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In a synchronous motor, The normal range of speed regulation is ___________.
5 to 10 % of No-load Speed
5 to 10 % of Full-load Speed
Zero %
Can't say anything without knowing the rotor type (salient pole or cylindrical rotor)
Zero %
The correct answer is C (Zero %). In synchronous motors, speed regulation is defined as the change in speed from no-load to full-load conditions. These motors maintain a constant speed regardless of load changes, resulting in zero percent speed regulation.
The correct answer is C (Zero %). In synchronous motors, speed regulation is defined as the change in speed from no-load to full-load conditions. These motors maintain a constant speed regardless of load changes, resulting in zero percent speed regulation.
Synchronous motors operate at a constant speed determined by the supply frequency and number of poles. The rotor in these motors is synchronized with the stator's magnetic field, thus providing a constant speed under varying load conditions.
Synchronous motors achieve zero speed regulation.
Speed remains constant irrespective of the load applied.
High efficiency under rated conditions.
Stable operation at synchronous speed.
Require a starting mechanism for operation.
Complex design compared to other motors.
Used in applications requiring precise speed control.
Commonly used in synchronous condensers and large industrial drives.
Standard value for speed regulation is often cited as zero percent for synchronous motors.
Option A and Option B refer to load conditions which do not apply to synchronous motors.
C is correct — Synchronous motors inherently have zero percent speed regulation.
Understanding different motor types and their speed characteristics is crucial for electrical engineering exams.