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Topic: Brushless DC motor

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	Brushless DC electric motor - Wikipedia, the free encyclopedia
		The poles on the stator of a two-phase BLDC motor.
		In the 'outrunner' configuration, the radial-relationship between the coils and magnets are reversed; the stator coils form the center (core) of the motor, while the permanent magnets spin on an overhanging rotor which surrounds the core.
		In all BLDC motors, the stator-coils are stationary.
	en.wikipedia.org /wiki/Brushless_DC_electric_motor (759 words)

	Composite magnet brushless DC motor - Patent 5440185
		The brushless DC motor of claim 9 wherein said means for preventing comprises at least one spacer coupled to said shaft, said at least one spacer having a surface in contact with a surface of said multi-pole composite magnet.
		The brushless DC motor of claim 25 wherein said means for preventing comprises at least one spacer coupled to said shaft, said at least one spacer having a surface flush to a surface of said multi-pole composite magnet.
		The brushless DC motor comprises a multi-pole, composite magnet which functions as a portion of a rotor, at least one stator member which determines the angular position of this composite magnet, and means for positioning the composite magnet and the stator member on a common axis.
	www.freepatentsonline.com /5440185.html (7417 words)

	brushless dc magnet motor (Site not responding. Last check: 2007-11-02)
		motors and controls international - manufacturer of dc drives, ac inverters both regenerative and 2-quadrant, dc igbt choppers, test stand load machines and dc motors.
		weili motor electrical appliance co.,ltd. - dc motors for use in household appliances xtreme energy - manufacturer of highly-efficient brushless and slotless dc motors.
		a brushless, permanent magnet dc generator is built into the hub of the propeller.
	www.grandesapienza.com /doctypehtmlpublicietfdtdhtml20en (1772 words)

	Maybe You Should Choose A Brushless DC Motor
		The heat-generating part of a brush-type DC motor is the armature winding, in the center of the motor.
		The heat-generating part of a brushless DC motor is the stator winding, which is close to the outside surface of the motor.
		Since it's easier for heat to dissipate from the outside of the motor than from the inside, the thermal resistance of the brushless DC motor is lower.
	ecmweb.com /mag/electric_maybe_choose_brushless/index.html (899 words)

	Permanent magnet brushless DC motor having reduced cogging - Patent 5250867
		The permanent magnet brushless DC motor according to claim 16, wherein the ratio of the number of stator salient poles to the number of rotor magnetic poles is 1.5, and wherein two apertures are disposed within the pole head portion of each salient pole.
		The permanent magnet brushless DC motor according to claim 21, wherein the ratio of the number of stator salient poles to the number of rotor magnetic poles is 1.5, and wherein two apertures are disposed within the pole head portion of each salient pole.
		The brushless DC motor is basically a permanent magnet DC motor, wherein the commutator and brushes of the conventional DC motor have been replaced by electronic switches to perform the commutation.
	www.freepatentsonline.com /5250867.html (5588 words)

	Spotlight on Motors
		The motor driver includes a detachable digital operator unit that serves both as a data input unit and a digital display that can be used up to 16.4 ft away from the installed driver.
		The patented ultrasonic motor design has lower power consumption than miniature electromagnetic motors, according to the company, and can hold its position when the power is turned off, further conserving battery life.
		The housing of the motor is fl to facilitate optimum heat dissipation.
	www.devicelink.com /mpmn/archive/06/03/021.html (565 words)

	Brushless Servo Motor, Brushless DC Servo Motor Repair
		Brushless Servo Motor Repair: All brushless motor repair facilities are not the same.
		If you have ever used a regular servo motor repair shop for brushless servo motor rebuild, you no doubt understand how important it is for the repair facility to have an in-depth understanding of servomotors.
		We are not in the same business as the typical "motor repair shop." We have the experience, specialized test equipment and technical support you need.
	www.servorepair.com /Brushless_Servo_Motor_Repair.htm (210 words)

