Analysis of an eddy current brake for an actuator of a high‐voltage direct current circuit breaker

Sim, Minseob; Ro, Jong‐Suk

doi:10.1049/iet-epa.2019.0002

Cited by 5 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the ECBS is in three dimensional, as the electromagnets move linearly along the rail, the eddy current thus mainly distributes in the plane that is parallel to the rail. Then, the problem can be solved using 3D FEM, or can be treated as a 2D model in which the eddy current path is fixed in one direction [22][23][24].…”

Section: Ecbs Of the Maglev Trainmentioning

confidence: 99%

Analysis of linear eddy current brakes for maglev train using an equivalent circuit method

Liu

Jin

et al. 2021

IET Electrical Systems in Transportation

View full text Add to dashboard Cite

An equivalent circuit method (ECM) is developed to analyse the linear eddy current braking system (ECBS) of the maglev train. The distribution of eddy current in the rail is represented by dividing the rail into a series of small segments in which the current is assumed to be uniform. Each segment is described as an equivalent circuit with parameters of resistance and inductance. The circuit parameters, such as self-inductance and mutual inductance, are evaluated from the geometry parameters using an analytic method. The state equation derived from the circuit equations and the Newton's equations is solved using the Runge-Kutta method, from which the dynamic performance of the linear ECBS can be obtained. The accuracy and efficiency of the proposed ECM are verified by comparing the results with the one obtained from the finite element method. By adopting the developed ECM, the influence of parameters, such as speed, the exciting current and air gap of the linear ECBS, are analysed. The variation law of the linear ECBS with parameters is roughly grasped.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Ecbs Of the Maglev Trainmentioning

confidence: 99%

Analysis of linear eddy current brakes for maglev train using an equivalent circuit method

Liu

Jin

et al. 2021

IET Electrical Systems in Transportation

View full text Add to dashboard Cite

show abstract

“…For 24 slots, i.e., q = 1, there are high slot harmonics in the fifth and seventh harmonics. Therefore, we employed 48 slots, i.e., q = 2 [20][21][22][23].…”

Section: Step 32 Pole-slot Number Selectionmentioning

confidence: 99%

Analysis and Design of a High-Performance Traction Motor for Heavy-Duty Vehicles

Lee

2020

Energies

View full text Add to dashboard Cite

Due to environmental issues and depletion of resources, global attentiveness in electric vehicles (EVs) is growing. In particular, research on high specification motors for driving large EVs has attracted a lot of attention. In this study, an analysis and design process for a motor that can be universally applied in heavy vehicles to reduce environmental pollution was introduced. Motors for driving heavy vehicles require high specifications. Thus, an interior permanent magnet synchronous motor (IPMSM) with a delta-shaped magnet array was used to improve the torque and power characteristics. A step skew rotor structure was also used to dampen vibration and noise by minimizing the high-order harmonics in the cogging torque. The proposed analysis and design approach also reduces the total harmonic distortion (THD) of the back electromotive force (EMF). The effectiveness of the proposed analysis and design process and the usefulness of the resulting high-performance traction motor for heavy-duty vehicles were verified via the finite element method (FEM) and by experiment.

show abstract

Analysis and Design of Novel High Speed Permanent Magnet Machine Considering Magnet Eddy Current Loss

Khan

Ahmad

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In high speed permanent magnet (HSPM) machines, the computation of magnet eddy current loss is essential as these losses significantly affect the temperature of the permanent magnet (PM) and electromagnetic performance and can result in irreversible demagnetization of the PM. Several techniques have been adopted to minimize the eddy current loss of the PM; however, superior performance has not been achieved yet. In this paper, the design characteristics of the HSPM machine are analyzed. The PM is covered by a titanium sleeve to retain the PM on the rotor and to further reduce the eddy current loss of the magnet. The undesirable harmonics of the airgap flux density are minimized, which reduces the eddy current loss in the solid PM and rotor. Two existing models, with and without auxiliary slots, are examined and compared with the proposed design having a titanium-based retaining sleeve. The analysis reveals that the eddy-current loss, cogging torque, and iron losses of the PM are reduced by 82%, 73%, and 44.7%, respectively, in the proposed model; however, a marginal increase is observed in the average rated torque profile and open circuit flux linkage.INDEX TERMS Auxiliary slot, eddy current losses, finite element analysis, high speed machine, iron loss, permanent magnet, sleeve, spatial harmonics.

show abstract

Analysis of an eddy current brake for an actuator of a high‐voltage direct current circuit breaker

Cited by 5 publications

References 16 publications

Analysis of linear eddy current brakes for maglev train using an equivalent circuit method

Analysis of linear eddy current brakes for maglev train using an equivalent circuit method

Analysis and Design of a High-Performance Traction Motor for Heavy-Duty Vehicles

Analysis and Design of Novel High Speed Permanent Magnet Machine Considering Magnet Eddy Current Loss

Contact Info

Product

Resources

About