8 Terms
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Motors
Industry: Electrical equipment
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Motors
slip
Electrical equipment; Motors
The difference in speed between the rotating field of an induction motor and the actual rotor speed. Slip is usually expressed as a percentage of the synchronous speed.
speed no load (SNL)
Electrical equipment; Motors
Actual motor speed in rpm with no external load and specified terminal voltage.
speed load
Electrical equipment; Motors
The actual motor speed in RPM with a specified external load and specified terminal voltage and frequency.
speed regulation constant (Rm)
Electrical equipment; Motors
The slope of the speed-torque curve in rpm/oz.in. or rpm/Nm. Rm = R/KeKt.
stall current (Is)
Electrical equipment; Motors
This is the current at stall (locked rotor) with rated voltage applied. Is = Volts/Rt.
stall torque (Ts)
Electrical equipment; Motors
This is the actual torque at the output shaft under stall (locked rotor) conditions. Ts = (KtIs)-Tf.
starting current (Ias)
Electrical equipment; Motors
The minimum current necessary to overcome static friction torque and start motor rotation.
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