Rockwell Automation SA500 Drive Configuration and Programming - Manual (Page 120)

F-2 SA500 Drive Configuration and Programming
F.2 Torque Gain
Where P_base = Rated Motor Power (W) (1HP = 746W)
W_base = Rated Full Load Speed (rpm)
Ifl = Rated Motor Current (rms)
Im = NL Stator Current (rms)
Nm = ft-lbs.
∗
1.35582
K_torq = (Nm/Amp)
The torque producing component of the full load current, Iq, in the above equation is:
F.3 Stator Inductance
Where X
1
= Stator Leakage Reactance (ohms)
X
2
= Rotor Leakage Reactance (ohms)
fo = Rated Motor Frequency (Hz)
2
∗ (W_base
∗
2
∗ π)
–
∗
2
Ifl
60
∗
P_Base
K _ torq =
2
Im ( )
2
∗
–
2
Ifl
2
Im ( )
Iq =
2
∗ π ∗
fo
X
1
+ X
2 L ' s
≈
∗
1000 [mH]