Previous in Forum: Earth Loop Impedance   Next in Forum: DC Drive Prob
Close
Close
Close
6 comments
Rating: Comments: Nested
Associate

Join Date: Jan 2012
Posts: 25

By Reversing Motor

01/10/2012 8:50 AM

by reversingn motor is there any change occur to current direction

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: By Reversing Motor

01/10/2012 8:59 AM

Only if it's a DC motor, and then it depends on where the reversing switch is relative to the current detection.

__________________
"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply Score 1 for Good Answer
Member

Join Date: Jan 2012
Posts: 6
#2

Re: By Reversing Motor

01/10/2012 2:07 PM

For a three phase induction motor by reversing the direction

it will continue to draw same amount of current in same direction

provided the load remain same.

Register to Reply Off Topic (Score 5)
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#3

Re: By Reversing Motor

01/11/2012 7:09 AM

I strongly suggest that you go back to your elementary school and start learning from the first standard. In alternating current systems, in every cycle, there is a definite change in the direction of current flow. For example, if you have two nodes of an AC network, say, A1 & A2, then, let us say that in the positive half cycle of the alternating current wave, if current flows from Node A1 to Node A2, then in the following negative half cycle of the alternating current wave, current would flow from Node A2 to A1. This will happen 50 times in one second for a 50 Hertz AC Wave.

Register to Reply
Associate

Join Date: Jan 2012
Posts: 25
#4
In reply to #3

Re: By Reversing Motor

01/11/2012 9:14 AM

lol electricalexpert65

how intelligent you are looooolllllllllll

i asked a professionel question and you are saying go to school

dear my question is that when motor rotation is changed the rotating magnetic field also changes, so due to change in rotating magnetic field is there any change occur to the current direction becaz the direction of magnetic field is changed

Register to Reply
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#5
In reply to #4

Re: By Reversing Motor

01/11/2012 10:11 AM

What sort of motor is it?

lol

__________________
"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#6
In reply to #4

Re: By Reversing Motor

01/12/2012 7:28 AM

Dear friend! I have been following your postings - both your questions and your answers to others' postings. They prove "how much" more intelligent you are than me!

Now, yes! it is very true that the direction of rotation of the rotating magnetic field does change when you want to change the direction of rotation of the motor shaft. But, that is what electrical people would call "Phase Sequence" (not direction of current flow). The phase sequence implies how and when each phase would reach its positive maximum, zero, negative maximum, zero, etc. Thus, in a RYB phase sequence, if 'R' reaches peak first, 'Y' would reach its peak after 120 degrees and 'B' would reach its peak after another 120 degrees. In the phase sequence RBY, it will be reversed. Within the reversed phase sequence (or even within the nominal phase sequence) each phase or line current would keep on changing its direction in each half cycle. That is what I tried to explain you!

Register to Reply
Register to Reply 6 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

electricalexpert65 (2); king.faisal (1); PWSlack (2); zaheer khan (1)

Previous in Forum: Earth Loop Impedance   Next in Forum: DC Drive Prob

Advertisement