Abstract
Evaluation of brake parameters in copper discs of various thicknesses and speeds using Neodymium – Iron – Boron Magnets
Highlights
Conventional friction brakes have numerous problems such as brake squealing noise [1 – 10], thermal cracking and thermo mechanical failures [11 – 15], fade and recovery behavior of friction material [16 – 17], effects due to formulation of ingredients of materials of brake lining [18 – 23], brake judder [24 – 25], brake grabbing, disc distortion etc.The eddy current principle states that a non – stationary magnetic field induces swirl like electric currents in a conductive body subjected to its influence
Because of higher % of speed reduction, higher deceleration and less time taken for speed reduction, 4 mm thick disc may be more suitable for high speed automotive applications in single magnet with sudden application condition
4 mm thick disc in single magnet condition may be more suitable for high speed train applications
Summary
The eddy current principle states that a non – stationary magnetic field induces swirl like electric currents in a conductive body subjected to its influence. These eddy currents occur either when a moving conductive body crosses a magnetic field or by imposing a varying magnetic field upon a stationary conductor. The eddy currents generate a magnetic field whose flux is opposite to the applied one, in an attempt to reduce the net magnetic flux to zero. This magnetic interaction generates the force necessary to cause a deceleration of the conductor body. Braking torque is directly proportional to the speed of the moving conductor
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