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Slip of three-phase induction motor in per unit is defined by
S = NтВЫ - N
S=тАЛNтИТтАЛNNтВЫтАЛ\тВЬ100тАЛ
S=тАЛNтИТтАЛNNтВЫтАЛ
N = NтВЫ┬а(1-S)
S=тАЛNтИТтАЛNNтВЫтАЛ
The slip of a three-phase induction motor in per unit is defined by the formula S=NsтАЛNsтАЛтИТNтАЛ, where NsтАЛ is the synchronous speed and N is the rotor speed. It indicates the difference between the synchronous and actual rotor speeds, expressed as a fraction of synchronous speed.
The slip of a three-phase induction motor in per unit is defined by the formula S=NsтАЛNsтАЛтИТNтАЛ, where NsтАЛ is the synchronous speed and N is the rotor speed. It indicates the difference between the synchronous and actual rotor speeds, expressed as a fraction of synchronous speed.
S=NsтАЛNsтАЛтИТNтАЛ тАФ defines slip in per unit
The slip occurs because the rotor must lag behind the rotating magnetic field generated by the stator. When the rotor speed is less than the synchronous speed, a relative motion is created, which induces current in the rotor conductors, resulting in torque production for motion.
Slip is a crucial parameter for induction motor performance.
It increases with an increase in load.
Allows for torque generation by inducing currents.
Helps in controlling the speed of the motor.
Higher slip increases losses and reduces efficiency.
Too much slip can lead to overheating.
Used in industrial drive systems.
Commonly applied in fans, pumps, and compressors.
Standard slip values for normal operation usually range from 2% to 6%.
Option A is incorrect as it does not provide a ratio; Option B uses a percentage but is incorrectly formatted; Option D presents a relation but does not define slip.
C is correct тАФ the per unit slip is defined in the context of the synchronous and rotor speeds.
Remember that in synchronous machines, slip is an important concept that differentiates their operation from asynchronous machines. Understanding both will enhance your grasp of electric machinery.