BEI Kimco Magnetics Solves Challenging Application Requirements

for High Torque Density Motor Capable of Supporting Axially Translated Loads of 1,000 Pounds

VISTA, Calif. − BEI Kimco Magnetics, a company of Custom Sensors & Technologies (CST), Inc., recently met the challenging high-performance motor requirements for a new, all-electric actuator targeting power generation control applications for gas turbine engines. The Kimco motor development supported the customer's goal to replace aging and more costly pneumatic and hydraulic technologies with improved all-electric designs. In this instance, the product would provide an alternative for fuel metering, guide vane, and precision valve control for industrial, marine, and military applications.

Key to the actuator design was a highly reliable, compact BLDC motor capable of supporting axially translated loads of 1,000 lbs. on a continuous basis. The motor would be required to drive the axial load at velocities of 10.0 inches per second with positioning accuracies of better than +/- 1.0%. Another important requirement was reliable operational performance at ambient temperatures of up to 125 degrees C.

To meet these stringent requirements, BEI Kimco developed a Frameless High Torque Density Motor (Model DIP43-32-HPZA) measuring only 4.3" in diameter x 3.2" in axial length. This rotor/stator part set, or "frameless" configuration, allows the motor rotor to be directly coupled to the load, resulting in improved operating efficiencies, reduced parts count and an extremely small package size that met the customer size constraints. Select, high energy product rare earth magnets were utilized to achieve exceptional torque stability at the operating temperature extremes. Thermal sensors embedded in the motor windings supply temperature data to the customer's external fault/health monitoring system, and a stainless steel sleeve encases the permanent magnets for added structural support and security.

"When you consider the envelope constraints, it's really amazing that the motor is able to develop enough linear force to drive loads approaching 1000 lbs.," says Walter Smith, BEI Kimco's Senior Applications Engineer/Project Manager for Motors. "Just visualize an actuator that is capable of lifting three full-grown people and you have a clear picture of its capabilities. - that's an extremely high torque density for such a small package."

BEI Kimco motors have been used successfully in countless mission-critical applications from high-end industrial, to military and aerospace to medical applications. The ability to provide high-performance solutions tailored to the specific needs of the customer has allowed Kimco to consistently fulfill unique and challenging OEM requirements.

For further information contact BEI Kimco Magnetics, 2470 Coral Street, Bldg. D, Vista, CA 92081-8430, USA, Tel: (760) 597-7042; Toll-free: (800) 572-7560; Fax: (760) 597-6320; email:;

About BEI Kimco Magnetics

BEI Kimco Magnetics is an operation of Custom Sensors & Technologies (CST). BEI Kimco Magnetics was founded in 1974 and specializes in rotary and linear motion control products. The company's precision motion control products include high-speed performance Brushless DC motors, Cylindrical and Flat Voice Coil Actuators, and Linear Motors. These products are used across a wide range of applications including medical and scientific, factory and office automation, optics, semiconductor/electronics, military, aviation, space systems, and security. Kimco merges leading-edge capabilities and cost-effective manufacturing know-how with highly customized applications expertise.

About Custom Sensors & Technologies

Headquartered in Moorpark, CA - Custom Sensors & Technologies (CST) is comprised of industry-leading brands including Crouzet, Kavlico, Crydom, and former divisions of BEI Technologies - Newall and Systron Donner. CST provides sensors, controls, and actuation products for the Transportation, Industrial and Aerospace & Defense markets.

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