Editing I²t protection

Jump to: navigation, search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.

This page supports semantic in-text annotations (e.g. "[[Is specified as::World Heritage Site]]") to build structured and queryable content provided by Semantic MediaWiki. For a comprehensive description on how to use annotations or the #ask parser function, please have a look at the getting started, in-text annotation, or inline queries help page.

Latest revision Your text
Line 5: Line 5:
 
I²t protection continuously estimates how much motor is dissipating heat compared to its rated heat dissipation. At 100% of rated current, heat dissipation is at maximum sustainable level. Care need to be taken only when driving more current than rated current.  
 
I²t protection continuously estimates how much motor is dissipating heat compared to its rated heat dissipation. At 100% of rated current, heat dissipation is at maximum sustainable level. Care need to be taken only when driving more current than rated current.  
  
I²t algorithm will simply limit output current to rated current level if algorithm calculates that motor temperature is already at maximum. If calculated temperature is below maximum, then higher (peak) currents are allowed. In other words:
+
I²t algorithm will simply limit output current to rated current level if algorithm calculates that motor temperature is already at maximum. If calculated temperature is below maximum, then higher (peak) currents are allowed.  
* Current/torque setpoint is internally clamped to a user defined {{Param|MMC}} if I²t calculation shows temperature rise to be less than motor's maximum safe level
+
 
* Current/torque setpoint is internally clamped to a user defined {{Param|MCC}} if I²t calculation shows temperature rise to be equal or grater than motor's maximum safe level
+
  
 
[[File:Currentlimits graph i2t.png|800px]]
 
[[File:Currentlimits graph i2t.png|800px]]
Line 18: Line 17:
 
*[[Motor peak and continuous current limits]]
 
*[[Motor peak and continuous current limits]]
 
*[http://www.copleycontrols.com/motion/pdf/IsqT.pdf Copley Controls explanation of I²t method]
 
*[http://www.copleycontrols.com/motion/pdf/IsqT.pdf Copley Controls explanation of I²t method]
 
[[Category:Glossary]]
 
[[Category:Technology]]
 

Please note that all contributions to Granite Devices Knowledge Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Granite Devices Knowledge Wiki:Copyrights for details). Do not submit copyrighted work without permission!

Select categories:

To edit this page, please answer the question that appears below (more info):

Cancel | Editing help (opens in new window)

Template used on this page: