The turbine of this wind generator has vertical axis. The electric generator is a direct drive high efficiecy, brushless, permanent magnet generator.
Horizontal axis wind turbines are typically more efficient at converting wind energy into electricity than vertical axis wind turbines. However, small vertical axis wind turbines are more suited to urban areas because they are:
Safe to people and bird
Generator can be on the ground for more easy access, rather than up in the air
:ower susceptibility to cross-winds
No massive tower structure is needed
As the rotor blades are vertical, no yaw mechanism is neeeded
Have lower wind startup
Do not need to turn to face the wind if the wind direction changes
The system converts in electricty the energy of water flowing. The turbine spin as water passes thru them. The electric generator is based on a direct drive synchronus permanent magnet brushless machine.
Advantages: environmentally friendly, flexible concept, low maintenance, generator outside of flow, no power factor compensation required
Performances: 50 kW @ 400 rpm , 94% efficiency
Direct drive generators for wind turbines
The frameless generators consist of consist of:
A stator wound with three phases coils
A rotor with high energy permanent magnets fixed on a soft iron core
Rated power: 100W to 100 kW, depending of speed and size.