Quote:
|
Originally Posted by glassdoctor
Serum, I probably missed your post.. I skipped a few posts on the first page, sorry. I'm sure you tried to make the same point as me.
We are having some difficulty making it clear to sleebus and maybe some others....
Please guys, don't get this confused with changing motors, and/gearing with a change in voltage. That's a different subject.
Try again:
A motor DOES draw more amps with higher voltage, under the same load.
Sleebus, let's use that motor in the picture you talk about as an example. It doesn't have a built-in current limiter that forces the motor to only draw the rated 1hp, or 746 watts. That is only a rating on what the motor can do within spec, without self-destructing or stalling, etc. Each motor has a limit to what it can do, for both short cycles and continuous duty.
If that motor produces 1 hp at 110V, then it would indeed produce more power at higher voltage. But at some point it will burn up, literally. That is why we have different motors that are designed to run at higher voltage. They are a different wind, and draw less amps and turn a lower rpm per volt. So when this "high volt" motor is run at the higher voltage, it can produce the same hp at half the amps. It's a DIFFERENT motor.
I wish you were right sleebus, because we could have our cake and eat it too. :004:
|
Well, I have been doing some testing lately. I do not have a watt meter but I can tell you this.
5S 3200mAh Lipo with 24/51 gearing = 14min runtime
6S 3200mAh Lipo with 24/51 gearing = 16min runtime
Just for a comparison:
6S 3200mAh Lipo with 20/51 gearing = 17+min runtime
These test cases are reproducable and, call me crazy but, they seem to indicate that a lower current is achieved at higher voltage with the SAME gear ratio.
Now, before you call me crazy, understand that I realize every motor has its limits but if you run the motor within its efficiency range, it seems the higher the voltage, the better. My motor is rated for 6S and it seems that 6S is the most efficient as well.