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WorksheetsSynchronous Machine
Total questions: 11
Worksheet time: 3mins
What are the main components for constructing any Synchronous Machine (SM)?
armature, rotor
armature, stator
stator, rotor
In Induction Machines, the synchronous speed is
equal to the motor speed
smaller than the rotor speed
greater than rotor speed
greater than motor speed
In SMs, the synchronous speed is
greater than rotor speed
smaller than rotor speed
equal to the motor speed
In any SM's equivalent circuit, the Xs stands for ...
(a)
For any synchronous alternator, the excitation voltage is equal to Ef= Vt ..... j Ia Xs
plus
minus
For any synchronous motor, the excitation voltage is equal to Ef= Vt ..... j Ia Xs
plus
minus
The power angle is the angle between ...
the induced voltage and the terminal voltage
the armature current and the terminal voltage
the armature current and the induced voltage
While the power factor is cosine the angle between ...
the induced voltage and the terminal voltage
the armature current and the terminal voltage
the armature current and the induced voltage
There exist (a) losses at any SM
For a 3-phase star/Y connection SM, the armature current is calculated as the rated power divided by ...
the terminal voltage multiplied by square root 3
the terminal voltage divided by square root 3
the terminal voltage
For a 3-phase delta connection SM, the armature current is calculated as the rated power divided by ...
the terminal voltage multiplied by square root 3
the terminal voltage divided by square root 3
the terminal voltage
