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wiring diagrams and tech notes
wiring diagrams and tech notes

Electrical characterizing of superconducting power cable consisted
Electrical characterizing of superconducting power cable consisted

... A reliable AC loss measurement was carried out on the 1.5 m long prototype HTS cable in order to quantify the AC loss of the HTS cable for cooling system design. The experimental measurement method is based on the electrical four probe method adopting a compensation coil to cancel the large inductiv ...
The Atom Electronic Training Course
The Atom Electronic Training Course

mcq-ele1 - WordPress.com
mcq-ele1 - WordPress.com

... 58. In order to achieve high accuracy, the slide wire of a potentiometer should be (a) as long as possible (b) as short as possible (c) neither too small not too large (d) very thick Ans: a 59. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potent ...
DC Machines
DC Machines

... rotation but not both. The voltage induced would be very low but the currents of very large amplitudes can be supplied by such machines. Such sources are used in some applications like pulse-current and MHD generators, liquid metal pumps or plasma rockets. The steady field can also be produced using ...
Lessons in AC Circuits
Lessons in AC Circuits

Book 2 AC
Book 2 AC

T E S L A The lost Inventions by George Trinkaus Here are the
T E S L A The lost Inventions by George Trinkaus Here are the

... condition in one swing-back. As we have seen with the capacitor, the disturbed electric medium, like a plucked guitar string, over-swings the center line of equilibrium to one side, then to the other, again and again, and this we know as vibration. In this way of looking at nature, vibration is ener ...
section-a - Dr. Sangeeta Khanna
section-a - Dr. Sangeeta Khanna

7. calculation of turn-turn capacitance of the hfcg
7. calculation of turn-turn capacitance of the hfcg

Linear Switched Reluctance Machine Drives with Electromagnetic
Linear Switched Reluctance Machine Drives with Electromagnetic

VTU : Jan.-10 - Technical Publications
VTU : Jan.-10 - Technical Publications

... · The Ohm's law gives relationship between the potential difference (V), the current (I) and the resistance (R) of a d.c. circuit. · It states that, the current flowing through the electric circuit is directly proportional to the potential difference across the circuit and inversely proportional to ...
Reduction of heat sink common-mode currents in switching mode
Reduction of heat sink common-mode currents in switching mode

... parasitic capacitance can be formed between the case of the semiconductors and the heat sink. The insulating thermal compound (Damiano et al., 2004) is the dielectric of this capacitance. It is shown as isolator 1 in Fig. 1. Common-mode EMI is usually the result of parasitic effects (Tihanyi, 1995). ...
Iza_MSthesis - Electrical and Computer Engineering
Iza_MSthesis - Electrical and Computer Engineering

... are insulating. Capacitive coupled plasma sources are simple to fabricate and compact, but they require more complicated electronics than DC sources to drive them. The fact that the electric field is perpendicular to the electrodes limits the ion density achievable with these devices. As the power a ...
All about ignition coils - BERU® by Federal
All about ignition coils - BERU® by Federal

Dynamos and dynamo design
Dynamos and dynamo design

... limited to the simplest principles of arithmetic and mensu ration, and in no case is any greater knowledge of mathe matics needed than the simplest elementary principles of algebra, geometry, and trigonometry, with a thorough, practical acquaintance with the use of the logarithmic table. To effect t ...
Effect of Strip Thickness - Electrical and Computer Engineering
Effect of Strip Thickness - Electrical and Computer Engineering

Integration Of Passive Components Into Integrated Circuits
Integration Of Passive Components Into Integrated Circuits

CONTENTS - Working Group
CONTENTS - Working Group

... IEC 60076-2:1993, Power transformers – Part 2: Temperature rise IEC 60076-3:1980, Power transformers – Part 3: Insulation levels and dielectric tests IEC 60076-3-1:1987, Power transformers – Part 3: Insulation levels and dielectric tests. External clearances in air IEC 60076-5:1976, Power transforme ...
Introduction to Technical Mathematics
Introduction to Technical Mathematics

Optimal Choice for Number of Strands in a Litz
Optimal Choice for Number of Strands in a Litz

... for the small strand diameters that are found to be optimal, and because its simplicity facilitates finding those optimal diameters. Other models (such as [19] and the similar analysis in [22]) also model large strand diameters and circular bundle configurations accurately, but they fully calculate ...
MODELING AND ANALYSIS OF POWER TRANSFORMERS UNDER FERRORESONANCE PHENOMENON.
MODELING AND ANALYSIS OF POWER TRANSFORMERS UNDER FERRORESONANCE PHENOMENON.

DISTRIBUTION TRANSFORMERS 11 kV/433
DISTRIBUTION TRANSFORMERS 11 kV/433

... transformers are being procured by the utilities under this programme as well as with their own resources to meet the GOI mission of Power for all by 2012. Recognising the importance of standardization of specifications of the distribution transformer for procurement of quality transformers, the Cen ...
Electromagnetic toroidal excitations in matter and free space
Electromagnetic toroidal excitations in matter and free space

... Initially, the static toroidal dipole (or anapole) was introduced as a configuration of static currents flowing on the surface of a torus6 (Fig. 1). It was pointed out that the external field of such a configuration is identically zero, whereas the currents create a magnetic field confined within th ...
transformer loss compensation for metermen
transformer loss compensation for metermen

... transformer was a variable load connected to the load side of the meter. The load is made up of two parts; the fixed portion, which keeps the transformer alive (no-load losses) and the variable part, which changes with the load (load losses). WHEN are transformer loss calculations performed? Transfo ...
1 2 3 4 5 ... 153 >

Magnetic core

A magnetic core is a piece of magnetic material with a high permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies. It is made of ferromagnetic metal such as iron, or ferrimagnetic compounds such as ferrites. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material. The magnetic field is often created by a coil of wire around the core that carries a current. The presence of the core can increase the magnetic field of a coil by a factor of several thousand over what it would be without the core.The use of a magnetic core can enormously concentrate the strength and increase the effect of magnetic fields produced by electric currents and permanent magnets. The properties of a device will depend crucially on the following factors: the geometry of the magnetic core. the amount of air gap in the magnetic circuit. the properties of the core material (especially permeability and hysteresis). the operating temperature of the core. whether the core is laminated to reduce eddy currents.In many applications it is undesirable for the core to retain magnetization when the applied field is removed. This property, called hysteresis can cause energy losses in applications such as transformers. Therefore, 'soft' magnetic materials with low hysteresis, such as silicon steel, rather than the 'hard' magnetic materials used for permanent magnets, are usually used in cores.
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