TF / TFZ / MFS — permanent-magnet generators for small hydropower, wave energy and marine PTO

Description

The manufacturer (Miltenberg, Bavaria) uses its permanent-magnet synchronous machines not only as motors but also as generators, for small hydropower, wave energy and marine hybrid systems. In the industry section “Energy”, the manufacturer highlights hydropower and higher efficiency of energy conversion, and as machine types it lists torque motors TF, high-dynamic MFS and asynchronous FQD; the TFZ torque motors of maximum torque are also named for use as hydro generators. The key project is the DIVE underwater turbine, developed by engineers of FELLA and the manufacturer for small hydropower plants: the unit operates underwater and makes it possible to generate energy on watercourses, residual-flow spillways and in irrigation systems; according to the manufacturer, only 17 % of potential hydropower sites are used. The commissioning of the first DIVE-HAX turbine with double regulation for medium heads is also noted. The slow-speed permanent-magnet generator is connected directly to the runner, without a gearbox, which simplifies the design and maintenance of the underwater unit. In the marine sector, the manufacturer together with Hybrid Ship Propulsion supplies PM machines operating as a generator (PTO) and as a motor (PTI). The generator characteristics are defined by the basic series: TFZ — up to 1 400 000 Nm, 300–4400 kW, up to 700 rpm; TF — up to 260 000 Nm, 10–4000 kW, up to 2000 rpm; MFS — up to 30 000 Nm, 20–2000 kW, up to 7500 rpm; all machines are water-cooled and use NdFeB magnets. No separate nameplate data for the generator version are given on the website. The solutions are suitable for small hydropower plants on existing heads and channels and for marine shaft generators.

Technical specifications