Answer / hemalatha

due to increase of air gap stator current gets increased in
turn which causes decrease of power factor..

Answer / manishsingh

air gap high = leakage flux high = mutual flux low = X high = pf low = torque low

generally we put .5mm airgap in IM

Answer / kapil bhatt

SINCE THE TORQUE DEVELOPED IN THE MOTOR DEPENDS ON THE AIR
GAP ALSO, INCREASING THE GAP WILL GIVE US A LESSER TORQUE
BECAUSE THE MAGNETIC FIELDS OF STATOR AND ROTOR WILL NOT
STRONGLY CLUTCH TOGETHER THEREBY GIVING US A LESSER SPEED.

why we multiply 11 in High Electric supply?(eg.11KV, 33Kv, 330Kv etc.)

3 Answers  

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In Battery Charger - What is the meaning of End Cell Voltage and Float Voltage.

9 Answers   FLSmidth, Focus, PSEB,

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Comparing to AC transmission, corona & R in DC transmission is……. a) lower b) higher c) same

3 Answers  

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Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

0 Answers  

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How do you convert the lt amps on a transformer to the ht amps?

2 Answers  

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how to calculate power factor rating according to load? please give the answer in simple language, i'm not electrical side

2 Answers  

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What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

4 Answers   Trident,

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How does flights get the neutral(grounding)

1 Answers  

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which %age of corona losses increses if frequency is increased to 25%.

3 Answers   ADCET, Maihar Cement,

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hi friends can u tell me name of the sites where i can get animation of electrical machines......

1 Answers  

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why do power factor in the three phase induction motor increases with the load ???.

3 Answers   Jindal,

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How does zener phenomenon differ from avalanche breakdown?

0 Answers  

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