Thrust Ripple Suppression Based on Negative Current Control for Short-Primary Low-Speed Large LIM Under Transient Operation

Sun, Xingfa; Jin, Xu; Zhu, Jihong; Xu, Wei

doi:10.1109/tec.2023.3241166

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…Thus, improvements to traditional three-phase voltage sources are necessary to eliminate thrust ripples. One proposed enhancement involves injecting negative sequence voltage harmonics [17][18][19]. However, this method faces difficulties in practical engineering applications due to This study focuses on analyzing the thrust ripples of LIMs based on a mathematical model, where the parameters can be obtained through experimental measurements.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, improvements to traditional three-phase voltage sources are necessary to eliminate thrust ripples. One proposed enhancement involves injecting negative sequence voltage harmonics [17][18][19]. However, this method faces difficulties in practical engineering applications Electronics 2024, 13, 1247 3 of 21 due to complex calculations and the need to parallel two power sources, which is detrimental to the stability of the control system.…”

Section: Introductionmentioning

confidence: 99%

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Control Strategies of Thrust Ripple Suppression for Electromagnetic Microgravity Facility

Li,

Dong,

et al. 2024

Electronics

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This paper presents an innovative solution that is able to suppress the thrust ripple in a high-power asynchronous linear induction motor (LIM) used in a microgravity experiment facility electromagnetic launch (MEFEL) system. By addressing the crucial need for low levels of thrust ripple in MEFEL applications, we propose a dynamic model-based adaptive controller (MAC) and an enhanced quasi-proportional-resonant (PR) controller. The MAC is designed to compensate for the inherent impedance asymmetry of the linear motor. The PR controller minimizes thrust ripple by eliminating harmonics within the current loop. A comparative analysis indicates that both MAC and PR control are effective in reducing harmonics, suppressing the thrust ripple, and maintaining system stability. Computer simulations show a noteworthy 75% reduction in the thrust ripple and a decrease in the negative current. Partial tests on the MEFEL device validate the practical efficacy of the proposed control methods, emphasizing the method’s ability to enhance the quality of microgravity in real-world scenarios significantly.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Thus, improvements to traditional three-phase voltage sources are necessary to eliminate thrust ripples. One proposed enhancement involves injecting negative sequence voltage harmonics [17][18][19]. However, this method faces difficulties in practical engineering applications Electronics 2024, 13, 1247 3 of 21 due to complex calculations and the need to parallel two power sources, which is detrimental to the stability of the control system.…”

Section: Introductionmentioning

confidence: 99%

Control Strategies of Thrust Ripple Suppression for Electromagnetic Microgravity Facility

Li,

Dong,

et al. 2024

Electronics

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Analysis of the traction forces of two adjacent linear induction motors

Zhang,

Luo,

Liu

et al. 2024

Sci Rep

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Linear induction motors (LIMs) are positioned head-to-tail in medium and low-speed maglev (MLSM) trains, and the interaction due to small spacing between two LIMs is not yet clear. In this work, based on the 2D electromagnetic field theory, the vector magnetic potential (VMP) of each region was solved, and the traction forces of two adjacent LIMs were derived. Subsequently, the correctness of the theoretical model was verified by simulation. Finally, the effects of the spacing, wiring type, pole pitch, speed, etc., on the traction forces of two adjacent LIMs were analyzed. The results show that the traction force of LIM1 (arranged in front) is almost unaffected by LIM2 (arranged behind LIM1), while that of LIM2 fluctuates periodically with the spacing, and the smaller the spacing, the greater the fluctuation amplitude. Meanwhile, the larger the pole pitch, the more the pole number, the greater the slip frequency, and the lower the speed, the smaller the effect of LIM1 on LIM2. When the spacing takes 1.1 to 1.6 times the pole pitch, the traction force of LIM2 is larger than that of LIM1. The achievements can provide technical support for enhancing the traction performance of the LIMs in the MLSM trains.

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Six-Phase Induction Machines: State of the Art on Design, Modeling, Control and Diagnosis

Taherzadeh,

Hénao,

Capolino

2024

2024 International Conference on Electrical Machines (ICEM)

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Thrust Ripple Suppression Based on Negative Current Control for Short-Primary Low-Speed Large LIM Under Transient Operation

Cited by 4 publications

References 23 publications

Control Strategies of Thrust Ripple Suppression for Electromagnetic Microgravity Facility

Control Strategies of Thrust Ripple Suppression for Electromagnetic Microgravity Facility

Analysis of the traction forces of two adjacent linear induction motors

Six-Phase Induction Machines: State of the Art on Design, Modeling, Control and Diagnosis

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