Apr 17th 2018, 10:25 AM
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Junior Member
Join Date: Apr 2018
Posts: 1
| Power of a rotor - derivation
I'm trying to understand the equation P = 2(pi)TN/60, where T=torque, N=rpm...
So far I understand:
E = F.d = F.(2.pi.r)*(no. of revolutions) = 2T.pi.n
And
P = E/t = 2T.pi.n/t - but n/t is revolutions per second, so:
P = 2T.pi.f f = rev/second
This is where I'm having trouble, because
1 rev/sec = 60 rpm, so I'd say:
P = 2T.pi.60.N
but in the textbook and online it says P = 2(pi)TN/60 so I'm not sure what's going on...
Anyone know what's going on?
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