ram14375 Posted October 9, 2008 Report Share Posted October 9, 2008 hello everybody what could be the reasons for drive tripping with armature overvoltage whil running . regards ram Link to comment Share on other sites More sharing options...
marke Posted October 9, 2008 Report Share Posted October 9, 2008 Hello Ram Over voltage is generally due to an "overhauling" load. i.e. the load is driving the motor rather than the motor driving the load. This must be a single quadrant drive?? A four quadrant drive would dump the excess back into the supply. Best regards, Mark. 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...
ram14375 Posted October 12, 2008 Author Report Share Posted October 12, 2008 dear Marke Thanks for your inputs Yes this is a single quadrant dc drive used as sepol drive in our cement mill application how this can be avoided the drive is of abb make dcs 501 regards ram Link to comment Share on other sites More sharing options...
marke Posted October 17, 2008 Report Share Posted October 17, 2008 Hi ram Using a four quadrant drive will overcome this. Some drives allow you to add "braking" resistors that will absorb the extra energy. Best regards, Mark. 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...
AB2005 Posted October 18, 2008 Report Share Posted October 18, 2008 Or you can make some changing in your wiring as when the load drives the armature, it may isolate from drive. It depends upon your application and number of starts and stops/hour. "Don't assume any thing, always check/ask and clear yourself". Link to comment Share on other sites More sharing options...
gerryroxas Posted October 23, 2008 Report Share Posted October 23, 2008 Hi, You may check the voltage feedback circuit, it may not sending the proportional feedback to the drive.Feedback circuit maybe derived from encoder, tacho generator or Armature voltage divider circuit, you may try to check also the voltage feedback "IR compensation circuit" (if fitted). Most of our experience with over voltage fault is due to lost of voltage/speed feedback, voltage unstability maybe due to mechanical reason as well, i.e loose shaft coupling keys to encoder or tachogenerator. Regards, Gerry Link to comment Share on other sites More sharing options...
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