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Topic: Permanent magnet motor

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	Electric motor - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-09)
		As the poles of the armature electromagnet pass the poles of the permanent magnets, the commutator reverses the polarity of the armature electromagnet.
		The speed of the motor is proportional to the voltage, and the torque is proportional to the current.
		The permanent magnets on the outside (stator) of a DC motor may be replaced by electromagnets.
	en.wikipedia.org /wiki/Permanent_magnet_motor (3896 words)

	Hybrid Stepping Motors Permanent Magnet Step Motor
		Hybrid stepping motors combine a rotor with a permanent magnet and a magnetic body using ball bearings.
		Permanent magnet (PM) stepping motors use a permanent magnet (PM) as a rotor and contain no ball bearings.
		Permanent magnet stepping motors are widely used in printers, copiers, and scanners, or to activate valves in household water and gas systems, and as actuators in automotive applications.
	www.nmbtech.com /step_stepping_motor_hybrid_permanent.htm (394 words)

	Linear DC permanent magnet motor - Patent 4369383 (Site not responding. Last check: 2007-10-09)
		The motor according to claim 1 or 2 wherein said field member is in the form of a two-part slider.
		The force produced by the motor has a magnitude directly proportional to the current in the windings and a direction which is a function of the direction of that current.
		Permanent magnets 30 develop magnetic flux which interacts with the current flowing through the energized windings 14 thereby causing field member 12 to travel along wound member 10.
	www.freepatentsonline.com /4369383.html (2198 words)

	Howard Johnson: Permanent Magnet Motor
		The length of the armature magnet is defined by poles of opposite polarity, and the length of the armature magnet is disposed relative to the track defined by the stator magnets in the direction of the path of movement of the armature magnet as displaced by the magnetic forces.
		The magnetic field of the armature magnet may be concentrated and directionally oriented by bowing the armature magnet, and the magnetic field may further be concentrated by shaping the pole ends of the armature magnet to concentrate the magnet field at a relatively limited surface at the armature magnet pole ends.
		For further magnetic field concentrating purposes the ends of the armature magnet are shaped by beveled surfaces 30 to minimize the cross-sectional area at the magnet ends at 32, and the magnetic flux existing between the poles of the armature magnet are as indicated by the light dotted lines.
	www.rexresearch.com /johnson/1johnson.htm (16745 words)

	Permanent Magnet Motor
		Conventional electric motors may employ permanent magnets, but the use of permanent magnets require the creation of an electromagnetic field to act upon the field produced by the permanent magnets, and switching means are used to control the energization of the electromagnets and the orientation of the magnetic fields, to produce the motive power.
		Previously, a permanent magnet motor has not been used because it was not possible to modify the electron flow to accomplish the switching of the magnetic field.
		Switching functions are common in a conventional electric motor where electrical current is employed to align the iron pole pieces and concentrate the magnetic field at the proper places to give the thrust necessary to move the motor.
	alternative-technologies.org /permanent_magnet_motor.html (421 words)

	Linear DC permanent magnet motor - Patent 4644199
		A linear, DC motor according to claim 1 wherein said field members are movable and each include two permanent magnets.
		The motor according to claim 7 wherein said wound member comprises two parts and said air gaps are substantially equal.
		The motor according to claim 9 wherein said permanent magnet field members comprises at least two permanent magnets located between said two parts of said wound member.
	www.freepatentsonline.com /4644199.html (2472 words)

	Science & Mechanics permanent magnet motor article text
		The 40 pound magnet assembly immediately began to turn and accelerated to a very respectable rotating speed which it maintained for as long as the focusing magnet was held in the magnetic field.
		The length of this magnet (about 3+1/8 inches) is chosen, in relation to the pairs of stator in magnets plus the space between them, so that once again the attraction/repulsion forces work to move the armature magnet to the left.
		That very different magnetic conditions exist at the two ends of the armature is shown by the actual experimental data displayed in the table and associated graph.
	newebmasters.com /freeenergy/sm-text.html (3803 words)

