Rhasor looks like a nice unit to get in tight spaces for the production even so very small but at least itīs low RPM
and Kubota seems like a reliable name.
Have no experience with electro drive and until for construction of a new boat I donīt see it practical to convert a diesel powered boat to electro drive.
But I see some positive aspects for boat building to it.
For example the electrodrive has a very low foot print and can fit any where in the bilge
. Also I have seen units that are outside of the hull for the cooling
of the motor. The unit is mounted on a shaft that goes on or through the hull that also serves as very effective steering
. These units also can be retracted while not in use wich would make them less succeptable to plant growth etc. and all the hassle of maintanance that comes with it.
I think one of the biggest atvantages is the gain of the space of the engine room because the generator can be on any conveniant location on the boat. That should also have positive features on noise
and vibration levels.
That should open up a total new spectrum in space lay out on boats
Another positive factor is they bring the max torque right from the start and through out the whole spec of RPM wich should be very positive for prop design. All of that should lead to a more effecient use of KW produced from the diesel generator.
As far as control of DC or AC motors, I beleave there has been made lots of progress and I donīt see this an issue at all
Another thing I really like with a generator as prime source everything on board would run on electricity NO more gas bottles wich is very clean and the instalation is very easy. With a right sized Lithium pack I also beleave the generator would not have to run all the time.
, well just another small unit that is also used if more power is requiered for peaks
In case of service
the whole and compact unit is just disconected and hauled out to any conveniant shop / location and nothing of the marine price
In case of a new design I could see myself seriously considering