A shaft generator solution reduced fuel use and boosted compliance
The South Korean National Institute of Fishery Science needed a more efficient way to power its latest research vessel without exceeding space constraints or breaching new IMO 2020 emission regulations. The original design based on a European synchronous generator posed technical limitations that risked delays. Danfoss Korea stepped in with a tailored variable speed drive (VSD) system, collaborating closely with STX Engine to engineer a smarter solution.
By converting the specification from synchronous to asynchronous, the team created a simplified, higher-performing shaft generator system. It offered reliable power output, lower emissions, and better operational efficiency in a smaller footprint—ideal for the space-constrained marine environment.
One of the vessel’s biggest wins came from operating in electric propulsion mode during low-speed or part-load conditions. With the engine off, emissions fell sharply while maintaining navigational performance.
The Danfoss system also protected the generator from overload during high-draw operations such as winching—improving onboard stability and extending equipment lifespan. In total, the shaft generator setup reduced emissions by 20–30% and delivered significant long-term fuel savings.
Danfoss not only designed the power solution, they also delivered and demonstrated a complete hybrid configuration. Through local project management and site commissioning, the Korean team installed and tested the shaft generator using a Danfoss-built demo system.
This included everything from the VACON® NXP Grid Converter to the liquid cooling station and transformer, ensuring full compliance with generator standards while eliminating the need for complex AVR systems.
Whether it’s fuel efficiency or reduced onboard emissions, our shaft generator systems can deliver powerful gains for your fleet.
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Not all vessels can accommodate conventional synchronous generators. Danfoss provides smarter alternatives using asynchronous drive tech and advanced engineering support.
Unlike traditional systems, Danfoss uses asynchronous drives with built-in propulsion mode and overload protection, removing the need for AVR units.
Thanks to optimal AFE dimensioning and drive design, Danfoss systems save considerable engine room space compared to older synchronous setups.
Yes. The solution is suitable for cargo, ferries, and other marine vessels seeking lower emissions and hybrid drive performance.
You get everything needed: VACON® drives, generator converters, cooling units, transformers, and onsite commissioning.
Absolutely. The solution was specifically built to help shipbuilders comply with IMO 2020 environmental regulations.