In a 3-phase synchronous motor, the magnitude of field flux in study state condition

Question

Examoogle · Accepted Answer

Option A: Remains constant at all loads

Explanation & Concepts:
In a 3-phase synchronous motor, the magnitude of field flux remains constant across varying load conditions. This is due to the nature of the synchronous operation, where the rotor and stator magnetic fields are synchronized.

Working Principle: The synchronous motor operates at a constant speed and maintains a constant magnetic field due to its excitation system. As the load changes, the rotor adjusts to maintain synchronous speed, and the field current remains unchanged, ensuring constant field flux.

Key Points: The rotor maintains synchronous speed regardless of load.; Field flux is determined by the excitation system, not by load variations.

Advantages: Constant speed operation under varying load conditions.; Higher efficiency compared to induction motors.

Disadvantages: Requires an external DC source for excitation.; More complex control systems compared to induction motors.

Applications: Used in applications requiring precise speed control.; Common in power generation and industrial drives.

Additional Info: Standard operational behavior of synchronous motors involves maintaining a constant field flux.. Wrong options explanation: Option B is incorrect as field flux does not vary with speed; it is constant when the motor is synchronized.

Answer: A is correct — The constant field flux is essential for the synchronous operation of the motor.

Exam Tip: Understanding the differences between synchronous and induction motors is crucial for exam preparation.

Examoogle · Answer

Option B: Varies with speed

Examoogle · Answer

Option C: Varies with load

Examoogle · Answer

Option D: Varies with power factor

Correct Answer

Discussion (0)

Correct Answer

Related Questions

Discussion (0)