Long time since last post, managed to get the flu real bad so I was down for two weeks. Missed the opportunity to work with the boat during easter break, so suddenly I was in a hurry to just get the motor working in the boat before todays launching. Washing and painting was kept at a minimum, no polishing at all... And the electric installation got quick and dirty just to make sure it worked. Looks like a mess: Here you see (from right to left) the motor, the controller, a watt meter for the motor, a 150 A circuit breaker, a 48 V to 12 V switching DC converter, a watt meter for the 12 V system. Yes messy, but, it works!
(I will improve this) The motor runs fine, no vibrations in the coupling. So boat goes in the water, will the power be enough? Well, first experience is that I got forward and reverse mixed up. OK, just to try to turn the throttle backwards to go forward, no problem. Motor is quiet and smooth to drive. When I reach free water, I try some more throttle and easily goes up to 5 knots. I slow down and go down to make sure nothing is getting overheated (the water cooling is not installed yet), but all is cold. So up again and see how fast we can go. 6 knots without sweat, nice! I let it run at 2 knots and check the watt meter, 500 W. So 10% throttle give 2 knots, promising. I drive around for 10-15 minutes before I lay to in our harbor. Watt meter reports a 3 Ah consumption. Is there a Noble Prize for environmental technology? :)
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Staffan RolfssonMy hobby project, converting our sailing yacht Pilsner (IMS-33 one-off) from diesel to electric drive. Archives
August 2016
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