GATE Electrical Machines: Three-phase induction machines: principle of operation, types, performance, torque-speed characteristics, no-load and blocked-rotor tests, equivalent circuit, starting and speed control – Previous Year Questions
18 GATE previous year questions on Three-phase induction machines: principle of operation, types, performance, torque-speed characteristics, no-load and blocked-rotor tests, equivalent circuit, starting and speed control (Electrical Machines, Electrical Engineering) with answers and explanations, from every paper.
- GATE 2017 EE Q18 – A 4 pole induction machine is working as an induction generator. The generator supply frequency is 60 Hz. The rotor current frequency is 5 Hz. The…
- GATE 2015 EE Q44 – A 3-phase 50 Hz square wave (6-step) VSI feeds a 3-phase, 4 pole induction motor. The VSI line voltage has a dominant 5th harmonic component. If the…
- GATE 2016 EE Q26 – In a constant V/f induction motor drive, the slip at the maximum torque
- GATE 2019 EE Q20 – The parameter of an equivalent circuit of a three-phase induction motor affected by reducing the rms value of the supply voltage at the rated…
- GATE 2019 EE Q57 – A delta-connected, 3.7 kW, 400 V(line), three-phase, 4-pole, 50-Hz squirrel-cage induction motor has the following equivalent circuit parameters per…
- GATE 2020 EE Q27 – A three-phase, 50 Hz, 4-pole induction motor runs at no-load with a slip of 1 %. With full load, the slip increases to 5 %. The % speed regulation of…
- GATE 2021 EE Q28 – The power input to a 500 V, 50 Hz, 6-pole, 3-phase induction motor running at 975 RPM is 40 kW. The total stator losses are 1 kW. If the total…
- GATE 2021 EE Q55 – An 8-pole, 50 Hz, three-phase, slip-ring induction motor has an effective rotor resistance of 0.08\ per phase. Its speed at maximum torque is 650 RPM.…
- GATE 2022 EE Q35 – The frequencies of the stator and rotor currents flowing in a three-phase 8-pole induction motor are 40 Hz and 1 Hz, respectively. The motor speed, in…
- GATE 2022 EE Q63 – A 4-pole induction motor with inertia of 0.1 kg-m2 drives a constant load torque of 2 Nm. The speed of the motor is increased linearly from 1000 rpm…
- GATE 2022 EE Q65 – A 3-phase, 415 V, 4-pole, 50 Hz induction motor draws 5 times the rated current at rated voltage at starting. It is required to bring down the…
- GATE 2023 EE Q15 – The following columns present various modes of induction machine operation and the ranges of slip A: Mode of operation B: Range of slip a. Running in…
- GATE 2023 EE Q48 – A three phase 415 V, 50 Hz, 6-pole, 960 RPM, 4 HP squirrel cage induction motor drives a constant torque load at rated speed operating from rated…
- GATE 2024 EE Q17 – A three phase, 50 Hz, 6 pole induction motor runs at 960 rpm. The stator copper loss, core loss, and the rotational loss of the motor can be…
- GATE 2024 EE Q54 – A 3-phase star connected slip ring induction motor has the following parameters referred to the stator: R s=3\ ,\ X s=2\ ,\ X r'=2\ ,\ R r'=2.5\ The…
- GATE 2025 EE Q45 – A 3-phase, 400 V, 4 pole, 50 Hz star connected induction motor has the following parameters referred to the stator: R r'=1\ , X s=X r'=2\ Stator…
- GATE 2026 EE Q21 – Which one of the following options is correct regarding the typical double-squirrel-cage structure used in induction motors?
- GATE 2026 EE Q59 – A balanced three-phase supply is given to a 30 kW, 4-pole, 400 V, 50 Hz, wound rotor induction motor with Y-connected stator and rotor windings. The…