Abstract :
The results of the experimental investigation of the error sources of a magnetoresistive active power sensor at the industrial frequency of 60 Hz are presented. The investigation has been carried out at 120 V and 1, 5, and 10 A with the aid of a power calibrator. The current and phase shift in this experiment was held to within 30 ppm and the voltage was held to within 9 ppm, respectively. The main sources of the uncertainties are phase uncertainty of the voltage divider, self-detection of the voltage and current signal, thermoelectricity, nonlinearity of the volt-watt characteristic and the temperature instability. The total uncertainty of the magnetoresistive active power sensor does not exceed 0.2%
Keywords :
magnetic sensors; magnetoresistive devices; measurement errors; measurement uncertainty; power measurement; power meters; 1 A; 10 A; 120 V; 5 A; 60 Hz; analog multiplication; current shift; error source determination; industrial frequencies; magnetoresistive active power sensor; phase shift; phase uncertainty; power calibrator; power measurement; self-detection; temperature instability; uncertainty sources; volt-watt characteristic nonlinearity; voltage divider; Circuits; Frequency; Magnetic anisotropy; Magnetic field measurement; Magnetic fields; Magnetic sensors; Magnetoresistance; Perpendicular magnetic anisotropy; Sensor phenomena and characterization; Voltage;
