Analysis of electromagnetic forces in a levitated short rotor LIM. I. Finite length and finite width effects

Venkataratnam, K.; Chattopadhyay, Adhir Baran

doi:10.1109/60.986444

Cited by 4 publications

References 7 publications

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Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Nøland

2021

IEEE Access

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The present article outlines the core technologies needed to realize the Hyperloop transportation system (HTS). Currently, the HTS vacuum tube train concept is viewed as the fastest way to cross the earth's surface. However, the concept has not yet been demonstrated for subsonic or near-sonic speeds in large-scale implementations. Among the challenging technical areas are the tube's depressurization, the capsule's air resistance, and choked flows occurring around the capsule. There is also a need for effective levitation and propulsion solutions compatible with the velocities being proposed. Moreover, several conflicting objectives have been identified in the HTS design. It is highlighted that the tubes should be wide enough to lower the capsule's drag forces but that a large-sized tube comes at the expense of higher operational energy costs and infrastructure investments. Another struggle is aiming at a low-cost passive track design and, and at the same time, a lightweight vehicle. One technical path is to turn the whole guideway into an electric propulsor, arriving at a 'lightweight capsule solution' (LCS). Alternatively, the vehicle could be transformed into a 'modified airplane' that stores massive amounts of onboard energy, yielding an energy-autonomous 'low infrastructure solution' (LIS). In a case study, it is shown that even LIS technology is compatible with short-haul flights (1500 km) but that it requires an energy reservoir of about 30 % of the capsule's overall mass. Results and discussions presented in this paper are supported by analytical predictions with parameters or input data either supported by referred simulations or experiments. In general, the paper aims to open up the discussion, provide a sufficient understanding of the Hyperloop field's multidisciplinary aspects, and establish a foundation for further investigations. In the end, new research tasks have been defined, which have the potential to go beyond the state of current knowledge.

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Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Nøland

2021

IEEE Access

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Modeling and Simulation of Field Oriented Controlled Large Air-gap Linear Induction Motor

Wang

Lei

et al. 2006

2007 Chinese Control Conference

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The large air gap linear induction motor (air gap length is greater than 10mm) is well used in metro, light rail now, and also will have a nice future in Low-speed Maglev Vehicle. There are many differences between large air-gap linear induction motor and the small air-gap ones. It is necessary to do some research for the characteristics and driven technique of large air-gap linear induction motor. The paper introduced the DUNCUN equivalent circuit model for linear induction motor. By implementing FEM analysis of one large air-gap linear induction motor, the parameters for the DUNCUN equivalent circuit model were extracted. Then taking dynamic longitudinal end effect of this LIM into consideration, the secondary flux oriented control simulation model of this LIM is developed. Via simulation analysis, some of the key points about field oriented control was discussed. As a result, they can supply some good tips to driven system design of this kind of motor.

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Design and simulation of a magnetic levitated switched reluctance linear actuator system for high precision application

Sun

Cheung

Pan

et al. 2008

2008 IEEE International Symposium on Industrial Electronics

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Analysis of electromagnetic forces in a levitated short rotor LIM. I. Finite length and finite width effects

Cited by 4 publications

References 7 publications

Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Prospects and Challenges of the Hyperloop Transportation System: A Systematic Technology Review

Modeling and Simulation of Field Oriented Controlled Large Air-gap Linear Induction Motor

Design and simulation of a magnetic levitated switched reluctance linear actuator system for high precision application

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