HM 170.70, together with the HM 170 wind tunnel, allows you to demonstrate a wind turbine with rotor blade pitching and variable-speed generator. The wind turbine is connected to the wind tunnel. The axial fan in the wind tunnel has a variable speed and provides the air flow required for the experiments. A flow straightener ensures consistent and low-turbulence flow. The generator is driven directly by a 3-blade rotor. A servo motor is used to change the angle of the rotor blades. The wind turbine stands on a tower.
In order to approach different operating points, the nominal speed of the generator can be set via a controller. The rotor speed is precisely measured by Hall sensors built into the generator. The wind velocity is measured by a horizontally adjustable sensor, so that the average wind velocity over the rotor surface can be recorded. The measured values are transmitted via USB directly to a PC where they can be analysed using the GUNT software included. The GUNT software calculates the converted electrical power, the generator torque and system-specific parameters. Additionally, the network capable GUNT software makes it possible to observe, acquire, and analyse the experiments at any number of workstations via the customer’s own network with just one licence.
The rotor blades can easily be replaced. Rotor blades with straight and with optimised profiles are included to allow you to investigate different shapes. Using suitable 3D design and printing processes, you can also use new rotor blade shapes you develop yourself.
The wind tunnel is closed during the experiments to ensure that the experiments are conducted safely. A transparent protective cover ensures safe operation.