New current transformer device based on non-magnetostrictive amorphous ribbons

摘要

The design of a sensitive current transformer is presented in this work. Such a device is based in the detection of an induced voltage in toroidal pick-up coil wound around a high permeability nucleus, when an ac electrical current (frequency: 50 Hz) flows through a conducta wire coaxial with its axis. In the present device, the use of a nearly zero magnetostrictive amorphous ribbon (Co{sub}71.3Fe{sub}3.7Si{sub}15B{sub}10 as the ferromagnetic nucleus, is analyzed and compared with the sensor response employing a Fe-based highly magnetostrictive amorphous ribbon (Fe{sub}73.5Si{sub}13.5 B{sub}9Cu{sub}1Nb{sub}3). The performed analysis has allowed us to develop a final prototype with similar accuracy than the commercial Hall clamp meter devices.