	The permanent magnet motor (Drives Supplement. November 2002) (Site not responding. Last check: 2007-10-09)
		In a dc permanent magnet motor magnetic flux is provided by permanent magnets, and the torque is produced by an interaction between the radial magnetic flux produced by this permanent magnet and the axial current carrying conductors on the armature or rotor.
		Additionally, many permanent magnet materials have a working temperature less than the normal operating condition of many motors, so torque is usually limited to 150% of its rated value to prevent demagnetisation.
		As the armature rotates in the magnetic field, a generator effect occurs and an electromotive force (emf.) is induced in the armature circuit.
	www.dpaonthenet.net /drives/drives_nov0201.htm (696 words)

	Calloway PPM Secrets - 06/19/01
		When gluing magnets to the wheel, start at the outside of the face of the wheel and gradually work the magnets inwards so that the latter magnets in the 180 degrees wind up 3" inward outside of the wheel on the opposite side.
		When testing your wheel after the magnets are glued on, the wheel must gate freely through all magnets for 180 degrees then coast back around and back into the gate which starts the whole process over again.
		We have to back off of the "chaser" magnet to give the bearings on the "running" magnet a chance to roll backwards, but the force of the "chaser" magnet is there, but not as strong.
	www.keelynet.com /energy/callomag.htm (2535 words)

	Infolytica » Gallery » Permanent Magnet Stepper Motor
		The motor is made of a stator with eccentric pole faces and a rotor made of samarium cobalt permanent magnet (magnetized in a fixed direction) that rotates in steps of 180 degrees.
		The stepper motor used in this gallery page is made of a stator with eccentric pole faces and a rotor made of samarium cobalt permanent magnet that is magnetized in a fixed direction.
		After the pulse is complete, there is a magnetic torque due to the permanent magnetism of the rotor trying to align itself with the stator pole faces.
	www.infolytica.com /en/coolstuff/ex0096 (654 words)

	RAE Corporation
		RAE Corporation offers a broad range of fractional horsepower, permanent magnet, DC brush type motors, parallel shaft and right angle gearmotors, wound field motors, and DC motor drives.
		Typical offerings are in the 1/70 to 1/3 horsepower range, with input voltages from 12 volts to 180 volts DC for permanent magnet product, and 12 volts to 230 volts DC/AC for wound field product.
		Motor speeds are available up to 5000 RPM, with torques available up to 165 inch ounces.
	www.raemotors.com (302 words)

	Perendev is Tooling Up for Magnetic Motor Mass Production in Europe
		JOHANNESBURG, SOUTH AFRICA -- For centuries, inventors have been claiming to come up with magnetic motor designs that use nothing more than the power of permanent magnets for the motive force; and for the same amount of time, mainstream science has responded that this is impossible.
		Other inventors who claim to have built working all-magnetic motors would take exception to the Perendev claim to being the first, as stated on the site.
		Perendev Magnetic Motor to Debut on German TV - All-magnet motor emerging from first production run set to be viewed by German television audience.
	pesn.com /2004/06/30/6900029PerendevPowerMagneticMotor (1144 words)

	permanent magnet motor:DC motors Series 148:Hansen Corp.
		These motors are available in five different mounting configurations and a wide variety of gear ratios.
		DC Gear Motors are available with a wide variety of output shaft configurations some of which are shown on pages 20 and 21.
		Motor life is dependent on speed, torque, number of start-stop cycles, duty cycle, etc.
	www.hansen-motor.com /dc_148.html (194 words)

	Brushless Permanent Magnet Motor Design
		Illustrates over 50 motor designs ranging from a 2 pole, 3 slot motor to a 32 pole, 36 slot motor.
		Provides motor cross section, winding layout, and performance details for each design.
		Rigorous analytic description of the magnetic field distribution in the magnets and air gap that is applicable to radial field, axial field, and linear motors.
	www.eece.maine.edu /motor (225 words)

	Amazon.com: Brushless Permanent Magnet Motor Design: Books: Duane C. Hanselman (Site not responding. Last check: 2007-10-09)
		Permanent Magnet Materials and their Application (Cambridge Studies in Magnetism) by Peter Campbell
		In addition, the author fully explains techniques for magnetic modeling and circuit analysis, shows how magnetic circuit analysis applies to motor design, describes all major aspects of motor operation and design in simple mathematical terms, develops rigourous design equations for radial flux and axial flux motors, and illustrates basic motor drive schemes.
		All common motor design terms are clearly defined and a wealth of charts, tables and equations are included.
	www.amazon.com /exec/obidos/tg/detail/-/1932133631?v=glance (838 words)

