Title :
A low loss transformer using a rotating magnetic field
Author :
Nakata, T. ; Takahashi, N. ; Fujiwara, K. ; Nakano, M. ; Nagao, M.
Author_Institution :
Dept. of Electr. Eng., Okayama Univ., Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
A type of transformer with reduced iron loss, which is excited by a semirotating magnetic field, has been investigated. Factors (method of excitation and slits in the core) affecting iron losses are examined. The iron loss of this type of transformer can be reduced below the material loss as measured for normal AC excitation by introducing a slit which cuts the eddy current path, and by improving the method of excitation
Keywords :
eddy current losses; magnetic leakage; transformers; AC excitation; AC poloidal excitation; AC toroidal excitation; DC poloidal excitation; DC toroidal excitation; core slits; eddy current path; iron loss; low loss transformer; rotating magnetic field; Circuit faults; Eddy currents; Iron; Magnetic cores; Magnetic field measurement; Magnetic fields; Power transformer insulation; Steel; Toroidal magnetic fields; Transformer cores;
Journal_Title :
Magnetics, IEEE Transactions on
