Patent ID: 6011367
Filing Date: 2000-01-04
Classification: B60L,Y02T

Abstract:
Control device for linear-motor-driven equipment, in particular for the drive of tenters of a film stretching plant, having the following features,having a central control device (1) and a multiplicity of converters (11) that are activated thereby, at least indirectly,in each case at least one zone (5) of a primary part of a linear motor system (2) is assigned to the converters (11), the stator windings (7) of the linear-motor drive that are provided in the said system being able to be activated in order to drive at least one secondary part that can be moved along the primary part,the stator windings (7) in the individual zones (5) can be activated, via the converters (11), in such a way that phase profiles or speed profiles that are passed through periodically in each case at the end of one zone (5) and at the beginning of a subsequent zone (5) are matched to one another,each converter (11) is or groups of several converters (11) are assigned a separate computer unit (17, 19),the phase profiles or speed profiles are stored in the respective computer unit as a function of clock signals,in the relevant computer units (17, 19), the appropriate data for activating the stator windings (7) in the relevant zones (5) can be calculated and/or generated from the phase-profile data,characterized by the following further featuresa phase profile, which describes a relationship between the phase angle, the current amplitude and the clock signals, for activating the stator windings (7) in an associated zone (5), is stored in the computer units of the converters (11), anda synchronization device, via which the clock signals in the converters (11) can be synchronized with one another during operation, is provided.