Q2/a3-phase, 410V, 4-poles, 50Hz, star connected SM has Zs= 0.7+j5.892/phase. The motor takes a current of 19A at 0.8 leading power factor. Find the excitation emf and load angle. If the load angle at no load is 1.5 mechanical dree with same excitation voltage, find the friction and windage torque.

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Q2 a3-phase, 410V, 4-poles, 50Hz, star connected SM has Zs=
0.7+j5.892/phase. The motor takes a current of 19A at 0.8 leading power
factor. Find the excitation emf and load angle. If the load angle at no load
is 1.5 mechanical dree with same excitation voltage, find the friction and
windage torque.
Transcribed Image Text:Q2 a3-phase, 410V, 4-poles, 50Hz, star connected SM has Zs= 0.7+j5.892/phase. The motor takes a current of 19A at 0.8 leading power factor. Find the excitation emf and load angle. If the load angle at no load is 1.5 mechanical dree with same excitation voltage, find the friction and windage torque.
W
Jo. 03
W
SI
N₂.
30
λ Z₁=0.7+j5-8₁ P=2
Ia=19A, Pf=0.8 Led, Ep=
Eo=?
(2)
PFW
Gof
P
Solution
E =
I
-
V=410v
Eo = VP- Ia Ratj x5 = 236.713 - 19 <-18.21 x 0.7 +5.8)
307.6 18.21 V
• 1500
Pin- Prut PFW + P devop
Pin = √3 IV C054 = √3x410 x 1920-8-10-794kw
Pau= 3 I₂R= 3x19x0.7 - 758.1 W
ZS=
Pdtop= 3x (236.173)²
T²
Pderop= 3xVxE
Sin S
1323
L=3× 1·5X P=3 at no Lood Vo=E0=236.173
урт
410
13
√√ R²+ Xs² = √√√√0.7²4+ 5.8² = 5.84
5-84
PFw= 10.794KW - 758,1-1506, 433
PFw=8529-467
سؤال مهم جداً
= 236.173
8529-467 x 60
Load Ange= -1 8-21
B00X2X
x Sin C3) 150 64433
54.3 N-m
HYS
05022
ENU
OK
TEXTICC
(GE
Transcribed Image Text:W Jo. 03 W SI N₂. 30 λ Z₁=0.7+j5-8₁ P=2 Ia=19A, Pf=0.8 Led, Ep= Eo=? (2) PFW Gof P Solution E = I - V=410v Eo = VP- Ia Ratj x5 = 236.713 - 19 <-18.21 x 0.7 +5.8) 307.6 18.21 V • 1500 Pin- Prut PFW + P devop Pin = √3 IV C054 = √3x410 x 1920-8-10-794kw Pau= 3 I₂R= 3x19x0.7 - 758.1 W ZS= Pdtop= 3x (236.173)² T² Pderop= 3xVxE Sin S 1323 L=3× 1·5X P=3 at no Lood Vo=E0=236.173 урт 410 13 √√ R²+ Xs² = √√√√0.7²4+ 5.8² = 5.84 5-84 PFw= 10.794KW - 758,1-1506, 433 PFw=8529-467 سؤال مهم جداً = 236.173 8529-467 x 60 Load Ange= -1 8-21 B00X2X x Sin C3) 150 64433 54.3 N-m HYS 05022 ENU OK TEXTICC (GE
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