On 04/17/2014 08:56 AM, Viesturs Lācis wrote: > Hello! > > I have three chinese servo drives in the waterjet machine and they are > constantly faulting with "overvoltage" error. Since I have not yet added > any braking resistors, it seems obvious that I should do so. > The question is: how do I determine appropriate resistance and rated power > values for the resistor? > Motor parameters are here: > http://www.cutting.lv/fileadmin/user_upload/tg-motor.pdf > > Currently max current in motors is set to 1,4A, which makes me think that > actual motor power is 500W. > 560 V at 1.4 A is a reasonable guess. That would be 400 Ohms. A 100 W vitreous ceramic resistor works well, they take momentary overloads easily. You could probably go a little lower on the resistance without trouble. But, it is unlikely the motors will generate much more than their continuous rating while being decelerated.
Jon Jon ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
