Comparative Investigation of High Temperature Superconducting Linear Flux-Switching Motor and High Temperature Superconducting Linear Switched Reluctance Motor for Urban Railway Transit

Lu, Minghang; Cao, Ruiwu

doi:10.1109/tasc.2021.3054604

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…The phase voltages can be expressed as functions of the phase currents of the active phases. If the phase currents are chosen as state variables, differentiating (5) with respect to time yields,…”

Section: Voltage Equationsmentioning

confidence: 99%

“…In [4], the design and analysis of a segmental stator double-sided LSRM for railway systems has been discussed. To improve the force density, hightemperature superconducting windings have been used in a single-sided LSRM [5]. An innovative LSRM, including modular and crooked-tooth translator, has been presented in [6] which has high force density and low force ripple compared with conventional motors.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reducing Force Ripples and Enhancing Reliability in LSRMs Through Modern Structure and Advanced Control Systems

Masoudi,

Ben-Brahim,

Gastli

et al. 2024

IEEE Access

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Linear switched reluctance motors (LSRMs) are highly popular due to their simple and robust structure, affordable pricing, and ability to operate at high efficiency. However, a major drawback of these motors is the high ripple force. In this paper, a novel structure for a linear motor with an exceptionally lightweight rotor and a stator with separate poles is presented, making it suitable for use in electric train systems. The proposed system not only significantly reduces force fluctuations but also enables the distribution of force along the length of the moving vehicle, ensuring smooth motion. Moreover, the reliability of the system is enhanced, as the LSRM can continue its motion even in the presence of a fault in one of the phases. In applications with high speeds, the use of a fast controller seems essential, but conventional fast regulators often lack sufficient precision. To address this issue, a new control system is introduced, utilizing a new 12-vector voltage switching table and a current controller. Unlike conventional control methods, the phases firing angle in the proposed system is not fixed. As a result, acceptable performance at different speeds is achieved through an adaptive real-time turn-on position control.INDEX TERMS Multi-stator linear switched reluctance motor, force distribution, Reliability, adaptive phase turn-on, switching table, current control, 2D finite element analysis.

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Section: Voltage Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reducing Force Ripples and Enhancing Reliability in LSRMs Through Modern Structure and Advanced Control Systems

Masoudi,

Ben-Brahim,

Gastli

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…In addition, HTS materials are widely used in machine due to high conductivity and flux capture capabilities, such as magnets, coils, and bulks, to reduce the leakage flux of the machine [11]. Compared to the HTS machines excited by rotor, the HTS bulk of AC brushless machine excited by stator is located on the stator, and its cooling system is relatively simple, thus improving the reliability of HTS bulks cooling [12].…”

Section: Introductionmentioning

confidence: 99%

Multi-objective Optimization of a Multi-tooth Flux-switching Permanent Magnet Machine with HTS Bulks

Ran,

Liu,

et al. 2024

PIER C

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Flux-switching permanent magnet (FSPM) machine has wide application prospects in aerospace and automotive fields. To enhance the machine's electromagnetic performance, a novel multi-tooth flux-switching permanent magnet (MT-FSPM) machine with high-temperature superconducting (HTS) bulks is proposed. The HTS bulks are arranged in the middle of the stator teeth aimed at diminishing flux leakage and amplifying torque output. The method of stator tooth chamfering and rotor flange is adopted to effectively suppress the torque ripple. Then based on the comprehensive sensitivity analysis, the key design parameters of the machine are layered, and the high sensitivity parameters are optimized by response surface method (RSM) and multi-objective genetic algorithm (MOGA) to obtain the optimal value. Finally, a 6/19 MT-FSPM machine model is established in 2D finite element method (FEM). Comparative analysis with the conventional model indicates a 16.4% increase in output torque and an impressive 796% reduction in torque ripple for the proposed model.

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“…Compared with the traditional approach of using rotating motors and mechanical structures for linear motion control, the structure of directly driving linear motors has a more compact mechanical structure and is more suitable for the high dynamic performance requirements of motion control. Linear motors have been widely applied in various fields, such as transportation [1,2], high-precision positioning platforms [3,4], and electromagnetic launch systems [5,6], etc.…”

Section: Introductionmentioning

confidence: 99%

Toward Reducing Undesired Rotation Torque in Maglev Permanent Magnet Synchronous Linear Motor

Xing,

Song,

Gao

et al. 2023

Energies

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The dq current transformation method can be used to achieve the drive control of the maglev permanent magnet synchronous linear motor (MPMSLM). Specifically, the control of the suspension force Fz can be achieved by controlling the d-axis current, and the control of the thrust force Fx can be achieved by controlling the q-axis current. However, the direct use of the dq current transformation method on traditional MPMSLM structures produces an additional rotation torque around the y-axis. In order to reduce this additional torque, a new MPMSLM structure is proposed in this work. First, the characteristics of additional torque through finite element analysis are analyzed. Second, the Halbach permanent magnet array and coil size are optimized, and the topology of the MPMSLM coil is designed to reduce the additional torque. The decoupling performance and current of the proposed MPMSLM are experimentally verified through open-loop experiments using finite element simulation software. Finally, the decoupling algorithm of the generalized inverse matrix is used to achieve the decoupling between forces Fx and Fz and torque Ty and the d-axis and q-axis currents in each drive unit. Based on this, a three-degree-of-freedom closed-loop control system of the MPMSLM is designed. The LabVIEW 2018 software is used for the simulation analysis of the three-degree-of-freedom MPMSLM motion control system, and the results show that the proposed motor structure has superior closed-loop control performance.

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Comparative Investigation of High Temperature Superconducting Linear Flux-Switching Motor and High Temperature Superconducting Linear Switched Reluctance Motor for Urban Railway Transit

Cited by 10 publications

References 15 publications

Reducing Force Ripples and Enhancing Reliability in LSRMs Through Modern Structure and Advanced Control Systems

Reducing Force Ripples and Enhancing Reliability in LSRMs Through Modern Structure and Advanced Control Systems

Multi-objective Optimization of a Multi-tooth Flux-switching Permanent Magnet Machine with HTS Bulks

Toward Reducing Undesired Rotation Torque in Maglev Permanent Magnet Synchronous Linear Motor

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