The Effect of Temperature on the Electrical Characteristics of Nanofluids Based on Palm Oil

This study sought to apply nanotechnology to develop the electrical characteristics of palm oil. Experiments were conducted using three types of nanoparticles: zinc oxide (ZnO), titanium dioxide (TiO2), and barium titanate (BaTiO3). The nanofluid samples were prepared by mixing the nanoparticles with palm oil using various processes. In the first scenario, a combination of palm oil with nanoparticles at 0.01 vol% was created, while the next sample had 0.03 vol% of nanoparticles. The samples were then fully dispersed using a magnetic stirrer, followed by ultrasonic dispersal in order to ensure homogeneity of the nanofluid. The electrodes were set 2.5 mm apart and the test was performed six times on each test sample in compliance with the IEC 60156 standard. The voltage breakdown characteristics were recorded for each of the liquids at temperatures varying from 35 °C to 90 °C. The results showed that for the palm oil samples containing nanoparticles, the voltage breakdown was greater than for the samples containing unmodified palm oil.

Transformers Nanofluids

This chapter interprets the impacts of powder nanoparticles on upgrading the electrical and physical properties of pure transformer oils and contains the new technologies for preparation transformers nanofluids. This chapter draws attention to the theories of dynamic charging and effective parameters for nanofluid polarization. Furthermore, this chapter presents recent procedures for estimation and control of nanofluids conductivity and the effects of nanoparticles on nanofluid conductivity. Moreover, this chapter demonstrates the favored methodology of nanofluid preparation and the tested high voltage breakdown. The precision of recommendation and forecast is another addition to qualitative investigations.

Fault Detecting Robot for Underground Electrical Cables Using ATMEGA Aurdino

Nowadays in urban areas electrical cables run underground instead of overhead. A wide variety of faults occur in underground cables due to improper conditions, wear and tear damages. For overcoming these, cables has to be replaced, which will affect the resistance and may leads to voltage breakdown. Therefore robots are designed to help during faulty condition where human interface is difficult. In this paper by implementing robotic features with a underground cable faults distance locator is done by using a microcontroller. The fault occurring at any point is displayed on LCD which is interfaced with the microcontroller that is used to make the necessary calculations. Robotics is considered as the fastest growing field helps human and minimize the gap of the underground cable faults through base station in kilometers and even as future scope robot can advanced with technologies like artificial intelligence and machine learning capability.

Experimental Analysis of 600V 4H-SiC Vertical and Lateral MOSFETs Fabricated on the same 6-Inch Substrate Using a Single Process

This paper aims to provide detailed experimental results of 4H-SiC vertical and lateral MOSFETs fabricated on the same 6-inch substrate using a single process flow. The cell optimization and fabrication scheme of both vertical and lateral MOSFETs are described in this paper. The measured electrical characteristics from both structures such as on-resistance, transconductance, threshold voltage, breakdown voltage, and capacitances are discussed. Resistance distribution and figure-of-merits of [Ron×Ciss], [Ron×Coss], and [Ron×Crss] for vertical and lateral MOSFETs are compared to further improve the characteristic of the lateral MOSFET.