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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. Right from its inception its ease of manufacture and its robustness have made it a very strong candidate for electromechanical energy conversion.

This rotor has slots into which copper or aluminum bars are inserted. These bars are then shorted by rings that are brazed on to each of the rotor ends. Figure 9 shows a simple schematic. Figure 6: Squirrel cage rotor — a schematic Such a rotor is called squirrel cage rotor. This rotor behaves like a short-circuited winding and hence the machine

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