SAEL has initiated the drive system for the overhaul of the press section in PM3 at Pirinoli Papermill, Italy

To facilitate the huge modification of the press section, where the drive control was based on DC technology, several AC motors have been incorporated introducing a new Shoe Press by Toscotec.

Leveraging the “DCS in DRIVE SAEL” system, the paper mill’s technical team, driven by their Director Silvano Carletto, meticulously gathered and analyzed process parameters governing the targeted press section modification. This data analysis facilitated precise goal-setting for the entire press section modification, ensuring effective planning for the reconstruction process.

With this modification, the paper mill has not only enhanced the efficiency and automation of the machine but also reduced setup times and successfully achieved all predefined objectives. The Shoe Press inverter, a 400 kW motor/inverter in S1 service, was ingeniously designed with the parallelism of two 300 kW inverters, providing a single spare with half the power. This sizing strategy is projected to match the already engineered power of the future adjacent press DC motors, showcasing meticulous planning for optimal spare part utilization and cost reduction.

It’s noteworthy that each SAEL inverter is equipped with film capacitors, distinguishing them from the electrolytic ones used by competitors. This strategic choice bolsters the paper mill’s safety in terms of the operational lifespan of SAEL inverters, eliminating the need for regenerations or specific pre-charge attention often required by other products on the market.

The seamless integration of AC drives into the existing command, utilizing DC converters with over 45 years of life, originally rebuilt and reused by Ansaldo through REEBORN SAEL in 2008, is a testament to SAEL’s commitment. SAEL’s DNA guarantees, repairs, and supports all old drives, ensuring 100% interchangeability with new products. Rigorous full-load tests and verifications have resulted in a remarkable 15% increase in continuous machine speed and subsequent energy consumption savings.

The paper mill continues its strategic approach to plant renovation, aligning with the initiatives undertaken by the new management.