Electric Motor Drivers Question Question A star connected squirrel cage asynchronous motor with 460 Volt (between phases), 60 Hz, 3 poles, rated at 1180 rpm, Rs 1 085, Rr ' 0 07 , Xs 0 75 Xr 0 67 and Rc 0 have Xm 20 equivalent circuit parameters Motor Tload drives a crane with a constant character If controlling with V f technique if the frequency is set to 40 Hz What is the phase voltage to be applied Rated moment (for frequency 60) if the frequency is set to 40 Hz What is the phase voltage to be applied Rated moment (for frequency 60) Long enough after the 40 Hz frequency has begun to be applied What will the engine speed be in rpm Note 1 All losses not given can be neglected Note 2 It should be accepted that electrical dynamics develop much faster than mechanical dynamics

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Question: Electric Motor Drivers Question Question : A star-connected squirrel cage asynchronous motor with 460 Volt (between phases), 60 Hz, 3 poles, rated at 1180 rpm,

Electric Motor Drivers Question

Question: A star-connected squirrel cage asynchronous motor with 460 Volt (between phases), 60 Hz, 3 poles, rated at 1180 rpm, Rs = 1.085, Rr '= 0.07 , Xs = 0.75 . Xr = 0.67 and Rc = 0 have Xm = 20 equivalent circuit parameters. Motor Tload = drives a crane with a constant character. If controlling with V / f technique...

if the frequency is set to 40 Hz. What is the phase voltage to be applied?
Rated moment? (for frequency 60)
if the frequency is set to 40 Hz. What is the phase voltage to be applied?
Rated moment? (for frequency 60)
Long enough after the 40 Hz frequency has begun to be applied. What will the engine speed be in rpm.

Note.1: All losses not given can be neglected.

Note.2: It should be accepted that electrical dynamics develop much faster than mechanical dynamics.

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