	Perendev's permanent magnet motor - Halflife2.net
		The motor consist's of offset magnets in a Stator, and a rotor.
		The device uses powerful Neodynium magnets, and produces 20 killowats of power (enough to sustain your home requirements), there is also another device in design of a larger scale that can produce 4 megawatts (the equivelant to a small powerstation).
		The mangnetic force's constant superiority over the friction envolved, aslong as the magnets are good the device will turn for hundreds of years (aslong as the magnets last) if kept.
	www.halflife2.net /forums/showthread.php?t=36476 (971 words)

	gearmotors: DC permanent magnet motors - Motor Technology
		The model FMR DC permanent magnet motor is particularly suitable for military and high quality industrial applications with extremely high power applications.
		Special magnets contribute greatly to this motor’s superior efficiency.
		Motor Technology engineers can customize the FMR motor to deliver the exact performance you need.
	www.motortech.com /dcmotorFMR_GI.htm (80 words)

	David Butcher: Pedal Powered Generator
		A 36" particle board disk with a groove routed in the edge serves as the flywheel and crankshaft for the permanent magnet 36 volt DC motor (1 2) seen at the upper right edge of the device.
		The permag motor was probably better then average at power generation, because it was designed to be efficient as a motor.
		The literature from the saw said that the motor was a permanent magnet Bosch electric winch motor, which was a good match for the maximum output of the pedal generator.
	www.los-gatos.ca.us /davidbu/pedgen.html (4009 words)

	WardsAuto.com - PR Newswire Industry News (Site not responding. Last check: 2007-10-09)
		Eaton's heavy duty hybrid propulsion systems are aimed at doubling the fuel efficiency of today's conventional trucks, while maintaining reliability and durability of components and meeting future federal emissions standards for 2007 and beyond.
		UQM Technologies, Inc. is a developer and manufacturer of power dense, high efficiency electric motors, generators and power electronic controllers for the automotive, aerospace, medical, military and industrial markets.
		Important Risk Factors that could cause actual results to differ from those contained in the forward-looking statements are contained in our Form 10-K filed May 26, 2005 which is available through our website at http://www.uqm.com or at http://www.sec.gov.
	www.prnewswire.com /cgi-bin/stories.pl?ACCT=wardsauto.story&STORY=/www/story/07-25-2005/0004073778&EDATE=MON+Jul+25+2005,+08:32+AM (399 words)

	TM4 - Motor wheel, Hybrid motor generator, Permanent magnet generator, Permanent magnet motor (Site not responding. Last check: 2007-10-09)
		TM4 Transport's compact motor-wheel allows packaging flexibility by eliminating the central drive motor and the associated transmission and driveline components in vehicles, including the transmission, the differential, the universal joints and the drive shaft.
		The motor wheel uses a brushless inverted rotor configuration that can be embedded inside a regular-size wheel.
		This motor wheel drive system schematic shows the major components of a typical series-hybrid configuration.
	www.tech-m4.com /eng/tm4transport/moto_wheelmotor (256 words)

	eBay - permanent magnet ..., Industrial Electrical Test, Electrical Solar items on eBay.com (Site not responding. Last check: 2007-10-09)
		Starter - 1997 to 2004 Mustang Permanent magnet starter
		Small Permanent Magnet Motor.5 hp 230 rpm 230 v Castex
		Axial Flux Permanent Magnet Brushless Machines by J....
	search-desc.ebay.com /search/search.dll?query=permanent+magnet+... (508 words)

	Permanent Magnet Motor Suppliers from the PowerSourcing Directory of Permanent Magnet Motor
		Power Sourcing is your best source for finding permanent magnet motor suppliers.
		Source thousands of suppliers, distributors, and manufacturers of permanent magnet motor and all your other needs.
		These are just a few of our permanent magnet motor suppliers.
	www.powersourcing.com /sg/permanentmagnetmotor.htm (400 words)

