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LECTURE NOTES

IARE AC Machines Page | 1 LECTURE NOTES ON AC MACHINES 2018 2019 II B. Tech II Semester (IARE-R16) Mr. K Devender Reddy, Assistant Professor Department of Electrical and Electronics Engineering INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad - 500 043 IARE AC Machines Page | 2 UNIT-I Three Phase Induction Motor Introduction The induction machine was invented by NIKOLA TESLA in 1888.

Since the flux pattern is varying sinusoidally in space, as the flux waveform rotates, the flux linkage varies sinusoidally. The rate of variation of this flux linkage will then be equal to the speed of rotation of the air gap flux produced. This sinusoidal variation of the flux linkage produces a sinusoidal induced EMF in the rotor coil.

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