The use of variable frequency drives for pumpset motors offers significant advantages for ship steering applications. With a VFD motor pumpset, the steering can be ramped up to speed over the first and last 5 degrees of rotation to allow precise rudder positioning with no hydraulic shock.
VFD motor drives have the following advantages over constant running directional or servo valve pumpsets:
1. Major reduction in electrical demand since the motor and pump only turn when a rudder angle change is underway.
2. Major reduction in heat generation and consequent heat dissipation requirements due to the l...