1) Three loads are connected in parallel across a 1400 V, 60 Hz, single phase as shown in below: 1400 V I Load Load 1: Inductive Load 2: Capacitive Load 3: Resistive I. II. 1₁ Load 1 1₂ Load 1 13 Load 1 Information 125 kVA, p.f =0.28 lagging 10 kW, 40 kVAR, 15 kW Find the total active power, Reactive power, Apparent power, and the power factor of power supply? A pure capacitor (c) is connected in parallel with above loads to improve the power factor to 0.8 lagging. Find the kVAR and the capacitor in µF.

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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.