Two alternators running in parallel supply the following loads: 1500 kW at 0.9 lagging pf                800 kW at unity pf 1000 kW at 0.8 lagging pf               600 kW at 0.8 leading pf   The load on one machine is adjusted to 2000 kW at pf 0.95 lagging. Find the load and pf of the other machine

Q: Harmonic Frequency 50 Hz 250 Hz 350 Hz 450 Hz Current Amplitude 5A 2.1 A 1.5 A 0.8 A The current…

A: Given,

Q: A 4-pole DC generator has 1,000 turns on its rotor. It is being turned by a prime mover at 4,000 RPM…

A:

Q: If you have 2 alternators delivering power to a load at a frequency of 60 hz, how can you make…

A: We know that reactive power is strongly related with excitation while active power is related with…

Q: A long shunt d.c. compound generator delivers 110 kW at 220 V. If r = 0.01 ohm, r = 0.002 ohm, and…

A: We have been given an long shunt dc compound generator as shown in figure.  Given data, Voltage (V)…

Q: Q5) An alternator has 36 slots per pole. One coil lies in the slots number 1 and 31. Calculate the…

A: The question is about winding pitch.

Q: An alternating f.e.m generator has an effective value of 2000 V and a frequency of f=100 Hz. Find…

A: An alternator f.e.m generator has,The effective voltage of the generator, .The frequency of the…

Q: A pump station uses an induction motor that requires a complex power of S1 = 55<30° kVAand a…

A:

Q: A 60 Hz alternator stator is wye connected with each phase winding having 24 turns of wire. The…

A: f=60HzT=24 turnsϕ=0.103 weber

Q: 1. Sinewave A lags sinewave B by 30°. Both have peak values of 15V. Sinewave A is the reference with…

A:

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.