Is there a reason such as cost or space that an off-the-shelf drive for the motor cannot be used?
Some of the new drives have the capabilities that you are looking for built in. I was just hearing the other day about a Siemens drive that is even line power regenerative-when the motor is being used for braking the energy is not dissipated in a resistor bank, but is put back into the power line. So the braking energy is actually powering the lights in the building (for example-you could thing of it as running the air conditioning too). The energy efficiency is not quite the point here, just that a drive may be available for that motor that already has the drive/braking capability you need. Unless you are wanting to work it out for the fun of doing it, which is something I completely understand! Javid ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
