, after eight deformation passes. The increments are primarily attributed fine-grain strengthening. Further, plasticity increased number...