I seem to have a different position in regard to answer to this question. I thought for longest time that it was 120 times that current changed direction in a 60 Hz AC system and strangely it is what you find online as well. But what is strange is that I used to find both 60 and 120 times. And also that every time current changed direction a light bulb blinked.
Then lately, just lately as of yesterday I ran in to something I had a hard time understanding. The difference between physical rotation of a rotor" and "electric cycle".
It appears that in a cycle while one leg of the rotor passes one pole of the magnet, the other leg is passing the second magnet's pole at the same time and that is one cycle. If this one full cycle implies one complete sign wave 360 degrees, then all it shows is that the second minus part of the sign wave from 180 to 360 is happening at the same time as 0 to 180 degrees. It is like drawing a sign wave with two hands. The left hand is drawing one half while at the same time the right hand is drawing the second half it. No?
Therefore for every 360 degrees of armature rotation on a two pole motor, there is two electric cycle or 720 degrees of rotation, two sine waves that is. The situation becomes even more clear if you ad two more pair poles. Yea pair poles, magnet comes in two poles, even electromagnets. With more poles you don't have to rotate the armature too many times to get the 60 HZ you want. That sheds light to that confusion. Therefore more poles of stator the slow the rpm gives you the same frequency result. No wonder an 6 pair pole motor runs with much less rotation. Someone could have really and simply said this instead of using all them big words.
That then would not mean there is change in direction of current in that full cycle. All it means that in one wire current moves one way while at the same time current moves in the opposite direction in the second wire making a loop.
Then on the second cycle the first wire is moving through the second pole of the magnet with current moving through it of course in the opposite direction, change in direction of current and the the other leg the opposite way of course.
This seem to make perfect sense and therefore light blinks 60 time and not 120 times in one second of a 60 HZ AC.
If this explanation makes crystal clear perfect sense, why no one ever told me in plain English as I just did that that sign waves that are not does not show or represent change of direction or light blinks at all. It has nothing to do with it. It is just cycle and what that cycle mean. Cycle and change of direction of current have nothing in common. No one has ever mentioned it like this anywhere?
The great blunder is that those sign waves and cycles on boards and papers have nothing to do with change of direction of current at all. They do not represent change of direction of current. It is obvious how great the confusion is. It is big. and who is at fault for god's sake.
And now that I have brought my own reason that make sense to me, why on Earth the internet all of a sudden say that direction of current change 120 times and therefore light blinks 120 times in 60 HZ. What is this a twilight zone. Google it and see it. Type, " how many times current change direction in a 60 Hz AC system?"
Now that I believe it is 60 and not 120, everyone seem to disagree with me.
So what is it going to be here now?
I have my previous post as evidence that I am not making things up. Thank god I could not delete other people's responses but my own editing them to the points of deletion after I was distraught due lots of other thick disagreements.
I find all this very interesting, bewildering, strange, crazy, bizarre. Thank god I have evidence to my claim and it is in this site. As I claimed previously last year that the current changed direction and the light blinked twice in each cycle. Unless someone comes along and say that although current changes 60 times, light blinks 120 times. That will be different.
Let me have it.
Then lately, just lately as of yesterday I ran in to something I had a hard time understanding. The difference between physical rotation of a rotor" and "electric cycle".
It appears that in a cycle while one leg of the rotor passes one pole of the magnet, the other leg is passing the second magnet's pole at the same time and that is one cycle. If this one full cycle implies one complete sign wave 360 degrees, then all it shows is that the second minus part of the sign wave from 180 to 360 is happening at the same time as 0 to 180 degrees. It is like drawing a sign wave with two hands. The left hand is drawing one half while at the same time the right hand is drawing the second half it. No?
Therefore for every 360 degrees of armature rotation on a two pole motor, there is two electric cycle or 720 degrees of rotation, two sine waves that is. The situation becomes even more clear if you ad two more pair poles. Yea pair poles, magnet comes in two poles, even electromagnets. With more poles you don't have to rotate the armature too many times to get the 60 HZ you want. That sheds light to that confusion. Therefore more poles of stator the slow the rpm gives you the same frequency result. No wonder an 6 pair pole motor runs with much less rotation. Someone could have really and simply said this instead of using all them big words.
That then would not mean there is change in direction of current in that full cycle. All it means that in one wire current moves one way while at the same time current moves in the opposite direction in the second wire making a loop.
Then on the second cycle the first wire is moving through the second pole of the magnet with current moving through it of course in the opposite direction, change in direction of current and the the other leg the opposite way of course.
This seem to make perfect sense and therefore light blinks 60 time and not 120 times in one second of a 60 HZ AC.
If this explanation makes crystal clear perfect sense, why no one ever told me in plain English as I just did that that sign waves that are not does not show or represent change of direction or light blinks at all. It has nothing to do with it. It is just cycle and what that cycle mean. Cycle and change of direction of current have nothing in common. No one has ever mentioned it like this anywhere?
The great blunder is that those sign waves and cycles on boards and papers have nothing to do with change of direction of current at all. They do not represent change of direction of current. It is obvious how great the confusion is. It is big. and who is at fault for god's sake.
And now that I have brought my own reason that make sense to me, why on Earth the internet all of a sudden say that direction of current change 120 times and therefore light blinks 120 times in 60 HZ. What is this a twilight zone. Google it and see it. Type, " how many times current change direction in a 60 Hz AC system?"
Now that I believe it is 60 and not 120, everyone seem to disagree with me.
So what is it going to be here now?
I have my previous post as evidence that I am not making things up. Thank god I could not delete other people's responses but my own editing them to the points of deletion after I was distraught due lots of other thick disagreements.
I find all this very interesting, bewildering, strange, crazy, bizarre. Thank god I have evidence to my claim and it is in this site. As I claimed previously last year that the current changed direction and the light blinked twice in each cycle. Unless someone comes along and say that although current changes 60 times, light blinks 120 times. That will be different.
Let me have it.
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