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Topic: Induction motor

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	Induction Motors
		Induction motors use shorted wire loops on a rotating armature and obtain their torque from currents induced in these loops by the changing magnetic field produced in the stator (stationary) coils.
		Induction motor action involves induced currents in coils on the rotating armature.
		A large percentage of small AC motors are classed as induction motors.
	hyperphysics.phy-astr.gsu.edu /hbase/magnetic/indmot.html (195 words)

	single phase induction motor,single phase electric motor manufacturer and single phase induction motors,single phase ...
		As a professional single phase induction motors, single phase electric motors manufacturer, exporter, supplier and factory in China.--Zhejiang Dasu Electric Machinery Stock Co.,Ltd. specializes in the production of various kinds of medium and small electric motors, single phase induction motor, single phase electric motor.
		This series motor is designed and manufactured according to the national standard.
		The motor is widely used in pump and machinery with ligh-load starting.
	dasumotor.chinese-suppliers.com /a_yy_single_value_capalitor_single_phase_induction_motor.htm (261 words)

	Power Output of A.C Induction Machines
		Thus the power output of a motor may be specified completely on the basis of the slip frequency providing the motor is operating at the standard excitation of 50 c.p.s., 30, 415 v.a.c.
		motor may be accurately measured with a tachometer used in conjunction with a set of curves of slip vs power output supplied by the motor manufacturer.
		In motor sizes under 10 Hp, increased rotor slip and heating, and additional heating of the stator may not be noticed because no comparisons are made and the benefits of variable speed control outweigh the (possible) considerable reduction of efficiency.
	depalma.pair.com /Absurdity/Absurdity12/ACInduction.html (819 words)

	INDUCTION MOTOR
		Recall that the stator of an AC motor is a hollow cylinder in which coils of insulated wire are inserted.
		A major difference between the wound rotor motor and the squirrel cage rotor is the conductors of the wound rotor consist of wound coils instead of bars.
		The synchronous motor is not an induction motor.
	www.geocities.com /vijayakumar777/inductionmotor/inductionmotor.html (2738 words)

	Heaters And Trickle Voltage Heating
		The Induction Generator may be used as a motor to accelerate the system to running speed, or the prime mover may be used to provide the acceleration.
		For a motor, the air gap voltage is typically 85-95 percent of the terminal voltage.
		Induction Generators should be rated for the nominal system voltage, or slightly higher rather than lower, because the generator is now the power source rather than being a load on the power system.
	www.usmotors.com /products/profacts/1-204.htm (1139 words)

	Rockwell Automation - Reliance Electric -Induction Motors B-7097-2
		While AC motors were initially applied to relatively simple variable speed applications (such as varying the flow rate of a fan or pump), advances in AC motors and control technology have allowed their use in higher performance applications.
		As the frequency supplied to an AC induction motor is increased (with voltage held constant), the "field weakening" causes a reduction in the motor peak torque capability as seen in Figure 10.
		While motors are often not thought of as having a characteristic capacitance, there are both phase to ground as well as phase to phase capacitances associated with AC induction motors.
	www.reliance.com /prodserv/motgen/b7097_2.htm (3460 words)

	Motor Formulas
		Full-load motor torque is calculated to determine the required braking torque of a motor.
		This is because the synchronous speed of an induction motor is based on the supply frequency and the number of poles in the motor winding.
		Motor are designed for 60 hz use have synchronous speeds of 3600, 1800, 1200, 900, 720, 600, 514, and 450 rpm.
	www.elec-toolbox.com /Formulas/Motor/mtrform.htm (632 words)

	Commercial Energy Efficiency - Optimization of a Single-Phase Induction Motor Drive
		The operating efficiency of a single-phase induction motor decreases dramatically as the load on the motor decreases when the voltage applied to the motor remains constant.
		Applications where the motor operates at light load levels for extended periods of time are the most likely to economically benefit from motor control.
		Induction motors are designed to operate at their greatest efficiency when the mechanical load is near the full-load rating of the motor.
	www.energy.iastate.edu /efficiency/commercial/cs/cs-motor_drive.html (511 words)

	Understanding motor speed
		Four pole designs are the most common pole configuration for AC induction motors and are typically found in belted applications such as blowers, fans, air-handling equipment, compressors, commercial garage door openers, and conveyors.
		These motors operate at 900 RPM unloaded (between 800 and 875 RPM loaded) and are being used more extensively today in room air conditioning, outdoor heat pump, and residential garage door openers.
		This motor, which runs at 600 RPM unloaded, is used in washing machines and other equipment that require a slow cycle.
	www.aosmithmotors.com /html/motorDoctor/Understandingmotorspeed.htm (695 words)

