Permittivity experimental determination as a frequency function

Objective: To determine the behavior of dielectric permittivity of class II ceramic capacitor in function of frequency up to 10MHz. Context: in telecommunications and high frequency circuits is necessary to take into account the diminishing of permittivity on dielectrics of ceramic capacitors with the frequency growth, two quantitative methods are proposed to determine this behavior. Method: First, the impedance meter bridge FLUKE PM5306 was used in the frequency range from 10^2 Hz to 10^5 Hz; and second, a novel low-cost electronic circuit for the frequency range between 10^4 Hz to 10^7. Results: The results from the circuit were validated using the impedance meter bridge RLC FLUKE PM 6306. The measure of the complex capacitance from three capacitors and their loss tangent were obtained. Conclusions: The capacitance decreasing with the increment of the frequency was observed in the impedance meter bridge and the implemented circuit, finding a convergence between both methods in the common frequency region.

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

This work shows a planar interdigital sensor for rapid measurement of oils. The kit is characterised by the impedance meter, a Raspberry Pi3 and a sample port where the planar capacitive interdigital multifinger (IDCM) sensor is stored. For validation of this IDCM sensor, the data was compared with measurements performed by impedance spectroscopy (IS). The measurements show that the measured values of the new and used oils are very close, validating the IDCM sensor for fast oil measurements of oils in transformers and other devices.

Influence of Potential Differential Voltage on Electric Resistance of Needle Punched Non-Woven Jute Fabrics

In this research, the electrical resistance of needle-punched non-woven jute fabric at different input voltage was measured. Here, to determine the electrical resistance, a device named the digital impedance meter has been used. The specific resistance for the different gauge lengths of non-woven jute fabric has been observed to enhance the use of jute fabric for electrical purposes. It has been observed that the electrical resistance increased with the higher value of gauge length and decreased with the increase of input voltage.

Examination of a Fabricated Impedance Meter by Analysing the Electrical Properties of Ni0.65Zn0.35Fe2O4 (Ferro-Magnetic) Material

Impedance (Z) may be defined as the total opposition by a component (or electronic material) that offers to the AC (alternating current) at an applied signal frequency, parameters of impedance are utilized to analyze materials/electronic components characteristics. Impedance/LCR measuring instrumentation are costly or either do not enough accuracy and may have limited frequency range. There are many impedance measurement methods, each of which has their own pros and cons. While considering factors like frequency range, measurement band width, accuracy in measurement and its ease of operation, there is no single impedance measurement instrument that includes all these parameters. This research article describes a handy/portable impedance meter that depends on auto balancing bridge technique, which is capable of making impedance parameter measurements up to 20 Mhz frequency. An analog frequency generator was made up of max038 (IC) which stimulates the impedance measurement circuit that was composed of reference and also the impedances that are unknown. The applied frequency through the impedances (electronic materials) and their electronic parametrics like inseries inductance (Ls), inparallel capacitance (Cp) and inseries resistance (Rs) along with some sub-parameters were first digitalized and then displays. The fabricated impedance meter’s performance was analysed by correlating the results obtained by it, with the results of a commercially available impedance instrument-the Newton 4 th limited, NumetriQ, Model no. PSM-1735, for different composite electronic materials, some of them are multi-ferrites, ferroelectric and ferro-magnetic, materials. For every material, the error percentage was analysed; which is less than 3% was observed. In this paper, Ni0.65Zn0.35Fe2O4 -Ferro-magnetic material’s both thermal properties and electrical properties were analysed by fabricated and by the commercial instruments. Results are tabulated and then graphs are plotted.