Maxi Modules Used for UPS Retrofit for Guided-Missile Destroyers
The roles and characteristics of a naval destroyer have changed markedly since World War II. They are much larger — about the size of a WWII cruiser — and independent, no longer needing a destroyer tender. Their firepower is much more lethal than that of any cruiser. Now called guided-missile destroyers, they carry missiles — even with nuclear warheads — that can be launched against air, sea, or land targets. They still, however, retain their anti-submarine and fleet protection roles.
The Vicor customer is a unit of a very well-known company that is better known in the life science marketplace than the military. The application, part of a retrofit program for a guided missile destroyer, was for the modification of an uninterruptible power supply (UPS) for engine control. The original power supply was a discrete design, and one objective of the modification program was to simplify the design process by using component power devices. The use of military COTS components was a requirement.
Two Vicor Maxis were used; one input was 48 V with an output of 28 V. A second input was 28 V with an output of 5 V. The Maxi modules were particularly appealing because they utilize a proprietary spin-fill process to assure void-free encapsulation making them suitable for the harshest environments. M-grade modules permit operating temperatures from –55 to +100ºC. Such modules are subjected to the environmental testing requirements of MIL-STD-810, MIL-S-901, MIL-STD-202, and undergo100% environmental stress screening.
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