I question the statement of "loss" associated with belt drive. Our engineering indicates that is not the case. The transfer of power from one shaft to another using new technology toothed (timing belts) is close to 100%. When you measure at the motor shaft and at the propulsion shaft the is born out. There is no measurable heat generated by the belt system.
There is about a 15% to 18% loss of power from the power going into the system to the power at the shaft, but that is understood to be the nature of the electric motor and is seen as heat. This loss is from both the motor and the controller. We see this loss common to PMAC, AC induction, and DC motors over the typical power draws used in marine propulsion.
Mike
Electric Yacht of Southern California/Pacific.
Posted by: mike@electricyachtssocal.com
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