Title :
Development of the New PTB Highly Accurate AC Power Source
Author :
Bergeest, R. ; Kahmann, M. ; Klonz, M. ; Zirpel, R. ; Miljanic, P. ; Stojanovic, B.
Author_Institution :
Physikalisch-Technische Bundesanstalt
Abstract :
A highly accurate ac power source for unity power factor with an expected total uncertainty of a few parts in 10/sup 6/ to be used in the power frequency range is described. The rms value of the output voltage is continuously readjusted to a precisely known dc reference voltage using a multijunction thermal converter. A reference current is derived from the output voltage using an accurately known reiistor. The output current of a transconductance amplifier is compared to this reference current by means of a current comparator and continuously readjusted.
Conference_Titel :
Precision Electromagnetic Measurements, 1988. CPEM 88 Digest. 1988 Conference on
Conference_Location :
Ibaraki, Japan
DOI :
10.1109/CPEM.1988.671336