Simulation of the Braking Effects of Permanent Magnet Eddy Current Brake and Its Effects on Levitation Characteristics of HTS Maglev Vehicles

Zhang, Gaowei; Zhu, Jun; Li, Yan; Yuan, Yuhang; Xiang, Yuqing; Lin, Pang; Wang, Li; Liu, Jianxin; Liang, Le; Deng, Zigang

doi:10.3390/act11100295

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…According to Equations ( 7) and (8), it is very difficult to directly calculate the negative entropy of the signal, and the approximate estimate of negative entropy proposed by Hyvärinen can be quickly calculated in practical applications:…”

Section: Et H Te T Et Nt Et H Te Tetnt Et H Te Tetntmentioning

confidence: 99%

“…Based on multichannel/asynchronous measurement and advanced signal processing technology, Xing Lu [7] proposed a field measurement method for the electromagnetic environment of a magnetic levitation system based on blind source separation. Zhang, H et al used Maxwell EM to construct a three-dimensional electromagnetic environment simulation model of maglev trains and simulated and predicted the electromagnetic radiation characteristics of the maglev train system [8] . Most of the existing literature is mainly about the research of linear motors, which are the main emission sources, including the working principle, magnetic field leakage, numerical calculations, etc [9][10] .…”

Section: Introductionmentioning

confidence: 99%

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Method of field measurement of electromagnetic environment of high speed maglev train

Li,

Zhang,

et al. 2024

J. Phys.: Conf. Ser.

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In order to reduce the complexity of the magnetic field test of maglev trains and improve the accuracy of measurement data, this paper proposes a field measurement method of maglev train radiation emission based on high-speed parallel adaptive filter denoising technology. This measurement method is not limited by special measurement sites, and has the characteristics of high-speed measurement, real-time data processing, and large-capacity data storage. It breaks through the technical bottleneck of the traditional measurement system. The electromagnetic radiation emission of high-speed maglev trains is measured in real-time through multi-antenna synchronous measurement technology, and multi-channel high-speed RF signal measurement and acquisition of external signals are further carried out by blind source separation technology, environmental pre-scanning is carried out, environmental interference characteristics are obtained through feature statistics, and the radiation signal to be measured is estimated by blind source separation algorithm. It helps to achieve the purpose of accurately measuring the electromagnetic radiation emission of high-speed maglev trains. Through field testing, the denoising performance of the method reached 20 dB. Through field testing, the denoising performance of the method reached 20 dB.

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Section: Et H Te T Et Nt Et H Te Tetnt Et H Te Tetntmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Method of field measurement of electromagnetic environment of high speed maglev train

Li,

Zhang,

et al. 2024

J. Phys.: Conf. Ser.

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“…Putting the cushion design parameters δ ¼ 1:5, β ¼ 0:025, P in ¼ 10 KPa, and equilibrium gap x ¼ 1:63 mm in equation (15), linearized equivalent stiffness of each cushion is obtained as K a ¼ 360 KN m .…”

Section: The Governing Equations Of Motionmentioning

confidence: 99%

“…14 Zhang et al designed a PM eddy current brake and analyzed its braking effect on the levitation characteristics of an HTS maglev vehicle. 15 Suo et al presented the acceleration and deceleration model of HST using an air gun and magnetic braking devices. 16 Powell and Palacin studied the maximum allowable longitudinal acceleration for keeping passenger stability in moving railway vehicles.…”

Section: Introductionmentioning

confidence: 99%

Vibration analysis of a hyperloop pod with a novel hybrid levitation in accelerating and braking maneuvers

Petoft

Rahi

Fakhari

2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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Hyperloop, a very high-speed transportation system including a pod transporting the passengers in a tube, forms the core debate in numerous recent investigations. The present paper, furthering the current advanced findings, proposes a novel hybrid levitation including Electro-Dynamic Suspension (EDS) and air cushions for the pod in the hyperloop system. It also presents a vibrational model for the hybrid levitation pod to predict the vibration behavior of the pod in accelerating and braking maneuvers. In this regard, an industrial pod is designed conceptually by performing preliminary calculations. Via CFD simulations in Ansys Fluent software, we hold forth a nonlinear dynamic model for the air cushions. Then, the paper analyzes a 3-DOF vibration model of the pod and verifies it by comparing the related results with obtained ones from the MSc ADAMS software. Afterward, the mentioned vibration model is developed into a 7-DOF model to predict the vibration behavior of the pod in accelerating and braking maneuvers. Also, the governing dynamic equations of the system are derived and numerically solved. Finally, the vibration behavior of the pod in different accelerating and braking conditions is investigated.

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Method for Predicting Linear Eddy Current Braking Performance of the High-Speed Maglev Train Based on Magnetic Circuit Structure

Hu,

Chen,

Lin

2024

Transportation Research Record: Journal of the Transportation R

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On high-speed magnetic levitation (maglev) trains, the linear eddy current brake (LECB) is a key piece of equipment to ensure the safety of train operation. In the event of a sudden failure of the traction motor or the external power grid, braking by the LECB, which comes with the maglev train, is currently the only emergency braking method that can ensure the train can be safely stopped while operating at high speed. The braking performance of eddy current brakes is usually predicted based on symmetrical magnetic equivalent circuits, which usually ignore the interactions between the magnetic circuits. For LECB, such interactions should not be neglected. In this paper, to investigate an accurate and efficient method for predicting the braking performance of LECB for high-speed maglev trains, based on the structural characteristics of LECB and Kirchhoff’s law, a full structural magnetic equivalent circuit model considering the interactions between magnetic circuits is developed, and then combined with the subdomain method, a braking force model, to predict the braking performance of LECB. The performance prediction of LECB with different numbers of magnetic poles is compared with the traditional method using the results of the finite element method and the experimental method as references. The results show that the proposed method is more accurate in predicting the braking performance of LECB and better reflects the physical characteristics of the actual magnetic field.

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Simulation of the Braking Effects of Permanent Magnet Eddy Current Brake and Its Effects on Levitation Characteristics of HTS Maglev Vehicles

Cited by 5 publications

References 22 publications

Method of field measurement of electromagnetic environment of high speed maglev train

Method of field measurement of electromagnetic environment of high speed maglev train

Vibration analysis of a hyperloop pod with a novel hybrid levitation in accelerating and braking maneuvers

Method for Predicting Linear Eddy Current Braking Performance of the High-Speed Maglev Train Based on Magnetic Circuit Structure

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