00:01
Hello students, here we have a 220 volt three -phase and six -pole 50 hertz induction motor is running.
00:26
So, from this we have to calculate the speed of the magnetic fields in rpm.
00:33
So, we can write n is equal to 120 f divided by p.
00:48
So, here f equal to the frequency that is 50 hertz and p equal to number of poles that is 6.
00:59
So, we can get n is equal to 120 into 50 divided by 6 that is equal to 1000 rpm.
01:13
Then section b we have to calculate the speed of the rotator in revolution per minute.
01:26
So, here that can be written as n equal to 1 minus s into ns.
01:36
So, we can write here s is here is equal to 1 .5 plus 2 percentage.
01:51
So, we will get 3 .5 percentage...