ETO ETO Exam papers 📅 Dec 2023

Exam Question

Compare methods of obtaining speed regulation of three-phase induction motor generally used in tanker by means of:

(a) Rotor resistance

(b) Cascade system

Give examples where each system may be employed with advantages (16)

Reference Answer

Comparison of Speed Regulation Methods for Three-Phase Induction Motors Used in Tankers
(a) Rotor Resistance Method
Principle:
Additional resistances are inserted into the rotor circuit (applicable only to slip-ring induction motors ).

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