Assume that a three-phase 500 hp 60 Hz 4160 V wye-connected induction motor has a full- load efficiency (n) of 88% and a lagging power factor of 0.75 and is connected to a feeder. If it is desired to correct the power factor of the load to a lagging power factor of 0.9 by connecting three capacitors at the load, determine the following: a. The rating of the capacitor bank, in kilovars b. The capacitance of each unit if the capacitors are connected in delta, in microfarads c. The capacitance of each unit if the capacitors are connected in wye, in microfarads a VLL=4160V VLL=4160V Motor 500.hp pf1=0.75 Lagging

Q: 1. A six-pole, three-phase induction motor runs at 970 rev/min at a certain load. If the stator is…

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A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Assume that a three-phase 500 hp 60 Hz 4160 V wye-connected induction motor has a full- load…

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A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.