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Topic: Electrical magnet

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	Electromagnet - Wikipedia, the free encyclopedia
		An electromagnet is a type of magnet in which the magnetic field is produced by a flow of electric current.
		As a current is passed through the electromagnet, small magnetic regions within the material, called magnetic domains, align with the applied field, causing the magnetic field strength to increase.
		Electromagnets are used in a rotary electric motor to produce a rotating magnetic field that turns the rotor, or in a linear motor to produce a traveling magnetic field that propels the armature.
	en.wikipedia.org /wiki/Electromagnet (1054 words)

	DePalma Patent
		The poles of the magnets are preferably orientated co-axially with the axis of the tube and the tube is preferably rotated at high speed.
		The magnetic fields produced when they are cooled and energised must be poled NSSN or SNNS and the spacing of the coils adjusted to produce radial flux lines perpendicular to the central voltage producing segment, (of the [5] rotating conductive cylinder enclosing and supporting the magnet solenoids).
		The cancellation of the magnetic fields due to the high currents in the generator is important, since the field distortion (armature reaction) produced by these currents when uncompensated can limit the power output of the machine by altering the perpendicularity of [20] the flux lines to the rotating cylindrical tube 3.
	depalma.pair.com /patent.html (5323 words)

	Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives - Patent 4651066
		The motor is characterized by an external ferrite permanent magnet rotor (26) drivingly engaging an input shaft (32) of the transaxle.
		The remaining end of winding 50 is electrically connected to the collector of a large power transistor 56 and interconnected to a negative bus 58 from the negative terminal of battery 40 through an inverse parallel diode 60.
		Magnet segments 132 are radially polarized in a sense opposite to that of adjoining magnet segments 132.
	www.freepatentsonline.com /4651066.html (17388 words)

	Electrical Terms
		INDUCTANCE - The property of an electric circuit by which an electromotive force (voltage) is induced in it by a variation of current either in the circuit itself or in a neighboring circuit.
		MAGNETIC NORTH - The direction sought by the north pole end of a magnet, such as a magnetic needle, in a horizontal position.
		MAGNETIC SOUTH - The opposite direction from magnetic north towards which the south pole end of a magnet, such as a magnetic needle, is attracted when in a horizontal position.
	www.swtc.edu /Ag_Power/electrical/terms.htm (4236 words)

	Permanent Magnet Design Guidelines
		Magnets are an important part of our daily lives, serving as essential components in everything from electric motors, loudspeakers, computers, compact disc players, microwave ovens and the family car, to instrumentation, production equipment, and research.
		This curve describes the cycling of a magnet in a closed circuit as it is brought to saturation, demagnetized, saturated in the opposite direction, and then demagnetized again under the influence of an external magnetic field.
		For magnet materials with straight-line normal demagnetization curves such as Rare Earths and Ceramics, it is possible to calculate with reasonable accuracy the flux density at a distance X from the pole surface (where X>0) on the magnet's centerline under a variety of conditions.
	www.magnetsales.com /Design/DesignG_frames/frame_dgbod2.htm (1987 words)

	Applications: Telecommunications - Trends in the Use of Copper Wire & Cable
		The assumption is made that, while wiring practices may vary widely from country to country, including use of conductor materials as well as usage intensity of each type of wire and cable, nevertheless historical US trends, and their implications for the future, should be instructive for much of the rest of the world.
		In the USA electric utility power cable is installed predominantly overhead and is aluminum, while in other countries, for example the Netherlands, the tradition is to install power cable underground, and to use a significantly greater proportion of copper.
		This means that, for a given wattage of demand, the electric current in the US 120 v circuits is twice as large, resulting in the need for correspondingly larger wire on average, since conductor wire must be sized according to current.
	www.copper.org /applications/telecomm/trends_cable.html (4729 words)

	Frequently Asked Questions
		If a magnet is stored away from power lines, other magnets, high temperatures, and other factors that adversely affect the magnet, it will retain its magnetism essentially forever.
		The actual measurement will depend on whether the magnet has any steel attached to it, how far away from the surface you make the measurement, and the size of the magnet (assuming that the measurement is being made at room temperature).
		Magnetic Poles are the surfaces from which the invisible lines of magnetic flux emanate and connect on return to the magnet.
	www.magnetsales.com /Design/FAQs_frames/FAQs_2.htm (1104 words)

	Alternator Summary
		Faraday showed that voltage could be produced by magnetism provided three conditions existed: there had to be a conductor in which to induce the voltage, a magnetic field had to be close to the conductor, and a relative motion had to occur between the magnetic field and the conductor.
		The rotor magnetic field may be produced by induction (in a "brushless" generator), by permanent magnets (usually in very small machines), or by a rotor winding energized with direct current through slip rings and brushes.
		Note that the rotating magnetic field can actually be produced by two coils, with phases shifted about 90 degrees, but such field would not be symmetric due to difference between magnetic susceptibility of ferromagnetic materials of pole and air.
	www.bookrags.com /Alternator (3072 words)

	Magnet falls freely in superconducting tube (September 2006) - News - PhysicsWeb
		Levin explained that the magnet induces electrical currents within the walls of the superconducting tube, which in turn create a magnetic field inside the tube.
		This is true even when the the magnet is moving because the lack of electrical resistance in the tube means that the symmetrical magnetic field can simply follow the magnet as it falls with zero dissipation of kinetic energy.
		For tubes made of conventional conductors such as copper, the braking force on a magnet is proportional to its velocity and the magnet very quickly reaches its terminal velocity inside the tube.
	physicsweb.org /articles/news/10/9/13/1 (546 words)

