Podcast
Questions and Answers
Which type of A.C. motor operates with a fixed rotational speed under normal conditions?
Which type of A.C. motor operates with a fixed rotational speed under normal conditions?
- Commutator motor
- Synchronous motor (correct)
- Induction motor
- Repulsion motor
What classification of A.C. motors is based on their design features?
What classification of A.C. motors is based on their design features?
- Variable speed
- Squirrel cage
- Single phase
- Enclosed (correct)
Which category of asynchronous motors is primarily characterized by the use of external resistance?
Which category of asynchronous motors is primarily characterized by the use of external resistance?
- Squirrel cage induction motor
- Repulsion-start induction motor
- Slip-ring induction motor (correct)
- Shunt commutator motor
Which type of A.C. motor is suitable for applications requiring adjustable speed?
Which type of A.C. motor is suitable for applications requiring adjustable speed?
In the classification based on current type, which option represents a motor that operates with three-phase current?
In the classification based on current type, which option represents a motor that operates with three-phase current?
Flashcards
Synchronous Motor
Synchronous Motor
Motors whose speed is directly proportional to the frequency of the supply voltage and the number of poles.
Induction Motor
Induction Motor
Motors with a rotating magnetic field that induces a current in the rotor, causing it to rotate.
Asynchronous Motor
Asynchronous Motor
Motors whose speed is not directly proportional to the supply frequency, but depends on the load.
Single-Phase AC Motor
Single-Phase AC Motor
Signup and view all the flashcards
Three-Phase AC Motor
Three-Phase AC Motor
Signup and view all the flashcards
Study Notes
AC Motor Classification
-
Classified by operational principle:
- Synchronous motors (plain and super types)
- Asynchronous motors:
- Induction motors (squirrel cage, single/double; slip-ring, external resistance)
- Commutator motors (series, single-phase universal; compensated, conductively/inductively; shunt, simple compensated; repulsion, straight compensated; repulsion-start induction; repulsion induction)
-
Classified by current type:
- Single-phase
- Three-phase
-
Classified by speed:
- Constant speed
- Variable speed
- Adjustable speed
-
Classified by structural features:
- Open
- Enclosed
- Semi-enclosed
- Ventilated
- Pipe-ventilated
- Rivetted frame/eye (etc.)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