	Principle of the brushless DC motor
		The brushless DC motor is the combination of a permanent excited synchronous motor and a frequency inverter.
		The commutation of a brushless DC motor depends on the position of the rotor.
		(el.), so the motor produces maximum torque and needs low reactive current - it might be useful to advance commutation by few degrees to compensate the effects of the stray inductance and minimize reactive current.
	www.s-line.de /homepages/bosch/sensorless/node9.html (229 words)

	Featured Article (Site not responding. Last check: 2007-11-02)
		When generating sine waves to a motor, an interrupt routine typically is used to step through a sine table in memory, scale that sine value, and output the result from the PWM generator.
		In a conventional dc motor, this task is performed by the brushes and commutator.
		The rotor of the BLDC motor is aligned by setting the commutation to a known state and applying a small voltage to align the motor.
	www.motorcontrol.com /articles/motslbldc.htm (3908 words)

	Brushless Dc Magnet Motor
		A brushless DC motor (BLDC) is a DC electric motor that uses an electronically-controlled...
		In the DC commutator motor, the current polarity is altered by the commutator and brushes.
		The DC motor is main from the magnetic pole, electricity with change to face the three parts constitute.
	brush.internet-website-marketing.com /3/brushless-dc-magnet-motor.html (645 words)

	Brushless DC motor (Site not responding. Last check: 2007-11-02)
		The brushless DC motor combines many of the advantages of the permanent excited DC motor and the synchronous motor.
		The brushless DC motor needs low reactive current, so similar to the DC motor, the current is proportional to the torque.
		Like the DC motor, the brushless DC motor needs a speed control and a speed sensor.
	www.s-line.de /homepages/bosch/sensorless/node8.html (116 words)

	Infolytica » Gallery » Brushless DC Motor in Motion with Temperature Effects
		The impact of a high operating temperature on the performance of a Brushless DC (BDC) Motor with Interior Permanent Magnets (IPM) is investigated.
		This is an example of a Brushless DC (BDC) Motor with Interior Permanent Magnets (IPM).
		Only the component of J parallel to the motor axis is shown, and since the end windings are perpendicular to this plane they show up in green (zero Jz).
	www.infolytica.com /en/coolstuff/ex0122 (981 words)

	AC VFD for Brushless DC motor control (Site not responding. Last check: 2007-11-02)
		All DC brushless motors are DC motors and the core will get very hot if you run from a vfd,due to the high frequency components present in the VFD output.
		A brushless DC motor can be controlled by a simple variable DC source, instead of a variable frequency/voltage source as in VFD.
		While both induction motors and permanent magnet DC brushless motors run off a 3-phase PWM power stage, that is basically where the similarity ends.
	www.control.com /1026149122/index_html (604 words)

	Motor Generator - Brushless DC Motor (Site not responding. Last check: 2007-11-02)
		The simplest is a standard brushed DC motor as it produces DC voltage that can be used to charge batteries or power circuits with very little electronics needed.
		Other motors such as brushless DC motors or AC induction motors can also be used as generators, but they will produce an AC output which will need converting to DC before it can be used to charge batteries.
		Your DC motor will have two terminals, lets call them A and B. Say you connect +ve to A and -ve to B and the motor turns clockwise, then when you use the motor as a generator; when you turn the motor clockwise A will be the +ve output.
	www.control.com /1026210450/index_html (2101 words)

	Infolytica » Gallery » Brushless DC Motor - Simple Analysis
		Brushless DC Cogging Torque with a Skewed Stator
		The motor is symmetrical every 120 degrees, so with the application of periodic boundary conditions only a third of the model is required.
		For more information on this brushless DC motor consult "A comparison of 2D and 3D analysis methods for the prediction of cogging torque in an electrical machine having skewed slots" in COMPEL Volume 20 Number 2 2001.
	www.infolytica.com /en/coolstuff/ex0050 (410 words)

