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how to distinguish between ac motor and dc motor without
seeing name plate of it.only seeing its getup look

Answers were Sorted based on User's Feedback



how to distinguish between ac motor and dc motor without seeing name plate of it.only seeing its ge..

Answer / ngarjuna

Name plate details are not there so by seeing the size only
we can determine .. for the same capacity always Dc motor is
heavy in size and the length also will be more (commutator
added in dc )...

Is This Answer Correct ?    18 Yes 2 No

how to distinguish between ac motor and dc motor without seeing name plate of it.only seeing its ge..

Answer / praveen avs engineering colleg

colour difference

Is This Answer Correct ?    1 Yes 1 No

how to distinguish between ac motor and dc motor without seeing name plate of it.only seeing its ge..

Answer / gurdeep

DC motors have bolts fitted on the outer surface...whereas in case of AC motors the outer surface doesnt contains these bolts.AC motors are conpact in structure and smaller in size as compared to that of dc motors.

Is This Answer Correct ?    4 Yes 5 No

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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?

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