I am working on an electric longboard, retaining the original battery pack and brushless hub motors. I want to be able to control this with an Arduino. I want to know what size ESC I will need. The battery pack is 30V and the hub motors have a 1200W rating each. Will a 50Amp ESC be sufficient for each motor?
\$\begingroup\$
\$\endgroup\$
1
-
1\$\begingroup\$ That depends a lot on the conditions and qualifcations of usage and the ratings you give - a big problem is that those are marketing driven hobby product ratings, not engineering ratings, so unless you can find an actual data sheet (and be confident a given example will meet it) it is hard to give an engineering answer, vs. simply looking at what worked for other people. \$\endgroup\$ – Chris Stratton Dec 5 '16 at 5:10
Add a comment
|
\$\begingroup\$
\$\endgroup\$
1
This is why we have Ohm's Law: I = P/E
- P = Power (Watts)
- E = Electromotive Force (Volts)
- I = Current (Amps)
You can calculate any of the factors given two factors:
I made an Ohm's Law calculator online here: http://www.rcrowley.com/eirp.htm
If you plug in 30V and 1200W, it shows that the current is 40A. So your 50A ESC should be adequate.
answered Dec 5 '16 at 5:10
-
\$\begingroup\$ Feel free to reveal why you voted this down???? \$\endgroup\$ – Richard Crowley Dec 5 '16 at 5:50
