The average value of a sin wave for the complete cycle i.e 2π is given as Vavg = 2⁄π Vpeak 100 = 2⁄π Vpeak VPeak = 157 V Or Vavg = 0.636 × VPeak VPeak = 157 Now Peak to Peak Voltage is given as VPK − VPK = 2 × VPeak VPK − VPK = 2 × 157 = 314 V VPK − VPK = 314 V
The speed of the synchronous motor is given as Ns = 120f/P Therefore by changing the number of poles and frequency, we can change the speed of the synchronous motor.
Given Line Voltage VL = 400 V Line current IL = 50A Phase angle φ = 53.13 The reactive power of three-phase AC circuit is given as Q = √3 × VL × IL × sinφ Q = √3 × 400 × 50 × sin 53.13° Q = √3 × 400 × 50 × 0.8 Q = 27712.8 VAR or Q = 27.71 KVAR
EXAMIANS