PEMERIKSAAN NDT DENGAN METODE EDDY CURRENT EXAMINATION
The Hazards resulting from failure of an aircraft wheel during landing, or explosion in flight, are self-evident. After a number of accidents regular Non-Destructive Inspection of wheels …Full description
basic
eddy current
PEMERIKSAAN NDT DENGAN METODE EDDY CURRENT EXAMINATIONDeskripsi lengkap
Basic Principles of Eddy Current InspectionFull description
NDT level 3
ConsultaDescripción completa
EDDY CURRENT BRAKES ABSTRACT:
Many of the ordinary brakes, which are being used now days stop the vehicle by means of mechanical blocking. This causes skidding and wear and tear of the vehicle. And if the speed of the vehicle is very high, the brake cannot provide that much high braking force and it will cause problems. These drawbacks of ordinary brakes can be overcome by a simple and effective mechanism of braking system 'The eddy current brake'. It is an abrasion-free method for braking of vehi vehicl cles es incl includ udin ing g trai trains ns.. It make makess use use of the the oppo opposi sing ng tend tenden ency cy of eddy eddy curr curren entt Eddy current is the swirling current produced in a conductor, which is subjected to a change in magnetic field. Because of the tendency of eddy currents to oppose, eddy currents cause energy to be lost. More accurately, eddy currents transform more useful forms of energy such as kinetic energy into heat, which is much less useful. In many applications, the loss of useful energy is not particularly desirable. But there are some practical applications. Such an application is the eddy current brake. EDDY CURRENT BRAKING:
Eddy current brakes are simple magnetic devices that consist of a non-ferromagnetic conductor that moves through a magnetic field. An example is shown in Figure 1 where a magnetic field is created in the gap of a toroidal electromagnet, with diameter D. When the conductive disc rotates, eddy currents are induced at an average distance R from the axis of rotation where the pole’s magnetic field moves as a function of the angular velocity of the disk.1 Power is dissipated in the conductive disk by the Joule Effect, which creates a viscous-like torque applied to the disk. Reference : http://www.seminarprojects.com/Thread-eddy-current-brake-full-report#ixzz0lxyGMtK7