In a synchronous motor, the breakdown torque will be _________ to Applied voltage V

Question

Examoogle · Accepted Answer

Option A: proportional

Explanation & Concepts:
The correct answer is A (proportional). In a synchronous motor, the breakdown torque is directly proportional to the applied voltage (V). This means that as the voltage increases, the breakdown torque also increases.

Working Principle: This relationship occurs because the torque developed in a synchronous motor depends on the magnitude of the stator voltage, which influences the field strength. Higher applied voltage results in greater field excitation, leading to increased torque capabilities.

Key Formulas: $T_{breakdown} \propto V$ — Breakdown Torque proportional to Voltage

Key Points: The synchronous motor maintains synchronism with the rotating magnetic field.; The breakdown torque is essential for determining the stability of the motor under varying loads.

Advantages: High efficiency at synchronous speed.; Provides constant speed irrespective of load conditions.

Disadvantages: Requires starting means to bring it up to synchronous speed.; Performance affected by changes in load torque.

Applications: Used in applications requiring constant speed and high reliability.; Common in industrial drives, power generation, and synchronous condensers.

Additional Info: The breakdown torque is the maximum torque that a synchronous motor can develop without losing synchronism.. Option B is incorrect because the relationship is linear, not quadratic.

Answer: A is correct — Breakdown torque increases linearly with applied voltage.

Exam Tip: Understand the characteristics of synchronous motors well, as they are commonly tested in both electrical engineering and power systems sections.

Examoogle · Answer

Option B: square proportional

Examoogle · Answer

Option C: inversely proportional

Examoogle · Answer

Option D: inversely square proportional

Correct Answer

Discussion (0)

Correct Answer

Related Questions

Discussion (0)