- A 3-phase, A connected, 400 V, 6 pole, 50 Hz, induction motor has the following equivalent circuit constant in ohm per phase referred to the stator: R₁=0.68, X₁= 2.78, R 2-0.564, X 2=4.82, Xm=25 and Rc = 220 Calculate: (a) The slip at maximum torque. (b) The value of additional rotor resistance to obtain maximum torque at starting.

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7- A 3-phase, A connected, 400 V, 6 pole, 50 Hz, induction motor has the following
equivalent circuit constant in ohm per phase referred to the stator:
R₁=0.68, X₁= 2.78, R'2=0.564, X 2=4.82, Xm = 25 and Rc = 220
Calculate:
(a) The slip at maximum torque.
(b) The value of additional rotor resistance to obtain maximum torque at starting.
Transcribed Image Text:7- A 3-phase, A connected, 400 V, 6 pole, 50 Hz, induction motor has the following equivalent circuit constant in ohm per phase referred to the stator: R₁=0.68, X₁= 2.78, R'2=0.564, X 2=4.82, Xm = 25 and Rc = 220 Calculate: (a) The slip at maximum torque. (b) The value of additional rotor resistance to obtain maximum torque at starting.
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