Results 181 to 190 of about 969 (214)
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Analysis of eddy-current brakes for high speed railway
IEEE Transactions on Magnetics, 1998The analysis of eddy-current brakes for a high-speed railway is described that shows the operational characteristics of the brake as function of the train speed up to 300 km/hr and of the DC magnetizing current of magnetic poles. Braking forces are generated by employing a DC excitation field for the poles moving 7 mm above the rails.
null Pei-Jen Wang +1 more
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Research on Braking Characteristics of Rail Eddy Current Brake with AC Excitation
2021 13th International Symposium on Linear Drives for Industry Applications (LDIA), 2021This paper describes an eddy current brake (ECB) device consisting of AC excitation and ferromagnetic railway. The braking force can be generated with non-contact and low noise caused by the reaction between the eddy current and excitation current. In this paper, the structure of the brake is introduced detailedly.
Yongzeng Li +5 more
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Eddy current brake with two pole pairs
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2009PurposeThe purpose of this paper is to derive a force‐velocity characteristic for an eddy current brake with minor computational effort.Design/methodology/approachThe speed range is split into two domains. While in the low‐speed domain it is possible to achieve a closed form expression for the force‐velocity characteristic in the high‐speed region ...
Eckhard Baum, Stefan Eberhardt
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An analytical dynamic model of eddy-current brakes
IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485), 2002This paper examines eddy-current brakes. Our aim is to model the brake and estimate its braking power. We focused on a static model, in which the flux density distribution on the eddy current surface was calculated using finite element methods. Next, we derived a dynamic model whose eddy currents were computed by means of an analytical expression.
A. Lesobre, A.H.B. Ahmedl, D. Drecq
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Investigation on Eddy Current Braking Systems – A Review
Applied Mechanics and Materials, 2014The changing magnetic field will induce eddy currents in the conductor. These currents will dissipate energy in the conductor and generate drag force. It is found that Aluminium is the best material as conductor compared to Copper and Zinc. Also, it is found that the larger thickness of disc, more number of turns of electromagnet and higher electrical ...
G.L. Anantha Krishna, K.M. Sathish Kumar
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Magnetic flux distribution and braking torque of a grooved eddy current brake
2020 2nd International Conference on Computer and Information Sciences (ICCIS), 2020Motorcycles generally require an optimal braking system, eddy current brake (ECB) can be used as an alternative to conventional braking systems. Design unipolar axial ECB with an electromagnet used in this research. ECB performance can be influenced by some factor, one of them is changing the form of the surface of a conductor.
U Ubaidillah +4 more
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Eddy Current Brake Control for Test Cycles Simulation
Design, Application, Performance and Emissions of Modern Internal Combustion Engine Systems and Components, 2003On-vehicle (rolls dynamometer or road) tests are usually more expensive and time-consuming than test bench ones. Furthermore, sometimes results would be useful during vehicles design phase. The paper aim is to present a methodology that allows simulating the vehicle on an engine test cell, by properly controlling the bench actuators.
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Analysis of eddy-current brakes with nonmagnetic rotors
Proceedings of the Institution of Electrical Engineers, 1977The field distribution when a thin conducting sheet moves with constant velocity between two rectangular and infinitely permeable pole pieces of an electromagnet is obtained by conformal mapping, after reduction of the problem to two dimensions. This result is used in predicting the force/speed and flux/speed characteristics of eddy-current brakes with
K. Venkataratnam, D. Ramachandra Raju
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Linear eddy current brake for railway vehicles using dynamic braking
2008 18th International Conference on Electrical Machines, 2008One type of braking system for railway vehicles is the eddy current brake. Because this type of brake has the problem of rail heating, it has not been put to practical use in Japan. Therefore we proposed using a linear induction motor (LIM) for dynamic braking in eddy current brake systems.
Yasuaki Sakamoto +3 more
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Finite element models of eddy current brakes
Proceedings of CEM 2002 - 4th International Conference on Computation in Electromagnetics, 2002Permanent magnet eddy current brakes offer an economic method for bringing a moving object to rest. The performance of a decelerating eddy current brake can be modelled by a time transient finite element scheme. However, this may be time consuming, especially in the early stages of design. It is shown here how an adequate simulation is possible using a
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