Power Dense Single Core Three-Phase Transformer

Diversified Technologies, Inc., (DTI) proposes to develop a compact, lightweight 112.5 kVA militarized isolation transformer for suitable Navy shipboard vital loads. In Phase I, DTI and our subcontractor Neeltran, Inc. will design a complete 60 Hz, 440 VAC, 112.5 kVA isolation transformer as specified, including the protective cabinetry weight, and work with the Navy on a new 150 kVA transformer specification and design. The design will be ruggedized for military usage and optimized for increased power density on weight and volume bases and reduced losses. In addition, the transformer will have improved fault-current performance with reduced stray magnetic fields. In the Phase I Option, DTI and Neeltran will fabricate, demonstrate, and test two full-scale 112.5 kVA transformers of the optimized design. The main Phase I technical objective is to reduce the size and weight of single-core three-phase transformers for use within shipboard power distribution systems. DTI has a long history of developing advanced power electronics systems for the Navy and has extensive capabilities in electromagnetics design, which forms a key element of our power electronics capabilities. Transformer technology is relatively stable and yet new and challenging applications of transformers occur every day. These challenges are met and exceeded with improvements in materials technology along with sophisticated computational analyses and plain, old American ingenuity and practicality. Diversified Technologies, Inc. (DTI) has had four relevant MIL-SPEC programs (including two products as critical components now deployed on submarines and aircraft carriers, each with unit volume of approximately 100-units), three relevant Phase III success programs, three relevant high-power density and low SWaP (Size, Weight and Power) programs, three relevant pulse transformer programs, and one relevant 25-year high-reliability undersea program. Each of the eleven separate referenced programs (some qualify as duplicates) demonstrate that excellence in magnetics is a “core” capability at DTI.