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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?
What classification of A.C. motors is based on their design features?
What classification of A.C. motors is based on their design features?
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?
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?
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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?
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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)
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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.)
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Description
Test your knowledge on the classification of AC motors based on various principles such as operational, current type, speed, and structural features. This quiz will help reinforce your understanding of the different types of synchronous and asynchronous motors. Challenge yourself and see how much you know about AC motors!