	BIOMAGNETIC HEALING
		A magnetic field is caused by electrical charges in motion, as opposed to an electric field, which is produced by electrical charges in different concentrations, more in one place than the other, regardless of whether or not they are moving.
		It assumes that the north pole of the magnet is where it's supposed to be--in the geographic north pole of the earth, and the south pole is in the southern hemisphere.
		With this definition, a suspended bar magnet, or the arrowhead of a compass needle that points north, is always the south end of the magnet or the south end of the compass needle.
	www.garynull.com /Documents/magnets.htm (14945 words)

	NASA Quest > Space Team Online (Site not responding. Last check: 2007-10-10)
		This law states that the amount of current (i) in an electrical circuit is directly proportional to the voltage (v) of the circuit and inversely proportional to the resistance (r) of the circuit.
		Electrically charged particles become trapped on those field lines just as iron filings become trapped on the force lines of the bar magnet.
		Lay the magnet on the stage of an overhead projector and cover the magnet with a sheet of transparency paper.
	quest.arc.nasa.gov /space/teachers/liftoff/tether.html (2843 words)

	Motionless Electromagnetic Generator
		Magnetic vector potential A comes in two varieties: (i) the normal A-potential, which has a curl component called the B-field, and (ii) a curl-free A-potential without a curl component and therefore without the B-field (also called a “field-free” A-potential).
		The present-day absence of COP > 1.0 normal electrical power systems, doing external work and freely taking all their input energy from the local vacuum and spacetime curvature, is strictly due to the archaic electrical engineering model and the prevailing use of the closed current loop circuit.
		Thus there are two energy inputs: (i) the electrical energy input paid for by the operator, and (ii) the free environmental energy input furnished by the external atmosphere and processed a bit by compressing, etc. at very low cost.
	www.wanttoknow.info /beardenmeg (4485 words)

	electrical project Sellers, Suppliers, Exporters, Manufacturers, Factories (Site not responding. Last check: 2007-10-10)
		Electric Motorcycle 600W-New Style /Electric Scooters & Bicycles
		Detailed Product Description Brief introduction of cable tray: The electric cable bridge are widely used on construction projects such as laying electrical wire and cable etc. Making the lay of the electric wire, el....
		At any time and anywhere can the small scaled electric appliances of opponent machine, few code camera....
	www.fuzing.com /qrx/electrical_project (568 words)

	Michael Faraday/Free Energy/AG
		This is an alternate electrical generator discovered by Faraday in the 1830's when he also discovered the stationary-magnet/rotating-coil generator.
		The latter generator is presently the basic device producing nearly all of the electrical power world-wide.
		Recent researchers are now claiming that the rotating-magnet generator, as shown above, produces over 100% efficiency and can thereby be a source of 'Free-Energy' with no resultant pollution.
	antigravitypower.tripod.com /FreeEnergy/faraday.html (106 words)

	standard electrical Sellers, Suppliers, Exporters, Manufacturers, Factories (Site not responding. Last check: 2007-10-10)
		Pedal Electric Bicycle with Front and Rear Shock Absorption Deluxe pedal electric bike with a child seat in the front
		Pedal Electric Bicycle with Front and Rear Shock Absorption Deluxe pedal electric bike with a child seat in the front Enhanced aluminium wheel with motor intelligent Brushless motor, rare-earth permanent magnet prod....
		As Gibson’s first solidbody electric guitar, the Les Paul Model made a lasting impression when it debute....
	www.fuzing.com /qrx/standard_electrical (674 words)

	Electro Magnet ( Mag - Roll )(TMRL) - T. H. Elema Eng. Co., Ltd.
		Co., Ltd. Home : Products Product Description: Electro Magnet (Mag - Roll)(TMRL), This magnet is suitable for transportation of steel pipes or steel materials.
		Cable connector is used to attach magnet electrical leads to power cables.
		This magnet is suitable for transportation of steel pipes or steel materials.
	www.allproducts.com /korea/th/tmrl.html (180 words)

	Copper Wire, Custom Cable and Electrical Cable by Arcor — Aluminum wire, copper braid, magnet wire and more.
		Copper Wire, Electrical Cable and Custom Cable design and application engineering are just a few of Arcor’s specialties.
		With our large selection of wire, which includes copper wire, aluminum wire, brass wire, magnet and thermocouple wire, Arcor is the perfect place to purchase off the shelf industry standard wire.
		Similarly, thermocouple cable, electrical cable or electronic cable can be found under the cable index.
	www.arcorelectronics.com (301 words)

	electrical connectors magnet connectors micro connectors round connectors electric cable connectors wiring devices ... (Site not responding. Last check: 2007-10-10)
		onnomac Corp., of La Grange, Illinois, is dedicated to manufacturing the highest quality electrical connectors and providing them in a timely manner.
		Extensive electrical testing and visual checks are performed on 100% of our product to ensure its high quality and durability.
		If you have a special problem, Connomac Corp. can work with you to design a solution for your particular needs.
	www.connomac.com (152 words)

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