Join 60,000+ competitive exam aspirants
or with email
Your Cart
Subtotal₹0
Total₹0
Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
Join 60,000+ competitive exam aspirants
In a synchronous motor, “hunting” does not depend upon which of the following parameter variation.
Supply Frequency
Load fluctuation
Supply voltage
Winding friction
Winding friction
The correct answer is D (Winding friction) because hunting in synchronous motors primarily arises from variations in conditions like supply frequency, load fluctuations, and supply voltage. Winding friction does not significantly influence hunting as it relates more to system dynamics rather than electrical parameters.
The correct answer is D (Winding friction) because hunting in synchronous motors primarily arises from variations in conditions like supply frequency, load fluctuations, and supply voltage. Winding friction does not significantly influence hunting as it relates more to system dynamics rather than electrical parameters.
Hunting in synchronous motors is a phenomenon where the rotor does not maintain a constant synchronous speed but oscillates at a speed that is slightly above or below synchronous speed due to disturbances. This behavior results from changes in supply frequency, load variations, and supply voltage, affecting the motor's torque balance and its synchronism with the rotating magnetic field.
Hunting is caused by imbalances in torque due to external factors.
Winding friction is a mechanical factor and does not affect electrical synchronization.
Maintains speed under variable load conditions.
Improves power factor in some applications.
Prone to oscillations under varying loads.
Requires good control systems to mitigate hunting.
Used in synchronous generators for electricity generation.
Employed in large industrial drives requiring constant speed.
Hunting can cause excessive vibration and noise if not controlled.
Option A, B, and C are incorrect because they are directly related to the electrical characteristics that cause hunting.
D is correct — Winding friction does not influence the synchronous motor's tendency to hunt, which is primarily governed by electrical conditions.
Understand the impact of load and supply variations on machine performance to excel in related questions.