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PM DC Motors
. In comparison, the most widely used ferrite magnets only have an MEP of 1.8 to 4.5 MGOe. Rare-earth magnets make for small, lightweight motors with up to 50% more torque than ordinary ones having comparable dimensions. This allows a smaller rare-earth motor to do the job of a more expensive and larger
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RC Model Aircraft Motor Control
will describe the design and construction of two small speed controls appropriate for flying model airplanes up to 6 lbs. Many of the control techniques in this application note can easily be used with larger DC motors in different applications. AN847 RC Model Aircraft Motor Control AN847. RC Model
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Motor Selection for Deep Sea Applications
sleds, or ROVs. Among other complications, the motor assemblies had to provide a lot of power, but be very efficient, in order to maximize battery life. On the other hand, the voltage had to be low, so there was no safety hazard to the divers. The system had to be lightweight enough that the divers
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Micro-Stepper Motors Bring Pictures into Focus
necessitate complex mechanics when it comes to adjusting the optics. In order to provide a compact, reliable and light-weight solution, lifeoptics teamed up with FAULHABER Group company Precistep, specialists in micro-stepper motors. The result: high-precision head-mounted vision technology
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Dental Endodontic Obturation Device Incorporates an Electric Motor for Precision and Tactile Control (.pdf)
, longevity is a key. issue, and Aseptico needed to know that the motor not only met their specifications, but would. provide long life as well. When it came to the dispenser motor, the company turned. to Maxon Precision Motor as a supplier. The dispenser. uses a Maxon A-max 16mm DC motor and 16mm 370:1
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Wheel may fly high
/epoxy composites for the flywheel's rotor, low-loss magnets for the bearings, high-speed electric motors and generators for energy conversion, and computer algorithms for motion control. This particular flywheel, enclosed in an aluminum vacuum vessel, consists of a high-speed brushless dc motor, upper
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Getting Swinging Lights to Stop on a Dime
. offering high performance and precision. The EC 90 Flat motor operates fast, and even with sudden,. dramatic movements, can cancel out all unwanted motion in under a few seconds. Maxon motor offers a full line of fractional horsepower. moving coil DC motors and brushless motors ranging in. size from
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The problems of Horsepower Ratings
a variablefrequency ac motor drive to alternatives built with different base speeds, specifically servos, dc drives, and steppers. Their speed ratings can range from 500 rpm for direct-drive systems to 10,000 rpm for universal motors found in sewing machines. It becomes useless to talk about their horsepower output