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Short-Circuit Withstand Capability of Power Transformers
Short-Circuit Withstand Capability of Power Transformers

File
File

... Oersted discovered that there was a relationship between electricity and magnetism. Thanks to Oersted and a few others, by using electricity, we can now make huge magnets. We can also cause them to release their objects. Electricity and magnetism are closely related. The movement of electrons causes ...
AC-MACHINES.PPT
AC-MACHINES.PPT

Step 1: Run skewer through two corks as shown
Step 1: Run skewer through two corks as shown

TRANSIENTS IN NO-LOAD CONDITION OF POWER
TRANSIENTS IN NO-LOAD CONDITION OF POWER

Innovative Pencil-Type Ignition Module from Beru for the Porsche V8
Innovative Pencil-Type Ignition Module from Beru for the Porsche V8

... when the ignition coil is fitted in position. This ensures that the requirements with regard to maximum corrosion resistance and protection against accidental contact are optimally fulfilled, Figure 4. 3.2 Interior Design ...
Did Tesla`s Wardenclyffe tower generate squarewaves?
Did Tesla`s Wardenclyffe tower generate squarewaves?

Section 5. Electricity and Magnetism Course
Section 5. Electricity and Magnetism Course

... (d) calculate the forces on charges in uniform electric fields (e) describe the effect of a uniform electric field on the motion of charged particles (f) recall and use Coulomb’s law in the form F = Q1Q2/4πε0r 2 for the force between two point charges in free space or air ...
the low-voltage lighting application note (PDF, 76
the low-voltage lighting application note (PDF, 76

... 1. Use a Hi-Power 2•4•6TM Dimming Module with a 600W incandescent dimmer in this product family; when dimming ELV with a Hi-Power 2•4•6TM Dimming Module, transformer must be approved for use with standard incandescent dimmers. 2. To dim electronic low-voltage lighting with this control type, use of ...
Initialization of Cryogenic S600X Magnetometer
Initialization of Cryogenic S600X Magnetometer

... Interference Devices (SQUIDs) at Ford Research Laboratories in the mid-1960s. The first to be invented was the direct current (DC) SQUID which was soon to be followed by the radio frequency (RF) SQUID [1]. Though the DC SQUID was developed first, and still offers the highest sensitivity, RF SQUIDs a ...
Teaching Faraday`s law of electromagnetic induction in
Teaching Faraday`s law of electromagnetic induction in

... acting on a charge q that moves with the speed of the circuit. Thus, the Lorentz force naturally follows from the definition of the rate of flux change d⌽ / dt as a complete derivative. There are cases where Faraday’s law of induction is applied not to circuits, but to extended bodies, such as a Far ...
DC Motor Theory
DC Motor Theory

... Since the armature is now a coil of wire, it will need DC current flowing through it to become magnetized. This presents another problem; since the armature will be rotating, the DC voltage wires cannot be connected directly to the armature coil. A stationary set of carbon brushes is used to make co ...
MT-20-4M06 SHMS Q23-v2 - Hall C
MT-20-4M06 SHMS Q23-v2 - Hall C

... It also contains the “burnout proof” current leads, JLAB standard cryogenic control valves, bayonets, and some of the magnet instrumentation. V. SHMS Q23 “NO BURNOUT” CURRENT LEADS The SHMS magnets will all be equipped with nominal 5000 Amp vapor cooled current leads that are a “no burnout” design. ...
Set1 - CBSE
Set1 - CBSE

... [Any one of the above, or any one, other, correct distinguishing feature.] At absolute zero temperature conductivities of both type of semi-conductors will be zero. For equal doping, an n-type semi conductor will have more conductivity than a p-type semiconductor, at room temperature. Set1,Q22 Set2, ...
Hall Application Guide
Hall Application Guide

... field is removed the magnetic field value of the sample "relaxes" to a steady state known as the Br value, or residual flux value. An analogy to charging a battery is appropriate. At some level the battery is fully charged and will not accept any more energy. It is an amazing thing however that the ...
Connecting IGBTs in Parallel (Fundamentals)
Connecting IGBTs in Parallel (Fundamentals)

Chapter 13 Review
Chapter 13 Review

transformers - Crompton Instruments
transformers - Crompton Instruments

... A transformer is a device that transfers electrical energy from one circuit to another by electromagnetic induction (also called transformer action). It is most often used to step up or step down voltage. Occasionally, it is used as an isolating device to eliminate a direct mechanical electrical con ...
Brochure
Brochure

U.S. patent number: 5710531
U.S. patent number: 5710531

... by a ferromagnetic flux guide 45. The flux guide 45 of ferromagnetic material, such as transformer steel, may be positioned immediately inside the shielding means 30 but not in contact with it. The flux guide 45 completely encloses the magnet 13. The shield is so mounted that it is freely rotated on ...
Atomic spins on surfaces
Atomic spins on surfaces

... A quantum spin can be described with discrete spin states, the energy eigenstates that depend on the quantum state of the spin. The simplest example is a spin-1⁄2 atom in a magnetic field B. The field gives rise to the Zeeman energy EZ, which lifts the degeneracy of the two spin states, usually call ...
U. Kim Spiral Inductor
U. Kim Spiral Inductor

Low-Field Magnetic Sensing with GMR Sensors
Low-Field Magnetic Sensing with GMR Sensors

... encountered with low fields, magnetic fields of less than an Oe are gaining increasing attention in industry. Compassing applications detect the components of the Earth’s magnetic field (less than one-half Oe) to determine direction relative to magnetic North. Sensitive instruments which measure mag ...
qb1 quick break tester - MagDoc from Magnaflux EMEAR
qb1 quick break tester - MagDoc from Magnaflux EMEAR

... is dissipated through resistance. This effect is commonly called ring down. Quick Break is a term associated with the circuitry employed to rapidly terminate high amperage direct current (DC) flowing through a magnetizing coil. The resulting rapid collapse of the coils magnetic field imparts a desir ...
to go to any of the pages listed below, click on its title
to go to any of the pages listed below, click on its title

< 1 ... 29 30 31 32 33 34 35 36 37 ... 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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