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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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𝑷𝑨𝑮: 𝑷𝒄𝒖𝒓 (Airgap power: Rotor copper loss) is given by
s
(1-s)
s:(1-s)
(1-s)
s
The relationship between airgap power (P_{AG}) and rotor copper loss (P_{cur}) in an induction motor can be expressed as P_{AG}: P_{cur} = s, where s is the slip. This indicates that the ratio of the airgap power to rotor copper loss is equivalent to the slip of the motor.
The relationship between airgap power (P_{AG}) and rotor copper loss (P_{cur}) in an induction motor can be expressed as P_{AG}: P_{cur} = s, where s is the slip. This indicates that the ratio of the airgap power to rotor copper loss is equivalent to the slip of the motor.
s=NsNs−Nr — definition of slip
PAG:Pcur=s — relationship in induction motors
The slip (s) is defined as s=NsNs−Nr, where Ns is the synchronous speed and Nr is the rotor speed. This means that the greater the slip, the larger the proportion of airgap power lost as rotor copper loss, illustrating how rotor losses are connected to the slip of the motor.
Slip represents the difference between synchronous and rotor speeds.
An increase in slip results in higher rotor copper losses.
Understanding of machine efficiency
Insight into performance optimization
Increased losses at high slip
Potential overheating of rotor
Induction motors in industrial drives
Automation systems
Standard value or specification could involve typical slip values for various motor designs.
Option B is incorrect as it does not reflect the correct relationship involving slip.
A is correct — The ratio of airgap power to rotor copper loss is directly proportional to the slip in induction motors.
For competitive exams, remember that understanding the underlying principles of machine operation can help tackle related numerical problems efficiently.