Title :
An efficient digital controller for active shielding circuits
Author :
Antonini, G. ; Cristina, S.
Author_Institution :
Dipt. di Ingegneria Elettrica, L´´Aquila Univ., Italy
Abstract :
Active shielding has been previously considered as an effective means for the attenuation of extremely low frequency magnetic fields. In the present paper an effective (digital) discrete time controller for active shields is presented pointing out its capability to drive active circuits in order to generate a magnetic field with the same amplitude as the incident one but oppositely directed. The digital controller is tested with several magnetic field waveforms showing very good tracking capabilities due to its wide bandwidth. Finally the proposed discrete time controller is used to drive an active circuit to reduce the low frequency magnetic shield radiated by the power section of an electronic system
Keywords :
active networks; controllers; digital control; discrete time systems; magnetic shielding; active circuits; active shielding circuit; attenuation; efficient digital controller; extremely low frequency magnetic fields; magnetic field waveforms; power section; tracking capabilities; Active circuits; Bandwidth; Digital control; Drives; Frequency; Magnetic circuits; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetic shielding;
Conference_Titel :
Electromagnetic Compatibility, 2000. IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-5677-2
DOI :
10.1109/ISEMC.2000.875536
