The review makes a brief overview of traditional methods of measurement of electric current
and shows in more detail relatively new types of current sensors. These include Hall sensors
with field concentrators, AMR current sensors, magneto-optical and superconducting current
sensors. The influence of the magnetic core properties on the error of the current transformer
shows why nanocrystalline materials are so advantageous for this application. Built-in CMOS
current sensors are important tools for monitoring the health of integrated circuits. Of special
industrial value are current clamps which can be installed without breaking the measured
conductor. Parameters of current sensors are also discussed, including geometrical selectivity.
This parameter specific for current sensors means the ability to suppress the influence of
currents external to the sensor (including the position of the return conductor) and also
suppress the influence on the position of the measured conductor with respect to the current
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Keywords: Hall current sensor, current transformer, AMR current sensor, current shunt,
The review makes a brief overview of traditional methods of measurement of electric current 6 K. D" c! I! x. _& m% Xand shows in more detail relatively new types of current sensors. These include Hall sensors5 A4 J% s1 T& i) b# n, J) n
with field concentrators, AMR current sensors, magneto-optical and superconducting current+ L. }7 V2 F" _) r
sensors. The influence of the magnetic core properties on the error of the current transformer 2 J2 g2 c% Z0 l7 a1 eshows why nanocrystalline materials are so advantageous for this application. Built-in CMOS : P6 ]; r4 |1 A$ |; Lcurrent sensors are important tools for monitoring the health of integrated circuits. Of special, u4 i" f7 w; q( X& u* E* x; i* u
industrial value are current clamps which can be installed without breaking the measured 1 V a2 u; H9 b2 J6 |8 Gconductor. Parameters of current sensors are also discussed, including geometrical selectivity. 0 @& d) x# D; C% {$ i5 v( PThis parameter specific for current sensors means the ability to suppress the influence of * k0 Y. h7 Z3 z/ u$ j& o$ W: S! wcurrents external to the sensor (including the position of the return conductor) and also( `. ?4 O! d. ?; ?$ U$ [
suppress the influence on the position of the measured conductor with respect to the current
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发表于 2010-12-23 14:05:18
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