why DC motor body is plain cover but AC motor is different
like finse?
Answers were Sorted based on User's Feedback
Answer / avd
In AC motor load current flows in stator and causes heating
of stator. Hence to cool it down fan is provided which
cools the body. To increase area fins or plates are there
on body.
In DC motor load current flows through armature, causes
heat generation in armature. To take out the heat you need
to cooldown armature. Stator cooling is not required, hence
plan body is okay.
Is This Answer Correct ? | 7 Yes | 0 No |
what is the difference between capacitive and resistive voltage divider?
What is the type of earth fault protection used in battery? explain.
what is the formulae for calculating the cable size for a given voltage and current.
define power quality
what is difference between 2 pole structure and 4 pole structure in transformer yard
What are the commonly used schemes for the bus zone protection?
how can we know the size of cable cross-section from current rating ?
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?
What is relation between transmission lines & Communication lines ?
what is a bus post insulator? explain its application in a substation.
can induction motor run over the rated speed ?
why CT output is always raetd 5.regardsof primery curre.