The vafcie of transformation ratio of an induction motor can be found by__________?
Correct answer: B. short-circuit test only
- A. open-circuit test only
- B. short-circuit test only
- C. stator resistance test
- D. none of the above
Explanation
The blocked-rotor, or short-circuit, test permits comparison of the applied stator voltage with the induced rotor voltage at standstill, from which the transformation ratio is obtained. The no-load test cannot directly measure the rotor-side voltage because rotor frequency and induced voltage approach zero in normal operation.
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