RE: [PSUBS-MAILIST] 12 or 24v ?

Hi James,

As they say – “voltage is your friend”. Always bump it up if you can. Try running the minn kotas with a PWM speed control that’s being fed 36V.

Install an amp gauge on the leads going to each thruster. Then, under load, increase speed until you reach the maximum amount of amps that the motors are rated for. This will be the top speed. As long as the amp rating is not exceeded the motors will run fine. This not only makes the whole system more efficient, but gives you more rpm on the minn kotas without burning them up. This works especially well with brush motors that are oil filled.

Upper limit on DC systems in subs from a safety standpoint is about 50 V.

Greg

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of James Frankland
Sent: Wednesday, June 13, 2012 9:21 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] 12 or 24v ?

Hi All,

Does anyone have any thoughts on this?

My motors are 24V minn kotas. Do you think i should pass 12v through the pods and link them up 24v inside? Or link them up 24v inside and bring that through?

12v seems easier and i can run 12v things inside, but less efficient and might produce more heat on the penetrators.

24v more efficient and easier on the penetrator but i'll need a transformer inside to run 12v equipment.

Ive no idea what the penetrators run at.

Any thoughts?

Many thanks

James