Electrical Machines
Induction Machines
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Synchronous Machines
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1
GATE EE 2014 Set 2
MCQ (Single Correct Answer)
+1
-0.3
In a constant V/f control of induction motor, the ratio V/f is maintained constant from 0 to base frequency, where V is the voltage applied to the motor at fundamental frequency f. Which of the following statements relating to low frequency operation of the motor is TRUE?
A
At low frequency, the stator flux increases from its rated value.
B
At low frequency, the stator flux decreases from its rated value.
C
At low frequency, the motor saturates.
D
At low frequency, the stator flux remains unchanged at its rated value.
2
GATE EE 2014 Set 3
MCQ (Single Correct Answer)
+1
-0.3
The torque-speed characteristics of motor ($$T_M$$) and load ($$T_L$$) for two cases are shown in the figures (a) and (b). The load torque is equal to motor torque at points P, Q, R and S GATE EE 2014 Set 3 Electrical Machines - Induction Machines Question 60 EnglishThe stable operating points are
A
P and R
B
P and S
C
Q and R
D
Q and S
3
GATE EE 2014 Set 3
MCQ (Single Correct Answer)
+1
-0.3
A single phase induction motor is provided with capacitor and centrifugal switch in series with auxiliary winding. The switch is expected to operate at a speed of 0.7 Ns, but due to malfunctioning the switch fails to operate. The torque-speed characteristic of the motor is represented by
A
GATE EE 2014 Set 3 Electrical Machines - Induction Machines Question 61 English Option 1
B
GATE EE 2014 Set 3 Electrical Machines - Induction Machines Question 61 English Option 2
C
GATE EE 2014 Set 3 Electrical Machines - Induction Machines Question 61 English Option 3
D
GATE EE 2014 Set 3 Electrical Machines - Induction Machines Question 61 English Option 4
4
GATE EE 2014 Set 1
Numerical
+1
-0
An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 700 rpm. The frequency of the rotor current of the motor in Hz is ________.
Your input ____
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement