Recent content by souky101

Hi great folk I have a Century AC motor which is ¼ HP, 115 V, 60 HZ This is a Permanent Split Capacitor (PSC) motor It has 4 poles, so the running speed according to the motor equation should be: . Speed = 120x60 / p …………….. Where P = number of poles Therefore RPM = 120 X 60 / 4 = 1800 ...

. Thanks for your reply But how you can drive it mathematically .

Asin(wt)}+Bsin(wt+a) Asin(wt) +B sin(wt)cos(a) +Bcos(wt)sin(a) Asin(wt) + ksin(wt) + Lcos( wt) (A+K) sin(wt) + Lcos(wt) Fsin(wt) + Lcos(wt)

. I did the substitution but the resultant equation still contains the two variables x and y D=B(1-Axy)^2 +Ax^2 ... (1) -By+ABxy^2 +x =0 .....(2) Substitute (2) in (1) : (1-Axy) = x/By D=B(x/By)^2 + Ax^2 . This equation is still function of 2 variables x and y !

May I ask you what the name of the text editor you are using to write mathematical equations ? . Thanks for help

Thanks for your help - I will try . Thanks again

This equation is function of x and y Now how to get the minimum value of y ? and this equation is independent of the constant D though the plotted graph shape depends on the constant D ?.

2B(-Ay)+2BA^2xy^2+2Ax =0 -By+BAxy^2+x=0

2B(-Ay)+2BA^2xy^2+2Ax =0

D=B(1-Axy)^2 + Ax^2 dy/dx=0 0=2B(1-Axy)(-Ax(dy/dx) -A y(dx/dx)) +2Ax =2B(1-Axy)(-Ay)+2Ax =2B-2BAxy(-Ay) +2Ax =2B+2BA^2xy^2 +2Ax

Thanks for your reply . Yes , we can put it in this form: D=B(1-Axy)^2 + Ax^2 The graph of this equation depends on the constants D and B - but if we differentiate this equation with respect to x , dy/dx =0 , then the constant D will disappear though the graph depends on it ?? . See the...

Summary:: Differentiate an equation to get the minimum peak I have this equation: 6.3504 = 23.04 ( 1-141978.24XY)^2 + 141978.24X^2 I want to differentiate it with respect to X to get the minimum peak of Y . dy/dx =0 . See attached file Thanks for help [Moderator's note: moved from a...

Sure the permanent magnet' manufacturers follow specific practical design mathematical calculations / equations. .

Thanks for your reply. Can you illustrate with some practical example on a piece of permanent magnet..

Thanks for your reply. In the third photo I can see some kind of cloth material inserted in each slot to insulate the copper winding from the steal body. What type of this cloth material used ? Thanks for help. Sam