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Servo Drives State of the Art in Industrial Applications - A Survey  

Kennel, R. (Wuppertal University)
Kobs, G. (BDSCH REXROTH AG)
Weber, R. (BDSCH REXROTH AG)
Publication Information
Journal of Power Electronics / v.2, no.1, 2002 , pp. 25-31 More about this Journal
Abstract
Servo drives with microcomputer control provide the possibility of using modern and sophisticated control algorithms. As an additional feature it is possible to implement parallel and/or redundant software and hardware structures to realise safe motion or similar security functions. Unfortunately microcomputer control also has some impact on the behaviour of servo drives. Control algorithm, cycle time, sensors and interface have to be perfectly synchronised. Special control schemes are necessary on the line side (power supply) to meet the actual requirements concerning EMC. This contribution presents experiences and results obtained from a modern digital drive system pointing out the influences of low and high accuracy position sensors and the interdependencies mentioned above.
Keywords
Servo drives; control synchronization; smooth motion; encoder resolution; encoder accuracy; EMC;
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