a 4-pole, 415V/60Hz three-phase squirrel-cage induction motor is Y-connected and has a rated speed of 1470rpm and R2=0.28N R°2= 0.210, X;=X'2= 0.422 Xm= 552. 1. If the motor is operated at speed of 2058rpm and Volt-per-Hertz control is used: 1. What would be the voltage? 2. What would be the frequency of the supply? (in Hz) 3. In this case, the motor is operating in what region? Oa. Constant speed Ob. Constant Power Oc. Constant power and torque Od. Constant Torque Oe. Cannot be specified. More information is needed

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a 4-pole, 415V/60Hz three-phase squirrel-cage induction motor is Y-connected and has a rated speed of 1470rpm and R =0.282,
R'2= 0.210, X1=X'2= 0.420, Xm= 55N.
1. If the motor is operated at speed of 2058rpm and Volt-per-Hertz control is used:
1. What would be the voltage?
2. What would be the frequency of the supply? (in Hz)
3. In this case, the motor is operating in what region?
a. Constant speed
b. Constant Power
Oc. Constant power and torque
d. Constant Torque
Oe. Cannot be specified. More information is needed
2. If Volt-per-Hertz control is used and the voltage is 375, find:
1. what should be the frequency? (in Hz)
2. What is the maximum torque in this case?
Transcribed Image Text:a 4-pole, 415V/60Hz three-phase squirrel-cage induction motor is Y-connected and has a rated speed of 1470rpm and R =0.282, R'2= 0.210, X1=X'2= 0.420, Xm= 55N. 1. If the motor is operated at speed of 2058rpm and Volt-per-Hertz control is used: 1. What would be the voltage? 2. What would be the frequency of the supply? (in Hz) 3. In this case, the motor is operating in what region? a. Constant speed b. Constant Power Oc. Constant power and torque d. Constant Torque Oe. Cannot be specified. More information is needed 2. If Volt-per-Hertz control is used and the voltage is 375, find: 1. what should be the frequency? (in Hz) 2. What is the maximum torque in this case?
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