Induction motors unit iii
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This document provides information about a subject code and unit taught by two lecturers, Mrs. A. Sangari and Mrs. P. T. Subasini, in the Electrical and Electronics Engineering department. The subject and unit are about induction motors and specifically discusses the concept of slip in induction motors.
Induction motors unit iii
- 1. INDUCTION MOTORS Name : Mrs.A.Sangari & Mrs.P.T.Subasini Designation : Sr. Lecturer & Lecturer Department : Electrical and Electronics Engineering Subject code : 131307 Year : II/ECE A & B Unit : IV 1
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- 22. induces a large voltage – hence large currents flow within the rotor, 22
- 23. producing a strong torque. 23
- 24. Induction Motors: Slip 24
- 25. The difference between the synchronous speed and rotor speed can be 25
- 26. expressed as a percentage of synchronous speed, known as the slip. 26
- 27. N Ns - s = 27
- 28. Ns 28
- 29. s = slip, Ns = synchronous speed (rpm), N = rotor speed (rpm) 29
- 30. • At no-load, the slip is nearly zero (<0.1%). 30