induction machine

Three phase induction motor MCQ | Electrical Machine question and answers
Electrical Engineer
1) WHEN A THREE PH ASE INDUCTION MOTOR IS ROTATING AT STEADY STATE. THEN IF THE LOAD IS INCREASED THEN THE SLIP WILL…….. AND THE EFFICIENCY ...
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Electrical Machine MCQ | practical training (Machine and protection MCQ)
Electrical Engineer
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A460-V. 30-hp. 60-Hz. four-pole. Star-connected induction motor has two possible rotor designs. a single-cage rotor and a double-cage rotor. (The stator is identical for either rotor design.) The motor with the single-cage rotor may be modeled by the following impedances in ohms per phase referred to the stator circuit: R1= 0.641 Ω X1 = 0.750 Ω R2 = 0.3 Ω X2 = 0.5 Ω Xm= 26.3 Ω The motor with the double-cage rotor may be modeled as a tightly coupled. High resistance outer cage in parallel with a loosely coupled. Low resistance inner cage The stator and magnetization resistance and reactances will be identical with those in the single-cage design. The resistance and reactance of the rotor outer cage are: R2o, = 3.2 Ω X2o, = 0.5 Ω The resistance and reactance of the inner cage are R2i = 0.4 Ω X2i = 3.3 Ω Write a MATLAB script to calculate and plot the two torque-speed characteristics with the two rotor designs. How do they compare?
Electrical Engineer
 A460-V. 30-hp. 60-Hz. four-pole. Star-connected induction motor has two possible rotor designs. a single-cage rotor and a double-cage rotor...
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