Analysis of a 4-Pole 3-Phase Induction Motor Operated by an Electronic Converter: Speed, Power, and Efficiency Calculation

A 4-pole 3-phase cage-rotor induction motor is operated from an electronic converter. The motor has a rated full-load speed of 1470 rpm when the converter output frequency is 50 Hz; the full-load developed torque is 150 Nm. For these conditions, determine:
(i) the synchronous speed and the fractional slip, (ii) the developed mechanical power,
[2 marks]
[2 marks]
(iii) the electrical power transferred to the rotor, (iv) the power lost in rotor resistance.
[1 mark]
[1 mark]

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