What is the exam pattern and passing mark for GTU Electric Drives (3160919)?

The GTU theory examination carries 70 total marks with a duration of 2.5 Hours. Minimum passing criteria is 23 marks (33%). The paper consists of 5 main questions with official marking breakdown and internal choices.

Where can I download the official GTU 3160919 Summer 2026 question paper PDF?

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Gujarat Technological UniversitySummer 2026 examination

GTU 3160919 Electric Drives Summer 2026 Question Paper & PDF

B.E. · Electrical Engineering · Semester 6 · Subject code 3160919

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Total: 70 marks
To pass: 23 marks (33%)
Duration: 2.5 Hours 10:30 AM – 1:00 PM
Questions: 5 with internal choice

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10 of 25 questions on this paper were also asked in other years. Each is marked below with the years it appeared.See all 10 repeated 3160919 questions, most asked first

Q.1

14 Marks

(a)

3 marks

Define the shunt, series and separately excited DC motor with connection diagram.

(b)

4 marks

List the stator and rotor parameters of three phase induction motor and label them in approximate equivalent circuit diagram.

(c)

7 marks

Discuss the advantages and disadvantages of drive control over conventional motor control.

Q.2

14 Marks

(a)

3 marksAsked in 2 of 2 papers

Derive the equation of torque developed by separately excited dc motor.

Also asked in Summer 2025 Q1a

(b)

4 marksAsked in 2 of 2 papers

Analyze the effect of rotor resistance variation on speed torque curve of induction motor.

Also asked in Summer 2025 Q4a

(c)

7 marksAsked in 2 of 2 papers

Evaluate the torque speed curve of induction motor with diagram in context of applied voltage and applied frequency variation.

Also asked in Summer 2025 Q5b OR

(c)

7 marksAsked in 2 of 2 papers

Compare the constant torque and constant power region of DC motor operation on T- ω and P-ω characteristic plane.

Also asked in Summer 2025 Q5b

Q.3

14 Marks

(a)

3 marksAsked in 2 of 2 papers

State the functions of current controller in DC motor control.

Also asked in Summer 2025 Q3a

(b)

4 marks

Determine the dynamic behavior of the DC drive from the torque balance equation.

(c)

7 marksAsked in 2 of 2 papers

Analyze the slip power recovery system with diagram in context of efficiency improvement of three phase induction motor.

Also asked in Summer 2025 Q4b OR, Summer 2025 Q5c

(a)

3 marks

State the principle and applications of scalar control of induction motor.

(b)

4 marksAsked in 2 of 2 papers

Show that the SVPWM technique has 15% higher DC bus utilization than the SPWM technique.

Also asked in Summer 2025 Q5a

(c)

7 marks

Analyze how the rotor resistance influence the starting and running performance of wound rotor induction motor in context of starting torque and power factor.

Q.4

14 Marks

(a)

3 marks

Define CCM and DCM in context of DC-DC buck converter.

(b)

4 marksAsked in 2 of 2 papers

How to apply the TRC and CLC methods for output voltage control of chopper fed DC drive?

Also asked in Summer 2025 Q3c OR

(c)

7 marks

Explain the operation of class C chopper with circuit diagram and waveforms.

(a)

3 marks

State the voltage, current and power polarity in four quadrant chopper with quadrant diagram and application of each quadrant.

(b)

4 marks

Apply the cyclo-converter to half the speed of 50 Hz single phase induction motor drive.

(c)

7 marks

Explain the working of three phase VSI with circuit diagram and waveforms of line voltage and phase voltage.

Q.5

14 Marks

(a)

3 marks

Model the chopper as gain with switching delay and write it’s transfer function.

(b)

4 marksAsked in 2 of 2 papers

Analyze the specific torque-speed characteristics of centrifugal fan and pump.

Also asked in Summer 2025 Q2a

(c)

7 marksAsked in 2 of 2 papers

Explain with block diagram the inner current loop and outer speed loop applied to DC drive.

Also asked in Summer 2025 Q1c

(a)

3 marks

State the limitations of field weakening method applied to induction motor.

(b)

4 marks

Analyze the relationship between slip, back EMF, and motor torque during a load- induced speed drop.

(c)

7 marks

Explain with block diagram how the DC link inverter used for three phase Variable Voltage Variable Frequency control of induction motor.

More Electric Drives papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Summer 202570 marks · 5 questions

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About this paper

Official Gujarat Technological University (GTU) examination paper for Electric Drives (Summer 2026, B.E. · Electrical Engineering, Sem 6). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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