Patent ID: 6577095
Filing Date: 2003-06-10
Classification: G05B,H02P

Abstract:
A modular machine controller comprising a plurality of three phase electric servo motor drive modules, an axis module which accepts servo motor shaft rotational position information and in response to broadcast current command vector information, and means in each servo motor drive module to including a digital signal processor to selectably accept the broadcast current command vector information and in response to convert the selected current command vector information into three separate motor drive currents separated in phase by 120Â°,means to selectably gang at least two servo motor drive modules in parallel to supply three phase current to a single servo motor, means including said digital signal processor to synchronize corresponding phases of the at least two servo motor drive modules in response to the broadcast current command vector information, and means in each servo motor drive module to prevent destructive current flow between ganged servo motor drive modules by individually filtering each of said three separate motor drive currents whereby the rate of change of current flow in each servo motor drive module is current limited.