Magnetics Business & Technology - Summer 2011 - (Page 19)
APPLICATION • COMPONENT DEVELOPMENTS
The Alpha-Core Division of Bridgeport Magnetics Group, Inc. has introduced a line of high power inductors for high frequency applications with a minimum 30 percent size and weight reduction using high performance gapped amorphous ribbon cores instead of conventional cores of silicon steel or powdered iron. Alpha-Core’s new amorphous core power inductors combine high inductance and current levels with low losses at frequencies in the 20 KHz range. High wattage switching mode power supplies benefit from the compact design and much reduced weight. Other applications include power factor correction and harmonics filtering in UPS systems, variable frequency inverters and on-grid solar and wind power systems. Alpha-Core power inductors are box shaped and fully encapsulated in black epoxy resin. The insulation system is class F (155C). The two leads exit from the short end. Initially AlphaCore offers inductance values ranging from 100 uH to 5,000 uH and RMS current ratings up to 60 A. Prices start at $25.00.
Power Inductors for High Frequency Applications
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 400º F. To meet these challenges, BEI Kimco developed a voice coil actuator within the Model LA13-12-000A package. The new design included special Samarium Cobalt (SmCo) magnets and reinforced magnet wire insulation that could withstand high ambient temperatures up to
Voice Coil Actuator Solves Application Requirements for High Temperature Capabilities
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Summer 2011 • Magnetics Business & Technology
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