Title :
A new current sensor based on the measurement of the apparent coercive field strength
Author :
Son, Derac ; Sievert, Johannes D.
Author_Institution :
Physikalisch-Tech. Bundenstalt, Braunschweig, West Germany
fDate :
12/1/1989 12:00:00 AM
Abstract :
A current sensor that uses the change of the apparent coercive field strength caused by the current to be measured is introduced. The apparent coercive field strength is derived from the magnetizing current by detecting the zero crossing points of the average magnetic flux of a core pair. The current is periodically measured at a frequency which is the same as that of the magnetizing current of the sensor. The current sensor shows a standard deviation of the nonlinearity of less than 0.002%, and can measure transient current signals with an 80-kHz sampling rate
Keywords :
coercive force; electric current measurement; electric sensing devices; magnetic field measurement; 80 kHz; 80-kHz sampling rate; apparent coercive field strength; average magnetic flux; current sensor; magnetizing current; nonlinearity; transient current signals; zero crossing points; Current measurement; Frequency measurement; Instrument transformers; Magnetic cores; Magnetic field measurement; Magnetic flux; Magnetic hysteresis; Magnetic sensors; Power system harmonics; Power system transients;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Conference_Location :
12/1/1989 12:00:00 AM
