The basic specifications controlling the design of shipboard combat and other systems have been modified in the last few years to require that designers limit the harmonic currents drawn from the shipboard electrical power system. The designers of shipboard equipment are realizing that these requirements have a significant impact on the design of their systems. In many cases, the solution has increased the size and weight of the power supply subsystem to more than twice that of previous designs.
The most common solution to the problem, the use of multipulse transformer rectifiers, impacts the size and weight of systems to the extent that considerable independent research and development (R&D) is being done to find better solutions. There is no better solution known at this time that can be implemented reliably by most contractors. However, there are several promising solutions that, given sufficient R&D effort, may yield better solutions in the near future. Some of these may have been proven but are proprietary and not generally available to designers of Navy shipboard systems.