Tuesday, March 21, 2017

Re: [Electric Boats] Re: running a 45lb min kota from a 48 Volt battery bank.

 

Great

I will try this.

I guess I should test for max current with the motor in a bucket of water for some resistance.

I also have a 3.0 Farad capacitor module used for a car amp.
Maybe this would help to make the 12v output more stable at 12V.

The reason I want to go this way, is that I have a 48 Volt battery module that was removed from a Chevy Volt.
I am not comfortable with modifying it to 12V.

Thanks for everyones help.
--------------------------------------------
On Fri, 3/17/17, king_of_neworleans <no_reply@yahoogroups.com> wrote:

Subject: [Electric Boats] Re: running a 45lb min kota from a 48 Volt battery bank.
To: electricboats@yahoogroups.com
Received: Friday, March 17, 2017, 8:09 PM


 









Run your 12v motor from a 12v battery. Measure
battery current at full power setting. Multiply the current
in amps times the voltage to get power in watts.

Now feed a PWM controller with
a 48v battery with an ammeter in that circuit. (You may need
to install a shunt.) Run the PWM controller output to the
trolling motor, with the motor speed control set at full
power and the PWM power setting at zero. Take the power in
watts from the previous experiment and divide by 48 to get
max allowable battery current. Now you know how high you can
adjust the PWM output setting, by watching the ammeter.
Never set the power level high enough to exceed the
calculated max battery current on the ammeter. Good to
go.









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