	Induction Motor Manufacturer from India.
		Single phase Shamruthi Induction motors are suitable for 220 V = 10%,50 HZ = 5% supply.For combination of voltage and frequency, maximum variation of 10% is allowed.
		As the standard motors are already designed to work under varying temperatures and their ability to work at variable altitudes makes then suitable for industries across the globe.
		Mounting of Shamruthi Induction motors plays a vital part in the design of motors and their ability to continuously work under stressful conditions and also their ability to withstand vibrations.
	www.praneengineerings.com /inductionmotors.htm (1075 words)

	Minimizing AC Induction Motor Slip
		Motor torque is developed from the interaction of currents that flow in the rotor bars and the stator's rotating magnetic field.
		Reluctance motors are also used, but their output/weight ratio isn't very good, so they're less competitive than the squirrel cage induction motor.
		Instead of oversizing the motors to eliminate the speed error caused by slip, it may be better to use sectional drive line-ups with separate inverters for each individual motor.
	ecmweb.com /mag/electric_minimizing_ac_induction (1311 words)

	Peak torque per ampere method for induction motor vector control - Patent 6377019
		Generally, in vector control of an induction motor, the electric currents in the phases of the motor (i.e., three phases in three-phase motor), are resolved into one "direct-axis" current, i.sub.d, and one "quadrature-axis" current, i.sub.q.
		According to the method of the present invention, the motor system is operating at peak torque, and consuming the least amount of power by setting the flux current as a function of the rotor resistance, rotor inductance, and torque current, and maintaining an unchanging slip frequency.
		Feedback signals 34 from the induction motor 12 to the motor controller 26 include such variables as actual currents in the phases 20, 22, and 24 and the rotational position or speed of the rotor of the induction motor 12.
	www.freepatentsonline.com /6377019.html (1978 words)

	Induction Motors
		Because the induction motor works by magnetic repulsion rather than attraction like the synchronous motor, it has been called a "repulsion induction" motor.
		As soon as any load is applied to the motor the speed is reduced, causing the rotor bars to cut the magnetic lines of force of the stator field, and creating the repulsion force in the rotor.
		The induced magnetic field in the rotor migrates around in the direction of the rotation, and the speed of this migration is dependent on the applied load.
	www.dliengineering.com /vibman/inductionmotors.htm (213 words)

	Determining speed for AC induction motors
		One way to determine that you are making good replacements in the field is to understand the concept of motor speed so that you can match the speed of one AC induction motor to another.
		Motors of this speed are commonly found in belted applications such as blowers, fans, air-handling equipment, compressors, and some conveyors.
		Less-common pole configurations include 12-pole motors (600 RPM) that are used in applications requiring slow speeds, such as washing machines, and 16-pole motors (450 RPM unloaded), often found in ceiling fans.
	www.aosmithmotors.com /html/motorDoctor/Determiningspeed.htm (845 words)

	Oriental Washdown Induction Motor
		The new AC induction motor from Oriental Motor USA Corp. incorporates a non-porous aluminum die casting for both motor and gearhead.
		These AC motors can be supplied with a range of gearheads with ratios between 3.6: 1 to 180: 1.
		This special purpose induction motor family can withstand a continuous stream of jetted water against all motor and gearhead surfaces.
	www.icsonline.net /FP1425AA.htm (234 words)

	AC induction IEC motor ( High efficiency included)
		The general AC induction electric motors are designed with IEC standard.
		These motors fit a variety of industrial applications and it is convenience for new and used applications.
		These motors are designed to meet high efficiency standard in varied-countries.
	www.adlee.com /ac_induction_iec_motor.htm (59 words)

	Electric motor - Wikipedia, the free encyclopedia
		A permanent magnet motor is the same as the conventional dc motor except the fact that the field winding is replaced by permanent magnets.
		In this motor, the mechanical "rotating switch" or commutator/brushgear assembly is replaced by an external electronic switch synchronised to the rotor's position.
		These motors are used extensively in electric radio-controlled vehicles, and referred to by modelists as outrunner motors (since the magnets are on the outside).
	en.wikipedia.org /wiki/Induction_motor (7382 words)

