Pulse compensation

A well-known problem with drives that has not yet been adequately addressed is the unwanted excitation of machine frames and other components. In the form of vibrations and noise, drive pulses primarily cause power to be lost during operation. Furthermore, drives can be damaged by the pulses and their service life can be impaired. Maintenance costs increase, the environment is polluted and the neighbourhood is disturbed. In order to counteract these negative effects, compromises in the dynamics of the systems are usually accepted. Pulse-compensated drives are intended to minimise these effects in future.

The innovative ImPosAnt development project from the Control Engineering department at TU Dresden is opening up new perspectives. Firstly, the participants simulated the oscillating mould. A technology demonstrator with linear motors and a servo amplifier was then constructed. The pulse-compensated drive was realised by specifically controlling a useful drive and a compensation drive so that the resulting pulses are compensated or minimised. The compensation or minimisation of pulses contributes specifically to increasing the performance and efficiency of the drive. Reduced vibration development can extend the service life and reliability of the drive and reduce maintenance requirements. Noise levels are also reduced during operation, thus protecting the immediate working environment. Last but not least, pulse-compensated drives have a positive impact on the environment thanks to the sum of their advantages. The ImPosAnt project therefore has real potential for developers, supporters and co-operation partners. The functionality is implemented as a technology function adapted to the customer application in the JAT servo drives.

 

Pulse compensation at a glance


Advantages:

  • Up to 83% increase in contour timers
  • Higher throughput for the machine user
  • Extremely rigid machine frame, for example made of granite, is no longer necessary
  • Eliminates the need for time-consuming transport of extremely heavy frames
  • Less ceiling load
  • Reduced vibration development guarantees a longer service life
  • Reduced maintenance requirements

 


Conclusion:

  • Contour accuracy has been improved by 83 % with pulse compensation.
  • The solution is integrated into the servo drive. No additional hardware is required and it works independently of the controller