Defense

Increasing the Power and Efficiency of VME Solutions

November 9, 2011
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Aegis Power Systems, a Vicor Custom Design Center has released a new VME550 Series of rugged, reliable power supplies.

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New FIAM Family Product for Defense Applications

October 4, 2011
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New FIAM Family Product for Defense Applications

Vicor’s Filtered Input Attenuator Modules (FIAMs) are designed for power systems engineers needing front-end EMC filtering and transient protection without incurring excessive costs, delay or demands on space. The FIAM family has just been extended for defense applications by the addition of the MIL-COTS 28Vin M-FIAM7B. This new device, like the existing FIAMs, provides EMC filtering, transient protection and inrush current limiting, to meet relevant MIL Standards. The M-FIAM7B is compatible with 28 VDC V•I Chip and VI BRICK modules. The M-FIAM7B, which uses active clamping, is qualified to MIL-STD-1275A/B/D for transient spike and...

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MIL-COTS Bus Converter Module Reduces System Size and Weight

June 25, 2011
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MIL-COTS Bus Converter Module Reduces System Size and Weight

Military aircraft and ships typically use an isolated 270 VDC power distribution system, specified to MIL-STD-740E/F. However the equipment it supplies, such as radar, processors, radio, satellite and GPS all requires lower regulated or unregulated DC voltages. Vicor’s new high-efficiency, non-regulated MIL-COTS BCM bus converter MBCM270F450M270A00 operates from 270 VDC power and is fully MIL-STD-740E/F compliant. It provides a nominal 45 VDC output with better than 96% efficiency and over 800 W/in³ power density. Minimising equipment size and weight, while maintaining power capacity, is always a primary concern within mobile military applications, whether air,...

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New High-efficiency MIL-COTS Bus Converter

March 8, 2011
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Just introduced is a high-efficiency, non-regulated MIL-COTS BCM™ bus converter to complete a family of V•I Chip™ power components for airborne, naval and land-based applications. Operating from the typical 270VDC (230-330V) MIL-STD-704E/F power rail, with around ¼ inch low profile and ½ ounce weight. Read press release

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New MIL-COTS VI Brick Filter adds MIL-STD transient and EMI compliance to power conversion design

September 16, 2010
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New MIL-COTS VI Brick Filter adds MIL-STD transient and EMI compliance to power conversion design

Vicor’s new MIL-COTS VI Brick Filter provides a transient and EMI filtering DC front end to protect MIL-COTS power conversion systems, which complies with stringent military standards. It is available either as a stand-alone filter, or as an integrated Filter/PRM Regulator Module. Substantially smaller than competing products with similar power ratings, both versions of the MIL-COTS VI Brick Filter provide compliance with MIL-STD-1275A/B/D for transients, and MIL-STD-461E/F for EMI conducted emission and conducted susceptibility. The stand-alone Filter also complies with MIL-STD-704A/E/F for input transients, while the Filter/PRM Module complies with MIL-STD-704A-F. Both versions of...

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Meeting Military Aircraft Electrical Specifications

February 8, 2009
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Meeting Military Aircraft Electrical Specifications

MIL-STD-704* came into being to standardize aircraft electrical requirements for the armed services. Since 1959 there have been a number of modifications to this basic specification, with the latest, MIL-STD-704F, being introduced in 2004. Initially MIL-STD-704 limited itself to two basic voltage buses, a three-phase 115Vac (typically 400Hz) supply with limited single-phase loading and a 28V DC system. Over the years there have been many changes in the surge and transient withstand levels, particularly for the 28Vdc rail and the introduction of a 270Vdc bus. Vicor manufactures parts to meet most of these requirements....

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EMI Filters Used in Military Vehicle Radios

April 7, 2008
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EMI Filters Used in Military Vehicle Radios

The reliability and compact packages of Vicor Picor modules were key considerations for a Vicor customer in Turkey. The Picor modules are being used to achieve low EMI by reducing switching noise at the converter input, and to reduce the ripple currents at the output of the converter, in multi-band, multi-mode radios designed for use in tactical military vehicles. The QPI family of active EMI filters provides conducted common-mode (CM) and differential-mode (DM) attenuation from 150 kHz to 30 MHz in the CISPR22 range. The proprietary active filtering circuit provides superior attenuation at low...

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