Design and electromagnetic analysis of a HTS linear synchronous motor

Abstract

Abstract-High temperature superconducting (HTS) linear synchronous motor (LSM) integrated with HTS magnetic levitation system, can realize self-levitation and self-guidance without any sliding friction, which will have important applications in many fields such as electromagnetic aircraft launch system, maglev transportation. This paper presents the design and electromagnetic analysis of a HTS LSM, which is levitated by a magnetic levitation system consisting of HTS bulkspermanent magnet (PM) guideways. Numerical analysis and magnetic field finite element analysis (FEA) methods are applied to analyze the thrust, levitation and guidance force characteristics, and the electromagnetic performance of HTS LSM under no-load and load situations are studied with the analysis results are given. Finally, the primary motor running testing results are provided.

Performance Characteristics of an HTS Linear Synchronous Motor With HTS Bulk Magnet Secondary

“…In order to achieve the decoupling of the coupled equations, the mathematical model of HTSLSM is established under d-q axis coordinate system as follows. 4 Current equation…”

“…The high temperature superconducting (HTS) linear motors developed so far can be mainly classified by the principle and structure as follows: 1) HTS linear reluctance motor (LRM) with ordinary copper windings on the primary (stator) and zero-field-cooled (ZFC) HTS bulk poles on the secondary (mover) [1,2]; 2) HTS linear synchronous motor (HTSLSM) with ordinary copper windings on the primary and HTS bulk or coil magnets on the secondary [3][4][5][6][7][8][9][10]; 3) HTSLSM and linear induction motor (LIM) with HTS windings on the primary [11,12]. These HTS linear motors can be further divided into single-sided, double-sided, and cylindrical types according to their structures.…”

Performance Analysis of a Linear Motor with HTS Bulk Magnets for Driving a Prototype HTS Maglev Vehicle

“…To investigate the application potential of the HTS maglev, the authors of this paper have developed a prototype vehicle as illustrated schematically in Fig. 1 [5][6][7]. The interaction between the HTS bulks on the movable body and the PM guideways (PMGs) on the ground generates a strong levitation force with passive and self-stabilizing features.…”

Performance analysis of a linear synchronous motor with HTS bulk magnets

“…The secondary of the linear motor is placed on the bottom of the vehicle, which can be a PM array for a linear synchronous motor [8] or a copper/aluminum sheet for a linear induction motor [9]. The PMs in the secondary can be replaced by an array of YBCO HTS bulk magnets [10]. With the advance of HTS techniques, it has been reported that HTS bulks can trap a magnetic field well above 2.3 T at 77 K [11].…”

“…This paper carries out further analysis of the presented HTS bulk magnet linear synchronous motor (LSM) for driving a HTS maglev vehicle model [10]. The numerical model of HTS bulk magnet is firstly investigated.…”