In figure, a magnetic flux of F is generated with a constant current of i The core material used has a relative permeability of 2000. Assuming that the mean cross sectional area that the magnetic flux passing through in core and "part B" is A4 [cm-Jand there is a fringing of 5% in air gaps, N= 400 [turns] and i= 20 [A], • what is the reluctance of the core? • what is the reluctance in each air gap? • what is the equivalent reluctance of the magnetic circuit? • what are the magnetic flux through the core and the magnetic flux density through each air gap? • what is the force generated on "part B" in each air gap?
Ampere Circuital Law
Ampere's Law states that "for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop.”
Current Density
To design the electrical and electronic system, the current density is an important factor. The designer current level is the factor on which the circuit performance depends and with the help of the dimensions of the conducting current the current density is then determined. For instance, despite the lower current demanded by smaller devices as integrated circuits are reduced in size, there is a type of trend in achieving the higher device number in even smaller chip areas. The current density is increased in this region at higher frequencies because the conducting region in a wire becomes confined and this is known as the skin effect. The consequences increase as the current densities become higher.
Step by step
Solved in 4 steps with 1 images