	Induction Generator
		These motors are often called "squirrel cage motors" and are in washing machines, dryers, water pumps and other devices too numerous to mention.
		A motor converted to an induction generator will not start another squirrel cage motor unless that motor is about 1/10 of the horsepower of the induction generator.
		I've only found one motor that would not consistantly generate (out of a dozen or so that I've tried over the years) and it was one with a bunch of wiring coming out of it; it may have been a multi-speed AC motor.
	www.qsl.net /ns8o/Induction_Generator.html (1922 words)

	Some Rotational Measurements of a 3-Phase Induction Motor
		The motor was connected to a gear box (5:1 gear ratio) which was driving a large inertial load.
		A spring loaded capstan/encoder assembly was placed against the motor coupling and gearbox output shaft to sense the position, velocity and acceleration of the motor and output shaft respectively.
		SensorPlot™ was used to monitor the shaft velocities of the motor and the output of the gearbox.
	www.euclidres.com /apps/induction_motor/motor.html (527 words)

	Induction Motor Model and Sample Results
		The simulation of the induction motor, is conveniently accomplished by solving for the flux linkages per second in terms of the voltages applied to the machine.
		The induction motor is, of course, an electromechanical device so the model also requires expressions for the electromagnetic torque and the speed of the machine.
		It would be difficult, if not impossible, to measure the rotor currents in a squirrel-cage induction motor, but they are obtainable (referenced to the stator) from the model.
	www.ewh.ieee.org /soc/es/Nov1998/08/INDMOTOR.HTM (1319 words)

	Demonstration Equipment
		The bar magnets on the motor serve to attract and repel the induced magnetic field in the wire.
		This is a conversion of electrical energy (from the battery) to mechanical energy (the motor moving).
		Each of the two clips are attached to the motor and to the 6V battery.
	www.csun.edu /scied/1-demo/induction_motor/index.htm (312 words)

	ORIENTAL MOTOR AC Motors & Gearmotors - Induction, Reversible, Synchronous, Torque, Watertight, Clutch & Brake, ...
		The outward appearance is the same as that of induction motors, however, these motors are suited for applications where the motor must frequently switch direction.
		There are two basic types of AC motors; standard induction motors that run continuously and reversible motors that allow for bi-directional operation.
		These types of motors include: electromagnetic brake motors to hold loads in a power-off situation; clutch and brake motors for quick starts and stops; synchronous motors for a fixed speed in synchronization with the power frequency; and torque motors for tension control and winding applications.
	www.orientalmotor.com /products/ac-motors/index.htm (495 words)

	INDUCTION MOTOR (Site not responding. Last check: )
		induction motor program the parameters of the equivalent circuit can be entered on the circuit diagram.
		This module demonstrates the torque versus speed characteristics of a three-phase induction motor.Draw the exact equivalent circuit of the motor and observe the effects of changing various parameters on the torque versus speed curve.
		There is a list of parameters of the induction motor that can be cahnged by clicking on the values and editing them to the desired values.
	www.geocities.com /cindulkar/notes3.html (425 words)

	Permanent Magnet Vs. Induction Motors
		A common problem with induction motors is that they have a starting winding and running winding.
		WasteMaid disposers motors are almost twice as fast (2600-2800 RPM) as the induction motors (1400 RPM) units.
		The speed of the motor combined with the design of the grinding chamber results in a faster grinding time than the induction motor disposers.
	www.joneca.com /permanent_magnet_vs__induction.html (1272 words)

	Motor, Three-phase Induction Motor, Single-phase Induction Motor - Fenghua Xikou Anling Motor Factory
		Motor, Three-phase Induction Motor, Single-phase Induction Motor - Fenghua Xikou Anling Motor Factory
		This factory located the Xikou Town Fenghua County away from Ningbo City 35 KM.
		This factory is appointed to manufacture micro electrical motors by the State Commission of Machinery lndustry.
	www.chinaanling.com (69 words)

	Induction Motor On B2BManufactures.Com from China & Taiwan Induction Motors Manufacturers & China Induction Motor ...
		Induction Motor - Shuenn Farn Ventilator Industry Co., Ltd.
		Induction Motor - Hao Thing Electricity Machinery Co., Ltd.
		Induction Motor - Lung I Electric Co., Ltd.
	www.manufacturers.com.tw /industrial-supply/Induction-Motors.html (475 words)

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