Electromagnetic fields related to high speed transportation systems

Kircher, Roland; Klühspies, Johannes; Pałka, Ryszard; Fritz, Eckert; Kenji, Eiler; Witt, Michael

doi:10.17816/transsyst201842152-166

Cited by 17 publications

(9 citation statements)

References 1 publication

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“…1) Accelerate the vehicle to reach the desired cruising speed (≥1000 km/h); 2) Ability to brake or de-accelerate the vehicle from the service speed (≥1000 km/h). A performance benefit is regenerating of the capsule's kinetic energy; 3) Sustain the target speed between the acceleration and de-acceleration zones combating drag forces; 4) Safe magnetic field levels and comfort in the passenger compartment [66].…”

Section: Hyperloop Propulsion Technologiesmentioning

confidence: 99%

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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Section: Hyperloop Propulsion Technologiesmentioning

confidence: 99%

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

Nøland

2021

IEEE Access

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“…High flux density and high thrust can be produced over a wide gap range because of extremely high ampere turns (see Section 4.5). Some general problems connected with the electromagnetic fields related to highspeed LTSs driven by different linear motors (synchronous, induction, superconducting) were described in [27].…”

Section: Lts With Superconducting Induction Motorsmentioning

confidence: 99%

“…Some general problems connected with the electromagnetic fields rela speed LTSs driven by different linear motors (synchronous, induction, super were described in [27].…”

Section: Linear Transportation Systems Using Induction Motorsmentioning

confidence: 99%

Linear Induction Motors in Transportation Systems

Pałka

Woronowicz

2021

Energies

Self Cite

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This paper provides an overview of the Linear Transportation System (LTS) and focuses on the application of a Linear Induction Motor (LIM) as a major constituent of LTS propulsion. Due to their physical characteristics, linear induction motors introduce many physical phenomena and design constraints that do not occur in the application of the rotary motor equivalent. The efficiency of the LIM is lower than that of the equivalent rotary machine, but, when the motors are compared as integrated constituents of the broader transportation system, the rotary motor’s efficiency advantage diminishes entirely. Against this background, several solutions to the problems still existing in the application of traction linear induction motors are presented based on the scientific research of the authors. Thus, solutions to the following problems are presented here: (a) development of new analytical solutions and finite element methods for LIM evaluation; (b) comparison between the analytical and numerical results, performed with commercial and self-developed software, showing an exceptionally good agreement; (c) self-developed LIM adaptive control methods; (d) LIM performance under voltage supply (non-symmetrical phase current values); (e) method for the power loss evaluation in the LIM reaction rail and the temperature rise prediction method of a traction LIM; and (f) discussion of the performance of the superconducting LIM. The addressed research topics have been chosen for their practical impact on the advancement of a LIM as the preferred urban transport propulsion motor.

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“…EMS conditions are determined by the levels of EMF strengths [11][12][13][14][15][16][17][18][19][20][21], which are usually calculated at a standard height of 1.8 m [22]. To determine the strengths at the intersection points of OPL and TN, the algorithm [17] is used, which includes the phases shown in fig.…”

Section: Computer Models For Analyzing Ems Conditions At the Intersecmentioning

confidence: 99%

Computer models in problems of ensuring electromagnetic safety

et al. 2020

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In the process of the smart grids formation a special attention is started to be paid to the issues of power engineering facilities safe functioning and reduction in their negative impact on personnel and environment. One of the important factors of such an impact is the generation of significant levels of strength of electromagnetic fields (EMF) by high-voltage overhead power transmission lines (OPL). In the context of the electric power industry digitalization, in order to improve the electromagnetic safety of service personnel, development of methods and means for digital modeling of EMF created by power lines of various designs is required, including traction networks of electrified railways. Computer models providing an adequate determination of the OPL EMF can be implemented on the basis of methods and tools designed for determining the parameters of the modes of electric energy systems in phase coordinates, developed at the Irkutsk State University for Railroads Communications. As an example of using these methods, the solution to the problem of constructing pictures of the distribution of EMF in the space surrounding the intersection of a flexible symmetrical conductor and a 25 kV traction network is given.

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Electromagnetic fields related to high speed transportation systems

Cited by 17 publications

References 1 publication

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

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

Linear Induction Motors in Transportation Systems

Computer models in problems of ensuring electromagnetic safety

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