High Efficiency Induction Motor

Abstract: Three phase induction motors consume 60% of industrial electricity. Just 1% increase in efficiency of all the motors in India will save 500 MW powers which needs the initial generation cost of 2000 crores. The efficiency of an induction motor can be substantially improved by controlling the voltage to frequency ratio (V/Hz). Other methods of improving the efficiency of induction motor are 1. Coating enameled copper wire filled with several nanofillers such as Al 2 O 3 , SiO 2 , TiO 2 , CNT, ZrO 2 and so on. Coating of induction motor filled with nanofillers. One such method used in this project was carried out under serious literature survey. Based on the previous project works, actions were taken to use the enamel filled with SiO 2 andTiO 2 nanofiller as the coating for the induction motor to improve its efficiency. Definitely, there will be a tremendous improvement in the efficiency of the induction motor and hence the motor can be called as "High Efficiency Induction Motor"

An Overview on Nano Metric Surface Finishing Techniques

Abstract: This paper deals with free form optics, ELID, partial ductile mode grinding, ductile regima grinding, four domains of material removal, selection of tool materials, ultra precision grinding, aspherical surface generation grinding wheel. Advantages, disadvantages, applications, operation of the above methods were also discussed in brief manner for understanding the concepts. This paper would be useful for the readers to know the basic concepts in the nano metric surface finishing techniques

REDUCTION OF ELECTROMAGNETIC INTERFERENCE IN SINGLE PHASE INDUCTION MOTOR BY COATING THE WINDING WITH Al 2 O 3 NANO FILLER MIXED ENAMEL

ABSTRACT -It has been observed that the addition of nano fillers to the enamel can greatly improve the thermal, mechanical and electrical properties of enamel. Al 2 O 3 has been tested as nano filler. The micro particles of Al 2 O 3 are converted into nano particles by using the ball mill method. Scanning electron microscope (SEM) has been used to augment the particle size of the prepared nano particles. The Al 2 O 3 nano filler was mixed with enamel by using ultrasonic vibrator. The enamel filled with the Al 2 O 3 nano filler was coated on the windings of a motor. The values of electromagnetic inference produced by normal induction motor and nano coated induction motor was measured and analysed. There was a reduction of 5 to 15% in the values of the electromagnetic interference produced by the normal induction motor when compared to that of Al 2 O 3 nano filler mixed enamel coated induction motor at various distances. I.INTRODUCTION Dielectric materials were construction materials which were frequently employed in contact with metals. In equipment and installations for the supply of electricity, heat was generated by ohmic losses in conductors, through dielectric losses in insulating materials and through magnetization and eddy-current losses in the iron. The dielectric losses will depend upon the dielectric properties of the insulation such as breakdown strength, partial discharge characteristics, frequency, type of applied voltage, intensity of electric field and loss tangent II.PREPARATION OF NANOFILLERS The micro powders of Al 2 O 3 were crushed into nano powders by Ball Mill method. The SEM images of Al 2 O 3 before and after Ball Mill show the particle size of the powders. The particle size was augment by SEM images. A. SEM analysis Before Synthesisation The micro size particles of Al 2 O 3 were in the range from 10 to 100 µm size. Th

Performance Analysis of Single Phase Induction Motor Coated with Al2O3 Nano Filler Mixed Enamel

Abstract — In the last decades, it has been shown that the properties of the enamel used in the induction motor were improved by adding the nano fillers to it. The performance of the motor was also improved by using the enamel filled with the nano fillers. In this paper, the performance of the single phase induction motor coated with Al2O3 nano filler mixed enamel was analyzed by conducting many tests such as open circuit test, short circuit test, load test and thermal withstanding test on it and the results were compared with that of the normal single phase induction motor. The test results show that there was a tremendous improvement in the performance of the single phase induction motor coated with Al2O3 nano filler mixed enamel when compared to that of the normal single phase induction motor. The efficiency of the induction motor was increased to a maximum 6 % by adding nano filler of Al2O3 to the enamel used as the coating for the windings in the single phase induction motor. The addition of nano fillers to the enamel has increased the temperature withstanding capacity of the induction motor. Hence the life time of the motor will be increased

A Literature Review on Synthesis and Characterization of enamelled copper wire filled with CNT

Abstract: This paper discusses about the survey on the various magazines, conference papers and journals for understanding the properties of enamelled copper wires mixed with nano fillers, fundamental methods for synthesis and characterization of carbon nanotubes. From all these papers, it was noted that the research work carried out in an enamelled copper wires filled with nano fillers has shown better results. It was also recorded that the research work was carried mostly with single metal catalysts and very little amount of research work has been carried out on the synthesis of carbon nanotubes using bimetallic catalysts

Brain microglia in psychiatric disorders

Summary The role of immune activation in psychiatric disorders has attracted considerable attention over the past two decades, contributing to the rise of a new era for psychiatry. Microglia, the macrophages of the brain, are progressively becoming the main focus of the research in this field. In this Review, we assess the literature on microglia activation across different psychiatric disorders, including post-mortem and in-vivo studies in humans and experimental studies in animals. Although microglia activation has been noted in all types of psychiatric disorder, no association was seen with specific diagnostic categories. Furthermore, the findings from these studies highlight that not all psychiatric patients have microglial activation. Therefore, the cause of the neuroinflammation in these cohorts and its implications are unclear. We discuss psychosocial stress as one of the main factors determining microglial activation in patients with psychiatric disorders, and explore the relevance of these findings for future treatment strategies