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Axco Generators for hydropower applications

A permanent magnet generator is a perfect choice for hydropower turbine applications. Axco permanent magnet solutions guarantee high efficiency. Our engineers help you choose the most suitable design for your hydropower project to fit units to the working environment.

Axco Generator for hydropower turbines.

Axco hydropower generators are based on permanent magnet radial flux technology. They can be easily adapted to existing powerhouse buildings. The generator structure provides good performance and high efficiency. The phase voltage and current are purely sinusoidal, and torque ripple is low.

Construction and technical performance of Axco Generators for hydropower turbine units.

Unique performance:

Superior efficiency: no mechanical drive losses
Superior reliability: no gearbox needed, power electronic components kept in minimum
Versatility: the generator can be designed to fit in old building and structures
Superior for environment: oil-free system, no gearbox
Superior cost efficiency: permanent magnet direct-on-line generator is a perfect match especially for Kaplan turbines

Customer specific approach:

Axco Generators are tailored to match the customer need and challenging conditions.
Axco Generators are designed for high efficiency to maximize the energy production.
Axco Generators give an edge in a competitive business environment.
Kaplan turbine

Axco Generator in a Kaplan turbine.

There are different options for synchronizing the generators to the grid:

Direct-On-Line (DOL) connected

General connection of turbine – generator – transformer – grid is designed for a fixed-speed drive and does not need gearbox.

Line converter connected

General connection of turbine – generator – generator converter–line converter–transformer–grid is designed for a variable-speed drive and does not require gearbox.

The direct-connected solution is simple, thus reducing the investment needed, as well as eliminating the fault possibilities in power electronics. The line converter version enables power supply in variable power situations. Often, a system of multiple generators can be built by using one power converter unit and some three to four directly connected units. We use only highly reputed converter brands in the system deliveries. The power converter can be included in Axco’s scope of supply, or excluded. In the latter case, we will assist in specifying the applicable components. The system comes also with technical support in design and commissioning.

Here you can download a brochure of our series for hydropower turbines and here a leaflet of our case reference of Fonderia HPP.


AXCO-Motors Oy, Lappeenranta, info(at)