Cicatrix Build Diary

**PJ-27** · 15th May 2011, 22:15

Wouldn't increasing the voltage reduce the current? Amps = Watts / Volts

Although all my school taught knowledge is gradually being dispelled!

**Anttazz** · 15th May 2011, 22:27

I did think about that, but then I thought that the power output of the motor would just decrease as the voltage decreased?

**Laser** · 16th May 2011, 16:13

watts = amps/volts(i think)

**typhoon_driver** · 16th May 2011, 16:58

power = current x voltage

Double the voltage to a motor, it will try and draw twice as much current so you get a 4 fold increase in power (in a perfect world) but things can get very hot very quickly. I also wouldn't recommend bouncing off a current limiter all the time.

**PJ-27** · 16th May 2011, 17:06

Is that what I said? Equation conversions are beyond at the moment (long day)......

**Anttazz** · 16th May 2011, 22:28

So if the motor is rated at 150W at 24V then thats 12.4A (I think) and if i'm running it at 19.2 then I probably wont be overdoing it with the XL ESC. Does that sound right?

**widow_twanky** · 16th May 2011, 22:43

Originally Posted by Anttazz

So if the motor is rated at 150W at 24V then thats 12.4A (I think) and if i'm running it at 19.2 then I probably wont be overdoing it with the XL ESC. Does that sound right?

When we used them in Cylon they were running at 24v on a scorpion XL. That said, the batteries weren't capable of delivering too much more than the 12.5A anyway so may have been limited by that.

Personally I reckon if you run these on at least a 30A speedo then you'll get the most out of them.

Andy

**Anttazz** · 16th May 2011, 23:05

The XL is the only thing I have spare at the moment, just because it came out of Cicatrix when I put the XXL in. As long as I don't break it I will be happy, will be good to get a wee test at Edinburgh and will see how it performs. Could even give it a test with the XXL afterwards just to see if there is any change.