The above circuit diagram is represents? 

This question was previously asked in
PGCIL NER DT (Electrical) 27 Feb 2022 Official Paper
View all PGCIL Diploma Trainee Papers >
  1. Three phase induction motor 
  2. Shunt DC motor  
  3. Synchronous motor 
  4. Three phase squirrel cage motor 

Answer (Detailed Solution Below)

Option 3 : Synchronous motor 
Free
CT 1: Classification I
10 Qs. 10 Marks 10 Mins

Detailed Solution

Download Solution PDF

The correct answer is option 3):(Synchronous motor )

Concept:

The Synchronous motor:

  • It is an AC motor in which at a steady state, the rotation of the shaft is synchronized with the frequency of supply current; the rotation period is exactly equal to an integral number of AC cycles.
  • The operation of a synchronous motor is due to the interaction of the magnetic fields of the stator and the rotor. Stator winding is provided with a 3-phase supply and rotor winding is provided with a DC supply.
  • It is called a synchronous motor because the rotor rotates at the same speed as that of the rotating magnetic field.
  • It is a constant-speed motor because even if there is an increase in load, the motor still runs at the same synchronous speed.
  • Synchronous motors are used where precise and constant speed is required such as ball mills, clocks, record players, etc.

Latest PGCIL Diploma Trainee Updates

Last updated on May 9, 2025

-> PGCIL Diploma Trainee result 2025 will be released in the third week of May. 

-> The PGCIL Diploma Trainee Answer key 2025 has been released on 12th April. Candidates can raise objection from 12 April to 14 April 2025.

-> The PGCIL DT Exam was conducted on 11 April 2025. 

-> Candidates had applied online from 21st October 2024 to 19th November 2024.

-> A total of 666 vacancies have been released.

-> Candidates between 18 -27 years of age, with a diploma in the concerned stream are eligible.

-> Attempt PGCIL Diploma Trainee Previous Year Papers for good preparation.

More Alternator and Synchronous Motors Questions

Hot Links: teen patti game paisa wala teen patti real cash apk teen patti master golden india teen patti master gold apk teen patti joy mod apk