High-torque steppers: Enhanced-design stepper motors deliver more torque

Enhancing magnets in the stator claimed to provide more than 25% more torque output across the entire speed range.

06/26/2008


 

West Chester, PA Portescap , a Danaher Motion company, introduced a stator-enhanced version of its h3 Series step motors. New h3 models, the company says, feature patented enhancing magnets in the stator to provide in excess of 25% more torque output across the entire speed range compared with original h3 models, which, the company further claims, already deliver up to 40% more torque than traditional hybrid step motors.
“The increased torque is achieved through additional stator magnets that are inserted between each stator tooth. These block the magnetic field from flowing around the stator teeth, which forces more of the magnetic field to flow through each tooth to produce the highest torque output of any hybrid step motor available today,” says Dave Beckstoffer, Portescap product specialist in stepper technologies.
The company says the h3’s high efficiency and performance allows machine builders to reduce the size and weight of their machines by utilizing a smaller motor to deliver the same performance of larger hybrid steppers. This further allows machine builders to use smaller drives, which reduces power requirements and overall system costs. Machine builders using the same size h3 as a standard hybrid will realize increased machine throughput, it claims. As a result, the company says, these RoHS-compliant hybrid step motors are an ideal solution in medical device, semiconductor equipment and laboratory instrumentation applications.
These 1.8are available in NEMA 17, 23 and 34 frame sizes, with various stack lengths available in each frame size. Windings can be customized to suit individual application needs. 
edited by C.G. Masi, senior editor, Control Engineering News Desk
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