Akademik Veri Yönetim Sistemi
Moses A. J.(Yürütücü), Derebaşı N.
Diğer Ülkelerden Üniversiteler Tarafından Desteklenmiş Proje, 1998 - 2001
Toroidal wound
cores from strip magnetic materials particularly grain-oriented 3%SiFe are
widely using in many applications. The most common type is the wound strip
toroid, which comprises a narrow strip of electrical steel wound as a tight
circular spiral with a rectangular cross section. They are often preferred to laminated
cores, as they require little processing after winding. The steel strip is
wound, annealed to remove winding stresses, insulated and finally the required
electrical windings are wound around the toroid. Although the method of
assembly is basically very simple variation in magnetic performance can arise
if progressing parameters, such as slitting, strip winding, annealing and
insulation are not properly controlled.
The factor, which is traditionally
of greatest importance in the performance of toroids, is the magnetising
current, which is determined by the magnetic field required to reach a special
flux density. The apparent power is related to this but the real power or iron
loss of the toroid is also important for many applications. In the toroid the
material operates under better condition. The flux is mainly directed along its
rolling direction, there are no corners, no air gaps exist, good annealing can
eliminate harmful stress effects and good core winding gives a high stacking
factor. These factors contribute to the low loss and high permeability of
toroids, which combined with low noise, and low construction costs give them
wide applications.