Title :
Measurement of C and tanδ of a capacitor employing PSDs and dual-slope DVMs
Author :
Kumar, Jagadeesh V. ; Sankaran, P. ; Rao, Sudhakar K.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Madras, India
Abstract :
A scheme for measuring the C and tanδ (dissipation factor D) values of a capacitor is described in this paper. Comparing the unknown capacitor to a standard capacitor and employing three-phase sensitive detectors and two digital voltmeters, the parameters of the unknown capacitor are determined. The method facilitates testing of a given capacitor at a desired frequency as well as voltage. The feasibility of the scheme is established by building a prototype. The accuracy of the prototype unit for the measurement of C is ±0.2% and that for tanδ is ±2.5%.
Keywords :
capacitance measurement; capacitors; dielectric loss measurement; digital voltmeters; phase detectors; PSDs; capacitor; digital voltmeters; dual-slope DVMs; feasibility; tanδ; three-phase sensitive detectors; unknown capacitor; Bridge circuits; Capacitance; Capacitors; Detectors; Equivalent circuits; Frequency; Oscillators; Prototypes; Voltage; Voltmeters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.817919
