Title :
A design of eddy current controller in electron gun using 3D boundary element method
Author :
Koh, Chang Seop ; Jung, Kwang-sig ; Hahn, Song-Yop
Author_Institution :
Sch. of Electr. & Electron. Eng., Chungbuk Nat. Univ., South Korea
fDate :
7/1/2000 12:00:00 AM
Abstract :
A transient electromagnetic field of the electron gun in a color picture tube is analyzed using the 3D-boundary element method, and the eddy current controller is designed to shield the stray field from the magnetic deflection yoke. The stray field from the deflection yoke, which induces an eddy current on the electron gun and brings about the convergence error on the screen among the red, green and blue beams, is approximated as saw type field and Fourier transformed to be used as an incident field in the analysis. The boundary element formulation is achieved by using the (jw) method. By comparing the shielding effects of the eddy current controller with increasing length of the controller, it is shown that the eddy current controller can be designed optimally
Keywords :
Fourier transforms; boundary-elements methods; eddy currents; electromagnetic fields; electron guns; magnetic shielding; magnetic variables control; 3D boundary element method; 3D-boundary element method; Fourier transformation; boundary element formulation; color picture tube; convergence error; eddy current controller design; electron gun; magnetic deflection yoke; saw type field; shield cup; stray field shielding; transient electromagnetic field; Color; Eddy currents; Electromagnetic analysis; Electromagnetic fields; Electromagnetic transients; Electron tubes; Magnetic analysis; Magnetic shielding; Optimal control; Transient analysis;
Journal_Title :
Magnetics, IEEE Transactions on
