wow thats big power....what are you pushing with that? the size and pitch of prop/transmission/rpm have to be right to keep from over-heating on long runs. throw in a temp gauge or a small fan blowing on the armature/brushes area
Bill Hopen - www.billhopen.com
Hopen Studio Inc - 227 Main St., Sutton WV 26601
304 -765-5611 billhopen@yahoo.com
Hopen Studio Inc - 227 Main St., Sutton WV 26601
304 -765-5611 billhopen@yahoo.com
From: "Mark F mark.internet@yahoo.ca [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Wednesday, February 3, 2016 10:16 PM
Subject: Re: [Electric Boats] Re: using a 36 Volt dc motor from a 48 volt pack
I have a 48 Volt battery module from a chevy volt, I plan on charging it with some solar panels.
I have a 36 Volt Golf cart motor(1960's vintage) attached to a chrysler 75 Hp outboard motor leg.
I am considering an altrax sepex controller.
My motor is a 36 volt DC sepex motor.
Like you say worst case I fry the motor.
--------------------------------------------
On Wed, 2/3/16, king_of_neworleans <no_reply@yahoogroups.com> wrote:
Subject: [Electric Boats] Re: using a 36 Volt dc motor from a 48 volt pack
To: electricboats@yahoogroups.com
Received: Wednesday, February 3, 2016, 5:28 PM
Sure. Overvolting most DC motors by a modest
amount usually won't cause a catastrophic failure,
though it might reduce lifespan of the motor through
degradation of the coil insulation. Not covered, is
overvolting, by warranty. You should have a temp sensor
installed and an overtemp shutdown system. I know my cheapie
Kelly controller shuts down at a certain temp if I enable it
and connect a thermistor, which I haven't by the way but
should. If the motor is not exceeding max operating temp you
are good to go. Just in case, you might want to have a spare
motor. No biggie because usually the motor is the cheapest
component. My controller cost twice what my motor cost. My
battery bank cost almost 3x what my motor cost. Even my
reduction gear cost more than my motor. So, I have two of
them. Three, actually, since I bought a 12kw motor to play
around with. My regular motor is 5kw. Anyway, as long as you
take proper precautions I don't see a problem. And with
a spare motor you are set for any uh-oh moments.
BTW, this opinion is
guaranteed to be worth a minimum of what you paid for it.
IOW, YMMV. But FWIW, I will be doing exactly the same thing
with my trolling motor powered pirogue, running off a
Chinese 48v PWM controller and 48v lithium e-bike battery.
The trolling motor is 12v, actually. I don't think it
will be a problem. If it is, I burn up a $130 trolling motor
and have to paddle back to the boat. Obviously I will not be
running it at full available power from the controller, but
it should work okay.
Is
your motor brushed, or brushless?
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I have a 36 Volt Golf cart motor(1960's vintage) attached to a chrysler 75 Hp outboard motor leg.
I am considering an altrax sepex controller.
My motor is a 36 volt DC sepex motor.
Like you say worst case I fry the motor.
--------------------------------------------
On Wed, 2/3/16, king_of_neworleans <no_reply@yahoogroups.com> wrote:
Subject: [Electric Boats] Re: using a 36 Volt dc motor from a 48 volt pack
To: electricboats@yahoogroups.com
Received: Wednesday, February 3, 2016, 5:28 PM
Sure. Overvolting most DC motors by a modest
amount usually won't cause a catastrophic failure,
though it might reduce lifespan of the motor through
degradation of the coil insulation. Not covered, is
overvolting, by warranty. You should have a temp sensor
installed and an overtemp shutdown system. I know my cheapie
Kelly controller shuts down at a certain temp if I enable it
and connect a thermistor, which I haven't by the way but
should. If the motor is not exceeding max operating temp you
are good to go. Just in case, you might want to have a spare
motor. No biggie because usually the motor is the cheapest
component. My controller cost twice what my motor cost. My
battery bank cost almost 3x what my motor cost. Even my
reduction gear cost more than my motor. So, I have two of
them. Three, actually, since I bought a 12kw motor to play
around with. My regular motor is 5kw. Anyway, as long as you
take proper precautions I don't see a problem. And with
a spare motor you are set for any uh-oh moments.
BTW, this opinion is
guaranteed to be worth a minimum of what you paid for it.
IOW, YMMV. But FWIW, I will be doing exactly the same thing
with my trolling motor powered pirogue, running off a
Chinese 48v PWM controller and 48v lithium e-bike battery.
The trolling motor is 12v, actually. I don't think it
will be a problem. If it is, I burn up a $130 trolling motor
and have to paddle back to the boat. Obviously I will not be
running it at full available power from the controller, but
it should work okay.
Is
your motor brushed, or brushless?
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