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Q#1 Inverter GATE EE 1995 MCQ +1 mark -0.33 marks

An inverter capable of supplying a balanced three-phase variable voltage variable frequency output is feeding a three-phase induction motor rated for 50Hz and 440V. The stator winding resistances of the motor are negligible small. During starting, the current inrush can be avoided without sacrificing the starting torque by suitably applying:

Low voltage at rated frequency

Low voltage keeping the V/f ratio constant

Rated voltage at low frequency

Rated voltage at rated frequency

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