Results 191 to 200 of about 12,948 (226)

Finite element models of eddy current brakes

Proceedings of CEM 2002 - 4th International Conference on Computation in Electromagnetics, 2002
Permanent 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
openaire   +1 more source

An analytical dynamic model of eddy-current brakes

IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485), 2002
This 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
openaire   +1 more source

Braking force characteristics of permanent magnet eddy current brake with high acceleration

International Journal of Applied Electromagnetics and Mechanics, 2020
This paper investigates the braking force characteristic of permanent magnet eddy current brake with high acceleration. Compared with the braking force characteristics under quasi-static condition, the braking force considering the effect of high acceleration lags behind the quasi-static braking force before and after the critical speed.
Li, Jiahao, Yang, Guolai, Fan, Yumeng
openaire   +1 more source

Modeling and control of an eddy current brake

Control Engineering Practice, 1996
The purpose of this paper is the application of some existing techniques for the modelling and regulation of an eddy current brake process. An approximate theoretical model is derived for the behavior of an eddy current disc brake in the low-speed zone.
Simeu, Emmanuel, Georges, D.
openaire   +1 more source

An eddy-current braking crane-hoist controller with variable brake excitation

Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry, 1955
An a-c crane-hoist controller for a wound-rotor induction motor and an eddy-current brake is described. The brake serves as an artificial load for the motor. Emphasis is placed on the desirability of using speed-responsive excitation for the brake to cause its torque to increase so rapidly with speed that flat speed-load characteristics are obtained. A
openaire   +1 more source

General theory of eddy-current couplings and brakes

Proceedings of the Institution of Electrical Engineers, 1966
The general steady-state theory of eddy-current coupling is extended and new material included. The differences in operation between salient-pole and inductor-type eddy-current couplings are shown and the limitations of inductor couplings emphasised. The peak torque of the inductor coupling is shown to be roughly half that of the Lundell machine and to
openaire   +1 more source

Eddy Current Brake Control for Test Cycles Simulation

Design, Application, Performance and Emissions of Modern Internal Combustion Engine Systems and Components, 2003
On-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.
openaire   +1 more source

The study on the measuring method of the eddy current on the eddy current brake

9th International Conference on Electrical Machines and Drives, 1999
It is important to analyse the characteristic of the flux density and eddy current on the inner part of the electric machine in order to raise the efficiency of the machine. In general, characteristics of the machines are investigated using the numerical analysis.
openaire   +1 more source

Eddy current brakes (in german)

Wear, 1971
openaire   +1 more source

High-speed inspection of delamination defects in unidirectional CFRP by non-contact eddy current testing

Composites Part B: Engineering, 2021
Miguel Araújo Machado, Kim-Niklas Antin, Pedro Vilaça   +2 more
exaly