superabu Posted October 27, 2002 Report Share Posted October 27, 2002 hi, do anyone of u know thatwhy when we swap any two input of 3 phase induction motor, the rotor will then change rotation direction. I.E. close-wise to anti-clock-wise, OR vice-versa. Link to comment Share on other sites More sharing options...
marke Posted October 27, 2002 Report Share Posted October 27, 2002 The rotor spins in the same direction as the magnetic field.If you have a single coil only, driven by an A.C. voltage, you will in effect have two equal counter rotating magnetic fields. Adding a second coil physically displaced and driven by a phase shifted voltage, will result in reinforcement of one rotating field and give effectively a single rotating field. Likewise adding a third coil has the same result.Reversing two phases will alter the relative pahse shift of the voltage applied to the coils and result in a counter rotating field. You could draw out the vectors at different parts of the cycle to see what the field is doing.Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now