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WIND ENERGY DIVISION

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WIND TURBINES UNDER DEVELOPMENT
 
Among our goals as a growing organization in the field of renewable energy, at the present we are involved in the development of two wind turbines, the  WT300 and WT600.

The specialization gained in the field of wind energy has allowed us to accomplish theoretical models for applications as aerodynamic design of rotors and electromagnetic design of the axial flux permanent magnet generator. This has been possible due to the research and experimentation work done in the last years which has included  not only construction of several prototypes but also development projects that we have done for private companies and organizations.

At the following some characteristics and technical specifications of the permanent magnet generators constructed, the WT300 and WT600 are detailed, also some snap shots are shown:

 
CHARACTERISTICS

The wind turbines WT300 y WT 600 have been designed with similar characteristics:

  • Both wind turbines are up wind which means that the rotor faces the wind.

  • The rotor (made by fiberglass) has a great swept area, this is useful for a good performance of the wind turbine under low and moderated winds.

  • The axial flux permanent magnet generator works with low rotating speed (RPM). It does not have cores, therefore cogging is avoided and the wind turbine with just a light breeze starts turning.

  • DIRECT coupling between rotor and generator.

  • FURLING TAIL protection against high wind speed.

  • Low tip speed, under 75 m/s which is a low value comparing with other wind turbines available in market.

 
SPECIFICATIONS

 

 WT300 WT600
Up wind rotor Reinforced Fiberglass
Number of blades

3

3
Rotor diameter

1,86 m

2,60 m

Cut-in wind speed

2,5 m/s

2,5 m/s
Rated wind speed

10 m/s

10 m/s

Rated power

300W

600W

Rated rotor speed

580 rpm

450 rpm

Furling wind speed

12 m/s

11 m/s

Peak power

450W

740W

Rotor speed at peak power

740 rpm

510 rpm

Maximum tip speed

 72 m/s

70 m/s
Permanent magnet generator with aluminum framework anodized.  Neodymium magnets, three phase, rectified output. 
Light start up of wind turbine, wind speed less than 2 m/s  NO COGGING.
Charging voltages available (Direct current)

12, 24 V

 24, 48 V

Aerodynamic safety system. Furling tale 
Survival wind speed

35 m/s

 35 m/s

 

PERFORMANCE CURVES
ELECTRIC POWER (Estimated at 300m of altitude over sea level)
ESTIMATED MONTHLY ENERGY OUTPUT
Assumptions (Energy output may vary):

  • Inland sites, 300 m of altitude, wind frequency distribution by Rayleigh (coefficient k=2, Weibull distribution).

  • Wind speed measured at 10 m of height, wind turbine tower of 12 m.

  • Medium roughness terrains: low crops, low woods (Wind shear exponent = 0,20).

  • Constant voltage of battery bank: 12, 24 or 48 VDC.

  • No power losses in wires are considered.

SOME SNAP SHOTS

Permanent Magnet Generators of Wind Turbines WT600 (left) and WT300 (right), front view.

 

Side view of Generators, notice the shaft and conductors for electric output.

 

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