Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following losses is not dissipated by the stator core surface in a synchronous motor?
Windage losses
Iron losses
Copper losses
Eddy current losses
Windage losses
Windage losses are not dissipated by the stator core surface in a synchronous motor, as they primarily arise due to air resistance when the rotor spins ┬╖ Unlike iron, copper, and eddy current losses, which occur due to magnetic fields and electrical resistance, windage losses are connected to mechanical motion and fluid dynamics.
Windage losses are not dissipated by the stator core surface in a synchronous motor, as they primarily arise due to air resistance when the rotor spins ┬╖ Unlike iron, copper, and eddy current losses, which occur due to magnetic fields and electrical resistance, windage losses are connected to mechanical motion and fluid dynamics.
PironтАЛ=I2R тАФ represents copper losses due to resistance in the windings
PeddyтАЛ=6╧БB2f2d2тАЛL тАФ represents eddy current losses in the core
Windage losses occur because of the friction and drag caused by the rotation of the rotor moving through the air ┬╖ In contrast, iron losses arise from the alternating magnetic fields in the stator core and copper losses are related to the electrical resistance in the windings, whereas eddy current losses are induced currents that flow within the core material due to changing magnetic fields.
Windage losses are unique as they involve mechanical drag with air and do not relate to electrical losses.
Iron losses (hysteresis and eddy current losses) are inherent in the magnetic operation of the motor.
Understanding these losses helps to optimize motor design and efficiency.
Reduces operational costs by minimizing energy losses.
Windage losses can become significant at higher speeds, requiring design considerations.
Ignoring them can lead to underestimating the actual operational losses.
Used in industries requiring high-speed synchronous motors.
Relevant in applications where efficiency is critical for performance.
Typically, windage losses can be significant in large synchronous motors with high-speed operations.
Option B (Iron losses) are associated primarily with magnetic fields and not with rotational movement; Option C (Copper losses) pertain to resistive heating in the windings; Option D (Eddy current losses) are caused by induced currents in the core material.
A is correct тАФ Windage losses are purely mechanical and do not dissipate through the stator core surface.
Focus on differentiating mechanical losses from electrical losses in machines, as this is a common exam topic.