[PSUBS-MAILIST] amp gauge

Sat Jun 18 20:12:31 EDT 2016

Alan,If I increase the voltage, I will increase the rpm that should in turn increase the load.No? Yes?Hank 

    On Saturday, June 18, 2016 5:53 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,the amps are proportional to the load. If the low amp draw iscorrect then a higher pitched or bigger prop would be the solution.Cliff has amp draw specs on the 101. If your motor is of a similarsize maybe you could aim at his amp draw rate! Alan

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Sunday, June 19, 2016 10:48 AM
 Subject: Re: [PSUBS-MAILIST] amp gauge

Alan,There is some mystery with the motors, we think they are 36v but the amp draw is to low.   I think I will bump it to 48 volts on my next dive.  They could use a bit more power i think. I tested them at 48v in the lake here at home and they seemed happy and very powerful to hold onto by hand.Hank 

    On Saturday, June 18, 2016 4:12 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,no the voltage won't matter. The meter reads the voltage drop across the shunt.So at 7 amps per motor that's 250W each. What is the motor rating in watts?Are they the original propellers? Am thinking that if that is the correct amp reading& the motors are rated a lot more than 250W, then you could go with a bigger orhigher pitched propeller to put a higher load on. Alan

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Sunday, June 19, 2016 9:36 AM
 Subject: Re: [PSUBS-MAILIST] amp gauge

Alan,The amp rating is 100a  I am drawing 14a with both motors running.  They are not gear head motors.  Does the voltage matter?  Hank 

    On Saturday, June 18, 2016 3:23 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,I have a couple of those external shunts & there is only a maximum amp rating printed on them.The voltage can vary depending on the state of charge anyway.What are you drawing at full power? Are the motors geared?Alan

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Sunday, June 19, 2016 2:15 AM
 Subject: [PSUBS-MAILIST] amp gauge

I am wondering if the amp gauge in Gamma is reading correctly.  Gamma was a 24v system and I have 36 v going through the amp bar and reading the amps from the original gauge.  Does the increased voltage impact the amp reading?Hank
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