| | | There are several electrically driven executions. The revolutions can be controlled by means of a frequency converter for boats, an electrical shaft or by means of a rotary resistance. In the schedule on the left an example of a Veth-Jet with a frequency controlled e-motor is shown. In this situation the same frequency converter is also used to control a loading pump for boats of a tanker. When the generator, during bow drive use, does not have to drive any other consumers then an electric shaft drive can be an option. This is an economically interesting solution in which the revolutions are controlled by the boat diesel engine of the marine generator set. Another solution is to use a rotor resistance controller to drive a slip ring motor. Rpm is normally controlled in that case in 3 steps: 70%, 85% and 100% of the maximum revolutions. Veth Motoren has a great expertise and experience with all these systems and can advise the best solution for every situation. | | |