Variable Speed Drive

Problem: Current high demand pumps such as firemain supply run only "on/off" which causes low efficiency, piping erosion and system stress.

Solution: VSDs represent the future for motor control. They run pumps only at speeds that are required, use less energy and reduce fluid system stress, wear and erosion. VSDs continue to become smaller, lighter and more cost effective. They pave the way for new high-torque motors.

Benefits

Estimated Navy Cost Avoidance:

Minimum annual:         $7,016 K

Minimum 15 Year:   $105,240 K

Fleet Impact: The use of VSDs will provide significant maintenance reduction through greater piping reliability and lower electrical system stress caused by motor start-ups and inefficiencies. Combined with linear output motors, VSDs will become a major component of an all-electric ship.

Status: Pending

Upon award of contract to NAVSEA/Philadelphia, they will install VSDs on CVN-68 class ships for operational testing.

Applications:

Surface Ship, Aircraft Carrier and Submarine motor-pump systems. Extension is likely to other motor applications