Danfoss supplies Finnish frequency converters to four Finnish Navy corvettes

Danfoss Drives, based in Vaasa, has supplied frequency converters for the propulsion systems of the Finnish Navy's four Pohjanmaa-class multi-purpose corvettes. The corvettes are part of the Finnish Defence Forces' Squadron 2020 project and are currently being built at Rauma Marine Constructions' (RMC) Rauma shipyard.

These frequency converters have been designed to meet the demanding operating environment of the Navy and meet the necessary requirements for environment, shock resistance, electromagnetic compatibility, and Navy and NATO compatibility.

A multi-role corvette is a warship that can effectively carry out the Navy's missions at sea all year round. In terms of performance and characteristics, these warships are designed for the changing conditions of the Baltic Sea and international missions. The entire fleet of ships in the Squadron 2020 project will be completed by 2029.

The same megawatt-class liquid-cooled frequency converters from Danfoss have previously been used on Wasalinen's Aurora Botnia passenger car ferry, which operates between Vaasa and Umeå. On the Aurora Botnia, which began operations four years ago, Danfoss frequency converters are used in a hybrid propulsion system, where the main propulsion is LNG gas and the energy storage is lithium-ion batteries. Danfoss products control the energy flows from generators up to 6 megawatts of propulsion equipment motors and, correspondingly, to 2 megawatt-hour batteries and from the batteries back to the ship and to the propulsion equipment. Danfoss technology controls a total of approximately 35 megawatts of power. Aurora Botnia was also built at RMC's Rauma shipyard.