Pump drive retrofit key to energy savings in hydraulic stamping presses

Challenge:

Understand the five steps for evaluating the energy and performance benefits of a pump drive retrofit for hydraulic stamping presses

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Key Insights & Considerations:

  • Greater energy savings – intelligent adjustment of motor speed meets the load demand precisely and avoids inefficient energy waste, while eliminating heat generated by control valves, which must otherwise be dissipated by energy-wasting cooling systems.
  • Lower maintenance cost – eliminate the expense of maintaining fixed displacement pumps with relief valves, or variable displacement pumps with proportional valves, or older load-sensing directional control valve technologies.
  • Improved work environment – reduce heat load in the system and reduce average noise emissions from the hydraulic power unit by as much as 20 dB thanks to lower average pump speeds and smoother accelerations and decelerations.
  • Optimize drive and pump sizes – advanced control platform used in conjunction with an "energy on demand" system design can optimize the use of controllers along with motor and drive size for a smaller solution footprint.
  • Improved operation and equipment life – provide smooth transitions between position control and force control to generate smooth motion trajectories and multi-axis synchronization. These capabilities reduce system shocks and reduce the impact on tooling, improve dynamics and accuracy, and increase energy efficiency and productivity of the stamping press.