	MET MOTORS - Minnesota Electric Technology: Permanent Magnet DC Motor Manufacturer
		We are a leading US manufacturer of 3.2, 3.6 and 6 inch permanent magnet DC motors for OEM customers worldwide who require unique design or higher performance and reliability than similar motors found in marketplace.
		Our family of permanent magnet DC motor products offering virtually unlimited flexibility for performance and design to meet your rugged, demanding applications.
		Preliminary design of motor highlight a 4.2 inch diameter, available in 4 standard frame lengths ranging from 3.6" to 7.2", providing a wide range of power from 1/50 HP continuous duty to 1HP intermittent duty, operating at speeds from 400 to 12,000 RPM and voltages of 6 to 250VDC.
	www.metmotors.com (438 words)

	Permanent Magnet Synchronous Motor
		The PM Synchronous motor is a rotating electric machine where the stator is a classic three phase stator like that of an induction motor and the rotor has surface-mounted permanent magnets.
		In this respect, the PM Synchronous motor is equivalent to an induction motor where the air gap magnetic field is produced by a permanent magnet.
		The generated stator flux together with the rotor flux, which is generated by a rotor magnet, defines the torque, and thus speed, of the motor.
	www.freescale.com /webapp/sps/site/overview.jsp?nodeId=02nQXGrrlPZL8l (393 words)

	Bowman Permanent Magnet Motor
		Purportedly ran for 1 year, after which the Alcomax magnets were tested and shown to have not diminished in strength.
		Bowman Motor Open Sourcing Project - Plans posted based on a design that worked for ~3 months before it ran down due to demagnetization of the magnets.
		Bowman Permanent Magnet Motor Derived from Peregrius Motor - John Bedinini posts transcribed version of what is thought to be the first presentation of a permanent magnet motor in 1269, and describes Bowman resurrection of the device in 1954.
	freeenergynews.com /Directory/MagneticMotors/Bowman (394 words)

	Permanent Magnet Motors - Permanent Magnet Motor Manufacturers, Permanent Magnet Motor Factories, Permanent Magnet ... (Site not responding. Last check: 2007-10-09)
		Manufacturer of DC motors, DC gearmotors, micro-motors for control systems, vehicle electric machines and motors, AC motors and motorcycle starters.
		"Alibaba Permanent Magnet Motor" connects you directly to prequalified Permanent Magnet Motor manufacturers and exporters from China and around the world.
		If you are a supplier, factory, manufacturing company or exporter, and want to have more international Buyers, Join Alibaba now to become a Gold Supplier (for Chinese suppliers), or a TrustPass® Member (for suppliers outside mainland China), and have the opportunity to be included here in the featured supplier list!
	hotproducts.alibaba.com /manufacturers-exporters/Permanent_Magnet_Motor.html (244 words)

	Eric's history of Perpetual Motion and Free Energy Machines (Site not responding. Last check: 2007-10-09)
		Robert Johnson's permanent magnet motor got a patent but faded into oblivion.
		, claimed to have invented a cold fusion, laser activated, magnetic motor that produced 525 HP, weighed 475 lbs, and would propel a large truck or bus 100,000 miles on about 2 lbs of deuterium.
		Energie In 2003 this Greek company promised a homopolar magnet (De Palma design) FE design by June of 2003.
	www.phact.org /e/dennis4.html (3186 words)

	PERMANENT MAGNET MOTOR REPAIRS (Site not responding. Last check: 2007-10-09)
		The Mages Permanent Magnet Machine Repair and Maintenance Service covers all rotating and fixed plant up to any physical size.
		All PM Motors can be returned to their original OEM specification or replaced with new or equivalent unit.
		Magnetic Field Measurement capabilities are 0.01 mTesla – 2 Tesla.
	www.mages-group.com /magnet.htm (137 words)

	Stepping Sequences for a Four-Phase Unipolar Permanent Magnet Stepper Motor
		This kind of motor has four coils which, when energised in the correct sequence, cause the permanent magnet attached to the shaft to rotate.
		The excitation of Coil 4 is always the inverse of the excitation of Coil 2.
		So, with the right circuit, you can generate this sequence with only two data lines.
	www.doc.ic.ac.uk /~ih/doc/stepper/control2/sequence.html (265 words)

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