Frequency And Torque
Posted 05 October 2012 - 06:54 PM
Can someone say me in which case the torque of an induction motor starting at lowered voltage will be higher :
1. When the voltage frequency is not changed
2. Or when the frequency is proportionally lowered ?
Posted 06 October 2012 - 06:10 AM
If you reduce the voltage and keep the frequency constant, then the V/Hz ratio is reduced, the flux in the iron is reduced and the torque is also reduced.
If you reduce the voltage and frequency proportionally, the V/Hz ratio remains constant and the troque does not change.
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | LMP Software | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | Soft Starters
Posted 06 October 2012 - 07:12 PM
Thank you very much, I also thought so, you confirmed it (was a bit in a doubt about that however)
My best regards
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users