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BEI Kimco Magnetics, a company of Custom Sensors & Technologies (CST) Inc., recently met the challenging voice coil actuator requirements for a high temperature spectrometer application. The device is used to identify materials in a given sample based on its spectral lines and operates under severe conditions.

Key to the customer's product design specification was a voice coil actuator that would deliver consistent and reliable performance while operating in a harsh environment under extreme temperatures. In this application, the voice coil actuator is used to move a mirror at high frequency, causing the laser beam to dither. The actuator needed to perform at an ambient temperature of 400ºF.

To meet these challenges, BEI Kimco developed a voice coil actuator within the Model LA13-12-000A package. The design included special Samarium Cobalt (SmCo) magnets and reinforced magnet wire insulation that could withstand high ambient temperatures up to 400ºF, a continuous stall force of 0.49 lb., and a total stroke of 0.25 inches.

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