T-Pain Is On A Boat: Re: [Electric Boats] lower unit noise

Sunday, September 6, 2015

Re: [Electric Boats] lower unit noise - New type of motor

That was what I found, thanks for your input. When pulled, we found that same noise, and as I mentioned – only 1 of five washers, and that bowed and rusty. Rebuild under way, thanks so much for your pointed comment. I might like your motor too, but I need to hook with the extra $$ controllers from Golden Motor. I plan some stuff with their motor (in house now), in the six hp range.

Best Wishes, ---- Cal

From: mailto:electricboats@yahoogroups.com

Sent: Saturday, August 29, 2015 9:37 PM

To: electricboats@yahoogroups.com

Subject: [Electric Boats] lower unit noise - New type of motor

Mine was annoyingly noisy if the drive shaft pressed down on the
gears in the foot. With the motor coupling adjusted so it didn't, it
was quite quiet.
(Unit: 'Honda 75' 7.5HP)

=====

And while I'm writing, here's a potential new improvement for
outboard conversions...

Presently I'm prototyping a novel configuration of reluctance motor,
first model maybe 4500W. If it works well, the steel rotor with no
magnets or wires to break loose should be good for quite high RPM.s,
compensating for the gear reduction at the foot of most outboard
legs. I've prototyped the motor controller, which should be
inherently more reliable than typical BLDC controllers. (Little or no
chance of destructive shoot-through currents.) There'll be a few
photos of the build in monthly Turquoise Energy News #91 in a few
days.

As it is simple and has no supermagnets this motor should be
relatively cheap, and easy to assemble. (And I have created a second
somewhat similar design that looks probably even better! I conceived
them both this month. The first one is half built, so it gets
finished.)

Craig
http://www.TurquoiseEnergy.com/
Victoria BC