A 10-hp, 230-V, three-phase Y-connected synchronous motor has a reactance of 3 ohms per phase and a negligible resistance. To what voltage must the motor is excited in order to deliver full load at unity power factor and 90% efficiency?
Added by Jacob P.
Step 1
First, we need to calculate the apparent power (S) of the motor at full load. We know that power (P) = 10 hp = 7.46 kW (since 1 hp = 0.746 kW). At unity power factor, the apparent power is equal to the real power, so S = P = 7.46 kW. Show more…
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