Na most a Magna1 IS frekvenciaváltoztatással működik...
Motor and electronic controller
The pump incorporates a 4-pole synchronous, permanent-magnet motor (PM motor). This motor type is characterised by higher efficiency than a conventional asynchronous squirrel-cage motor. The pump speed is controlled by an integrated frequency converter.
https://api.grundfos.com/literature/Grundfosliterature-5992758.pdf