Ventilation Laminations: At the Heart of Rotating Machinery Performance

Ventilation laminations play a central role in the thermal management of rotors and stators by ensuring optimized air circulation within the lamination stacks. These assemblies consist of packs of ventilated laminations, assembled using ventilation spacers made of stainless steel or carbon steel, laser welded to achieve precise and repeatable geometry. This process improves contact between laminations, resulting in enhanced performance (reduced stray current losses and optimized magnetic permeability).

Assembly is carried out using a specific laser welding process, protected by a patent filing, which guarantees reliable and durable fixation of the spacers.

This LPW (Laser Pressured Welding) technology, performed without filler material, limits thermal stresses, prevents distortion, and significantly reduces the risk of spacer pull-out under severe operating conditions. It ensures excellent mechanical strength of the lamination stacks, even under high thermal and dynamic loads.

Integrated at the core of the machines, ventilation laminations enable controlled management of internal airflow, improving the dissipation of heat generated during continuous operation.

This thermal control directly contributes to the dimensional stability of the assemblies, operational reliability, and extended machine service life.

Ventilation laminations are designed for demanding applications such as hydroelectric and wind power generators, industrial turbines, electric and marine motors, and the nuclear sector—environments where assembly precision and process robustness are critical.

Thanks to advanced technical design, controlled material selection, and a patented welding process, ventilation laminations represent a key solution for improving energy performance, reliability, and durability of equipment in the energy sector.