Title :
High frequency planar transformer with helical winding structure
Author :
Wong, Fu ; Lu, Junwei
Author_Institution :
Sch. of Microelectron. Eng., Griffith Univ., Brisbane, Qld., Australia
fDate :
9/1/2000 12:00:00 AM
Abstract :
A high frequency planar transformer with helical windings is proposed. This transformer combines the advantages of the planar magnetic core transformer and air core transformer. The experimental results show that the input impedance and the voltage ratio of this new transformer are much higher than its air core counterpart. The numerical result shows that the flux is evenly distributed and totally enclosed inside the planar ferrite. The electromagnetic interference (EMI), generated from the windings of transformer, is significantly reduced by using magnetic ferrite cores
Keywords :
eddy currents; electric impedance; electromagnetic interference; ferrite devices; high-frequency transformers; magnetic flux; transformer cores; transformer windings; 500 kHz to 2 MHz; EMI; air core transformer; eddy current analysis; electromagnetic interference; helical windings; high frequency planar transformer; input impedance; magnetic ferrite cores; magnetic flux; planar ferrite; planar magnetic core transformer; voltage ratio; Costs; Eddy currents; Electromagnetic interference; Ferrites; Frequency; Impedance; Magnetic cores; Magnetic flux; Magnetic separation; Transformer cores;
Journal_Title :
Magnetics, IEEE Transactions on
