BEI Kimco Magnetics’ New Family of Linear Voice Coil Actuators Feature Patented Magnetic Technology, Providing High Safety
and Superior Service Life

November 24, 2008

Vista, CA – BEI Kimco Magnetics, a company of Custom Sensors & Technologies (CST), has introduced a new family of Linear Voice Coil Actuators that provides increased safety and long service life. The new family features two patented spring designs based on magnetic, rather than mechanical technology. This technology ensures constant and precise valve position in either the open or closed setting when electrical power is off. OEMs designing products for safety-critical applications such as medical apparatus and other equipment that depend on maintaining a constant valve setting, will find the new actuators an ideal, low-cost solution.

“Traditionally, mechanical springs have been used to provide a measure of safety for assuring valve position,” explains Mikhail Godkin, BEI Kimco Engineering Manager. “Over time, these mechanical-type springs exhibit wear and tear, resulting in a reduced spring constant that causes undesirable performance deviations.”

The new magnetic designs make use of a mechanical spring unnecessary. Each actuator incorporates either a magnetic ‘extension’ or a magnetic ‘compression’ spring inside a coil assembly. In effect, the entire actuator can be described as a controllable electromagnetic spring whereby the “electromagnetic spring” is controlled by the current in the winding. Both magnetic spring designs also include stops, which limit the position of the moving coil when it is not energized. When the coil is de-energized, it remains in a set, fixed position.

BEI Kimco’s new patented magnetic spring technologies provide “contact-less” actuators, which utilize fewer parts and have no additional friction, eliminating problems associated with wear-related performance while providing better repeatability and longer live. To best meet individual application needs, customers can specify actuator size, stroke force, stall force, peak force, and other key performance requirements, providing an actuator that is completely customized for the end product.

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: sales@beikimco.com.

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 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.www.beikimco.com

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. www.cstsensors.com

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