Papers by Peter Stanislaw
Needle loom having improved needle beam guide system
The paper presents the National Research Council (NRC) activities to establish and maintain acdc ... more The paper presents the National Research Council (NRC) activities to establish and maintain acdc transfer difference standards of voltage and current at the lowest achievable uncertainty levels. It describes the AC Josephson Voltage Standard, a quantumeffect based standard of ac voltage based on pulsedriven Josephson junction arrays, recently introduced at NRC.
Abstract: This paper describes efforts undertaken to upgrade ac-dc current transfer standards and... more Abstract: This paper describes efforts undertaken to upgrade ac-dc current transfer standards and calibrations at the National Research Council of Canada. The ac-dc current transfer comparator has been redesigned, using guarding techniques most advantageous for the current shunt comparisons. A set of coaxial shunts for currents between 10 mA and 10 A has been built, and characterized up to 100 kHz by a step up procedure. The operating current range was further extended, up to 100 A, by a set of commercial shunts. Furthermore, the fabrication of a set of high current coaxial shunts, with low ac-dc transfer differences, was recently initiated to replace the commercial shunts as the working standards. 1.
Application of a Calorimetric Thermal Converter as a Standard of Acdc Voltage and Current Transfer Difference
At the National Research Council of Canada (NRC) the primary standard of AC-DC transfer differenc... more At the National Research Council of Canada (NRC) the primary standard of AC-DC transfer difference at frequencies from 10 kHz to 100 MHz is a Calorimetric Thermal Voltage Converter (CTVC). Because of a simple design, not unlike a coaxial calorimeter for RF power measurements, its frequency characteristic can be estimated theoretically from a number of mechanical and electrical parameters. An internal Tee, integrated into the CTVC, improves calibration accuracy of working standards. Over the years several of these converters have been manufactured for different operating voltages and with different frequency characteristics, leading to an optimized design with a frequency characteristic practically flat over eight decades of frequency. The paper describes details of construction of the CTVC. Results of RF-DC voltage transfer difference measurements, AC-DC current transfer difference and uncertainty evaluation of the converter are discussed.
The paper presents results of an international comparison of two quantum AC Josephson Voltage Sta... more The paper presents results of an international comparison of two quantum AC Josephson Voltage Standards based on pulse-driven Josephson arrays. The two systems differ in several hardware and software characteristics as well as in the level of automation, features which can influence the accuracy of transferring the quantum-standard voltage value to a calibrated instrument. The comparison was conducted at 100 mV, 20 mV and 12 mV, at frequencies between 2.5 kHz and 100 kHz. An electronically-aided thermal transfer standard was used as a travelling standard. At the most accurate voltage and frequency point, 100 mV at 2.5 kHz, both laboratories agreed to better than 1 part in 10.
Evaluation of LF AC-DC difference of coaxially mounted thermal voltage converter
IEEE Instrumentation and Measurement Technology Conference, 1997
The paper describes the mathematical model of a coaxially mounted thermal voltage converter. Resu... more The paper describes the mathematical model of a coaxially mounted thermal voltage converter. Results of simulations are compared with results of experiments conducted in the 1 kHz-1000 kHz frequency range
International comparison of quantum AC voltage standards for frequencies up to 100kHz
Measurement, 2012
ABSTRACT This paper presents results of an international comparison of two quantum AC voltage sta... more ABSTRACT This paper presents results of an international comparison of two quantum AC voltage standards based on pulse-driven Josephson arrays. The two systems differ in several hardware and software characteristics as well as in the level of automation, features which can influence the accuracy of transferring the quantum-standard voltage value to a calibrated instrument. The comparison was performed at 100 mV, 20 mV and 12 mV, at frequencies between 2.5 kHz and 100 kHz. An electronically-aided thermal transfer standard was used as a travelling standard. At the most accurate voltage and frequency point, 100 mV at 2.5 kHz, both laboratories agreed to better than 1 part in 106.
NCSLI Measure
Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, co... more Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.
Power components in a system with sinusoidal and nonsinusoidal voltage and/or currents
IEE Proceedings B Electric Power Applications
Improvement of the accuracy of thermal converter voltage measurements for frequencies up to 50 MHz
Proceedings of 1995 IEEE Instrumentation and Measurement Technology Conference - IMTC '95, 2000
Thermal converters with 5 V, 1000-ohm input parameters for use as transfer standards of voltage c... more Thermal converters with 5 V, 1000-ohm input parameters for use as transfer standards of voltage can be designed to have an ac-dc difference of less than ±0.1% up to a frequency of 50 MHz. With this high input impedance the repeatability of connection is significantly better than with a 50-ohm input impedance device. If this thermal converter is calibrated against
Discussion on "A harmonic analysis of the induction watthour meter's registrationerror" [7 (3), 1080-1088, July 1992]
NRC kW/kVA travelling standard
At the National Research Council of Canada (NRC) the primary standard of AC-DC transfer differenc... more At the National Research Council of Canada (NRC) the primary standard of AC-DC transfer difference at frequencies from 10 kHz to 100 MHz is a Calorimetric Thermal Voltage Converter (CTVC). Because of a simple design, not unlike a coaxial calorimeter for RF power measurements, its frequency characteristic can be estimated theoretically from a number of mechanical and electrical parameters. An internal Tee, integrated into the CTVC, improves calibration accuracy of working standards.
Extending NRC AC-DC current shunt calibration capabilities using coaxial shunts
Improvements in the AC-DC current transfer capabilities at NRC
Comments on "Characteristic errors of electronic watthour meters" [7 (1), 3-10, 1985]
RF-DC transfer difference standards and calibrations at NRC
The paper presents the National Research Council (NRC) activities to establish and maintain ac-dc... more The paper presents the National Research Council (NRC) activities to establish and maintain ac-dc transfer difference standards of voltage and current at the lowest achievable uncertainty levels. It describes the AC Josephson Voltage Standard, a quantum-effect based standard of ac voltage based on pulse-driven Josephson junction arrays, recently introduced at NRC.
Discussion on "Physical reasons of currents RMS value increase in power systemswith nonsinusoidal voltage" [8 (1), 437-447, January 1993]
AC-DC difference standards and calibrations at the National Research Council of Canada
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Papers by Peter Stanislaw