Re: [PSUBS-MAILIST] Interesting item on eBay web siteitem#275822570: X-9 "Y...

[Subscuba@aol.com]

Hello Pat,

I believe it is a 70AT/H Model. It's rated at 25.6 volts with a draw of 45 
amperes or 1152 watts. I run it from 36 volts through a motor controller I 
designed. I limited the motor current at 56 amperes to prevent stator 
demagnetization while taking some risk of overheating. Battery current with 
the motor running at 45 amperes and 24 volts is about 32 amperes. Since 1 
horsepower is equal to 745.7 watts, I draw from the controller 1.544857181 
horsepower. Due to motor losses, shaft horsepower is about 1.2005674532 HP, 
approximately. (Sometimes this site likes to nitpick) Have fun.

The motor controller is single ended not a H or full bridge as I suspect Minn 
Kota has and thus my design may be more efficient.

QUESTION: Can you tell me the voltage and current ratings of the "Monster"?  
Do you have to limit initial current surge to prevent stator demagnetization? 
I assume the motor is effectively shunt wound with a permanent magnet stator. 
I presently have three 12 volt batteries and can drive a 36 volt motor but I 
doubt if the speed increase would be worth the decreased battery run time. 
Still it would be interesting.

Ken Martindale

PS Don't forget I have a wet sub.