1
GATE EE 2023
Numerical
+2
-0
A three-phase synchronous motor with synchronous impedance of 0.1+j0.3 per unit per phase has a static stability limit of 2.5 per unit. The corresponding excitation voltage in per unit is _________ (Round off to 2 decimal places).
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2
GATE EE 2022
Numerical
+2
-0
A star-connected 3-phase, 400 V, 50 kVA, 50 Hz synchronous motor has a synchronous reactance of 1 ohm per phase with negligible armature resistance. The shaft load on the motor is 10 kW while the power factor is 0.8 leading. The loss in the motor is 2 kW. The magnitude of the per phase excitation emf of the motor, in volts, is ________. (round off to nearest integer).
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3
GATE EE 2017 Set 2
Numerical
+2
-0
Two generating units rated $$300$$ $$MW$$ and $$400$$ $$MW$$ have governor speed regulation of $$6\% $$ and $$4\% $$ respectively from no load to full load. Both the generating units are operating in parallel to share a load of $$600$$ $$MW.$$ Assuming free governor action, the load shared by the larger unit is _______ $$MW.$$
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4
GATE EE 2017 Set 2
Numerical
+2
-0
A $$25$$ $$kVA,$$ $$400$$ $$V,$$ $$\Delta $$ - connected, $$3$$-phase, cylindrical rotor synchronous generator requires a field current of $$5$$ $$A$$ to maintain the rated armature current under short-circuit condition. For the same field current, the open-circuit voltage is $$360$$ $$V.$$ Neglecting the armature resistance and magnetic saturation, its voltage regulation (in $$\% $$ with respect to terminal voltage), when the generator delivers the rated load at $$0.8$$ $$pf$$ leading, at rated terminal voltage is ____________.
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Questions Asked from Synchronous Machines (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE EE 2024 (2)
GATE EE 2023 (1)
GATE EE 2022 (1)
GATE EE 2017 Set 2 (3)
GATE EE 2017 Set 1 (1)
GATE EE 2016 Set 1 (1)
GATE EE 2015 Set 2 (1)
GATE EE 2014 Set 2 (3)
GATE EE 2014 Set 3 (1)
GATE EE 2014 Set 1 (1)
GATE EE 2011 (1)
GATE EE 2010 (2)
GATE EE 2009 (1)
GATE EE 2008 (2)
GATE EE 2007 (2)
GATE EE 2006 (3)
GATE EE 2005 (2)
GATE EE 2004 (6)
GATE EE 2003 (1)
GATE EE 2002 (1)
GATE EE 2001 (1)
GATE EE 2000 (1)
GATE EE 1999 (1)
GATE EE 1998 (1)
GATE EE 1997 (1)
GATE EE 1993 (3)
GATE EE Subjects
Electric Circuits
Electromagnetic Fields
Signals and Systems
Electrical Machines
Engineering Mathematics
General Aptitude
Power System Analysis
Electrical and Electronics Measurement
Analog Electronics
Control Systems
Power Electronics