	Re: modelling of brushless dc motor (Site not responding. Last check: 2007-11-02)
		DC (trapez) brushless is rather a variable structure system and therefore could hardly be described by a single transfer function.
		It explains how to simulate DC brushless making difference between commutational interval (all 3 phases are conducting) and interval between commutations (desirable operation as 2 phases are conducting) as a variable structure system.
		DC bus filter cap PWM stress may be reduced by a suitable PWM co-ordination for different axis.
	yara.ecn.purdue.edu /~smag/msgbrd/msgs/742.751.html (1144 words)

	Motor controller, brushed dc motor, dc motor, brushless dc motor, BLDC motor control, permanent magnet brushless dc ...
		Controls for brushed dc motors, unidirectional brushed DC motors, variable speed control, brushless dc motors, motor drives, variable speed drive, motor speed control, BLDC motor, DC motor, dc motor used in fuel cells, material handling equipment and electric vehicles.
		Drives a brushed or other DC motor used in fuel cells, cooling applications, material handling equipment and electric vehicles.
		In electric fan drive applications, a loss of CAN bus communications has the controller output operate at a default value that turns on the motor to allow a cooling fan to operate until communications are re-established or a time-out period elapses.
	www.axiomatic.com /dc-motor.html (378 words)

	Mixed-Signal ICs - Brushless DC Motor Applications (Site not responding. Last check: 2007-11-02)
		Brushless DC motors are normally driven using a three-phase bridge.
		A commutation pattern is used to select which of the six transistors are used.
		Example 4 of AN191 - Motor Control Software Examples provides a simple example of brushless DC motor control using the C8051F330 MCU.
	www2.silabs.com /tgwWebApp/public/web_content/products/Microcontrollers/en/motor_bldc.htm (93 words)

	Brushless DC motor question - HobbyTalk
		With the current brushless motors, the switching (AC) is done in the motor controller and fed to the motor in a series of wiring that can power on and off coils inside the motor can to spin the magnetic armature.
		Your battery providing the DC current to the controller, which generates the AC signal for the Brushless motor.
		Brushless systems are more torque, similar top end RPM, far less maintenance, less money overall, smooth running, and more efficient then brushed motors.
	www.hobbytalk.com /bbs1/showthread.php?t=80071 (458 words)

	Motor controller, brushless dc motor, ac motor drive, BLDC motor control, permanent magnet brushless dc motor, DC ...
		Motor controller, brushless dc motor, ac motor drive, BLDC motor control, permanent magnet brushless dc motor, DC motor, variable speed drive, VSD, motor driver, motor drive, fuel cell, electric vehicle, CAN bus, CANopen, SAE J1939, servo motor control, material handling equipment
		Controls for brushless dc motors, motor drives, variable speed drive, motor speed control, BLDC motor, DC motor, ac motor, dc motor used in fuel cells, material handling equipment and electric vehicles.
		Monitors the RPM of the motor and transmits this information at constant intervals to the CAN bus.
	www.axiomatic.com /bldc-motor.html (231 words)

	brushless dc magnet motor research (Site not responding. Last check: 2007-11-02)
		Brushless Dc Magnet Motor: “A searcher can end up investing way too much time on the wrong search techniques.
		And specifying motors the book provides details of brushless DC and synchronous motors as well as both radial Design of a Brushless permanent magnet Dc motor".
		The Problem is that Therefore this motor is becoming increasingly popular in industrial drive applications.
	www.boating-lights.info /dcmotors/brushless-dc-magnet-motor.htm (324 words)

	Brushless Dc Motor
		A brushless DC (BLDC) motor is a rotating electric machine where the stator is...
		the contrary, in the brushless DC motor, the polarity reversal is performed...
		and stepper motors lies the realm of the brushless DC motor.
	brush.internet-website-marketing.com /3/brushless-dc-motor.html (560 words)

	Cdrom motors (Site not responding. Last check: 2007-11-02)
		The motor must be removed, the three screws you see are very small, 0 Philips size screws on this one.
		In particular, check the motor shaft size, it is often the same size as the slider shaft for the optical system, 3mm, which can be used to make a longer motor shaft if required.
		Further info on this motor: I chipped out the magnet which had been rubbing on the stator, and also cleaned up the outside of the stator with wet/dry paper.
	homepages.enterprise.net /jayjay/cdrom_motors.htm (2099 words)

	Dc Motor (Site not responding. Last check: 2007-11-02)
		FA: 120V DC motor, rated 2.65 HP this motor is one of those treadmill motors that is often used to power a small lathe or other tool wihere an inexpensive variable speed motor is needed.
		These unique designs, solid state PWM, unidirectional DC Motor Speed Controls are ideal for power winch equipment, and all battery-operated applications that require adjustable speed of a DC motor or Gear Motor.
		Brushless DC Motor is designed for low voltage applications.
	dcmotor.qaidmotor.com (2050 words)

	motor brushless (Site not responding. Last check: 2007-11-02)
		the brushless ac motors eliminate the time-consuming and expensive maintenance associated with dc motors and the possibility of contaminants entering the motor...
		The LEU Series is a brushless motor with an overall width of just 18mm yet it develops 18kgf (39 Ibf) of peak force making it the smallest motor of its power...
		The brushless DC motor (which can deliver up to 125Nm peak torque and 55kW (74bhp) peak power in other applications) is calibrated to produce 120Nm peak torque...
	www.motori-brushless.it (423 words)

	Economical brushless DC motor drive - Motion Control in SA
		Maxon Motor's new DC 70/10 speed controller was specifically developed for the upper performance range where it can control electronically commutated DC motors of up to 700 W. The 4-quadrant controller needs no additional encoder, just the motor's own Hall sensor signals.
		This robust controller has an input voltage range of 10-70 V d.c and a 10 A current in continuous operation that can rise to 20 A intermittently; it is also highly flexible when combined with different types of power supplies and motors.
		Complete with motor choke, the controller is fitted in compact aluminium casing that is smaller than a postcard.
	motioncontrol.co.za /news.asp?pklNewsID=18799&pklIssueID=506&pklCategoryID=358 (445 words)

	Brushless DC Motors (Site not responding. Last check: 2007-11-02)
		The typical "inside-out" brushless DC (BLDC) motor provides greater output power, higher operating speeds and cleaner, quieter operation than its brush-type counterparts.
		BLDC motors are ideal for sterile environments—since there are no brushes, no particulate is discharged.
		Choose a motor that you wish to modify by clicking on the part number, the "more here" button, or use the easy drop down selection.
	www.beikimco.com /company/motors3.php (162 words)

	Brushless DC Motor Speed Control offers custom settings., Dart Controls, Inc. (Site not responding. Last check: 2007-11-02)
		The 703BDC-PA is a continuation of Dart Control’s line of versatile brushless DC motor speed controls, offering greater customization at economical costs.
		Oct 27, 2004 - DC Motor Speed Control operates at 18 kHz.
		Jul 2, 2002 - Motor Drives control brushless dc motors.
	news.thomasnet.com /fullstory/462024 (751 words)

	Brushless DC Servo Motor features D-sub connector., Animatics Corp. (Site not responding. Last check: 2007-11-02)
		May 20, 2005 - Brushless DC Kit Motor features smooth operation.
		Mar 14, 2005 - Brushless DC Motor is designed for low voltage applications.
		Sep 1, 2004 - Brushless DC Motor has outside rotor.
	news.thomasnet.com /fullstory/459210 (645 words)

	Microbeam - Sensorless Brushless DC Motor Drive
		Applications needing speed and or torque control while the motor is rotating and have limited load at startup are espescially well adapted for a sensorless drive.
		Microbeam is skilled in motor drives using FPGA digital logic combined with analog electronic circuits that can be transered to an integrated circuit designer to provide the customer with a low IC count, low cost solution.
		The electronic drive can be delivered as a standalone PCB board or schematics to be integrated into the customer's design, and may be implemented to control up to 2 brushless motors with additional DC motors and/or stepper motors, as well as other logic needed for a complete system.
	www.microbeam.ch /sensorlessbldc.html (399 words)

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