Previous in Forum: relay question   Next in Forum: Harmonics
Close
Close
Close
Rate Comments: Nested
Anonymous Poster

Induction motor

01/23/2010 12:20 PM

Dear friends,

someone told me that if reactance and resistance become equal in winding of induction motor, we can take best torque in this condition. is this right?

can anybody give me detail about this..

Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Power-User
Engineering Fields - Power Engineering - New Member

Join Date: Nov 2009
Location: Abuja, Nigeria.
Posts: 126
#1

Re: Induction motor

01/24/2010 7:32 AM

Its true. Since Power is a function of voltage, current and power factor, ie,

P = V X I X Pf and P = 2 X 3.14 X n x T / 60 Watts. the implication in the two equations is that

V X I X Pf = 2 X 3.14 X n x T / 60

Which inplies that T = V X I x Pf x 60 / 6.28 x n Note n as motor speed

Note, reatance and resistance can be the same only at unity pf.

Fron the derived simple equation, the torque is best at unity pf and lower at lagging pf.

Dickson. Abuja Nigeria

__________________
There is peace in silence and achievement in plans.
Reply
Reply to Forum Thread

Previous in Forum: relay question   Next in Forum: Harmonics

Advertisement