Title :
Effect of eddy current in shielding plate and electron gun on flux distribution in CRT
Author :
Takahashi, Naoyuki ; Shimada, Kenji ; Wakasono, H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Okayama Univ., Japan
Abstract :
Summary form only given. An inner magnetic shield (IMS) is set inside a cathode ray tube (CRT) to reduce the disturbance from outside of the CRT, such as geomagnetism. The eddy current induced in the IMS due to the changing current in the deflection coil may affect the flux distribution in the CRT. The eddy current is also induced in the electron gun when coils for velocity modulation (VM) are set near the gun. Although the effect of the eddy current is important, reports about the analysis of this phenomenon are few. In this paper, the effect of the eddy current in the IMS and electron gun on flux distribution in the CRT is analyzed by using the 3-D finite element method.
Keywords :
cathode-ray tubes; eddy currents; electron guns; finite element analysis; magnetic flux; magnetic shielding; 3D finite element method; CRT; cathode ray tube; changing current; deflection coil; eddy current; electron gun; flux distribution; geomagnetism; inner magnetic shield; shielding plate; velocity modulation; Cathode ray tubes; Coils; Displays; Eddy currents; Electrical equipment industry; Electronics industry; Electrons; Industrial electronics; Magnetic devices; Magnetic flux;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1000734
