
How does a soft stater work?
#1
Posted 08 August 2002 - 06:16 AM
Thanks,
milliamp
#2
Guest_little buddy_*
Posted 18 August 2002 - 11:03 AM
There are several possible ways in which the speed of an induction motor may be varied which include changing the number of poles, altering the frequency, altering the rotor resistance and changing the line voltage to name a few.
Modern Soft starters utilize the latter in it's control of induction motors by adjusting the voltage as seen by the induction motors stator terminals using SCR's.
The basic principle behind a soft starter is that torque developed by an induction motor is propotional to the square of the voltage applied to it's stator terminals or quite simply, by using an ac controller the voltage applied to the motor can be controlled from nill to that of the value of the supply and the resulting torque is the square of the applied voltage.
I hope this answers your question millivanilli, sorry milliamp
#3
Posted 19 August 2002 - 06:27 AM
Thanks for the detailed response, but I would like some more information if possible.
What are SCRs?
How do they control the voltage to the stator?
Thanks,
milliamp
PS: What's with the millivanili comment?

#4
Posted 14 September 2002 - 09:15 AM
Best regards,
Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters
#5
Posted 06 September 2009 - 12:53 AM
Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters
#6
Posted 04 August 2010 - 02:26 AM
Thanks,Hopes to hear you soon.
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