BRAUN Windturbinen GmbH

- Model 3.5 kW - Small Wind Turbines

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Permanent-magnet rotor, brushless, gearless, maintenance-free. Extremely strong permanent magnets for a high level of efficiency. (NdFeBo permanent magnets, resistent to temperatures up to 150° C). Special ball bearings for reliably taking up radial and axial forces. 3-phase current. Separate rectifier. Either direction of rotation. Voltage 0-1000 VDC. Start of feed-in at approx. 100 rpm. Power: 3700 watts at 420 rpm and 400 VDC. Evenly rising power curve. Weight: 31kg. Aluminium housing, surface cooling, base anchoring. Gondola housing in GRP. Protection class IP56

Rotor

  • Hub connection with aluminium flange and pressure-relief plate
  • Stainless-steel screw connections with locknuts
  • Three rotor blades in Carbon
  • Computer-designed aerodynamic profile
  • Winglets on blade tips to minimise noise
  • Approx. 4.00 m in diamater
  • Weight of each blade: approx. 4.3 kg
  • Dynamically and statically balanced
  • Direction of rotation anticlockwise viewed from front
  • Max. rotational speed 300 rpm
  • GRP spinner cap
  • Rotor colour to client specification

Support element comprising:

  • Wind vane (weatherproof HDPE, off-white, slightly transparent)
  • Square stainless-steel tube as support element
  • All screw connections in stainless steel and fitted with locknuts
  • Steel bracket as support for generator, configured for plug-in connection with azimuth bearing, fully galvanised
  • Protected by patented rotor-blade positioning system
  • Mast adapter with flange connector (tube 114.3 mm)

Storm protection

  • Rotor-blade positioning (“helicopter position”)
  • Voltage monitoring with braking resistance
  • Generator short-circuit

Control cabinet

  • Control system with Turbine Power Curve
  • 3-phased grid-feed in with Smart!wind Inverter 5.5 kW;
    optional 1-phased with 1 x Power One PVI 4.5 kW
  • Control electronics with 3-phased turbine controller
  • Connections / plug connectors protected against polarity reversal
  • Controlling of the 3 alternator phases during turbinemode
  • Reset switch with key (removable)
  • Emergency-OFF switch
  • 6.0 kW braking resistance
  • Rectifier, display etc.

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