3.7M144 EBC

High performance at low wind speeds.

The Senvion 3.7M144 EBC is a low wind specialist. With its bigger rotor, a rated power of 3,700 kW and new, highly efficient rotor blades it can achieve a 6.7% higher annual energy production (AEP) than the previous 3.6M140. The new rotor blades are based on the new Rodpack technology which replaces standard glass fibre fabric in the blade’s main girder. Rodpack technology is used exclusively in Senvion rotor blades and delivers significant improvements in material properties. Last but not least, the aerodynamically optimized blade design and the use of serrations on the trailing edge make the new Senvion 3.7M144 EBC one of the quietest turbines for low wind speeds on the market.

  • Nominal power: 3,700 kW
  • Rotor diameter: 144 m
  • Hub height: 108 - 165 m / project specific

  • Wind class: Low Wind
  • Operating temperature range: -20 – +40 °C
  • Rotor surface: 16,286 m²
  • Rotor Blades

    Rodpack technology for highly efficient rotor blades
  • Wind class

    High performance at low wind speeds
  • Sound

    Low sound power level thanks to aerodynamically optimised blades and serrations

Technical data 3.7M144 EBC

Design data

Nominal power3,700 kW
Cut-in wind speed3 m/s
Nominal wind speed12 m/s
Cut-out wind speed26 m/s
Operating temperature range-20 – +40 °C


    Hub heightWind classDIBt Wind zone
    Project specificIEC S (based on IEC IIB)WZ 3


      Diameter144 m
      Rotor area16,286 m²
      Rotor speed4.8 – 9.9 1/min
      Power controlElectrical pitch

        Rotor blade

        Blade length70.5 m
        TypeGlass fiber-reinforced plastic (GFRP)
        Max. chord width4.25 m

          Electrical system

          Nominal frequency50 Hz
          GeneratorSquirrel Cage Induction Generator
          Generator protection classIP 54
          Converter typeFull converter with DC intermediate circuit
          TransformerInternal Transformer (ITS)

            Sound power level

            Maximum sound power level105 db (A)

              Power curve

              Senvion Technology

              The 3.XM series features a well-proven modular and evolutionary technology concept. The smart and robust design results in a highly efficient and reliable turbine concept: from the aerodynamically optimized rotor blade, compact and efficient drivetrain, advanced control technology right through to the transformer. This flawless interplay delivers high energy yields while keeping sound emissions low.

              Eco Blade Control

              The Eco Blade Control (EBC) generation of turbines boasts high yields at low-wind locations, an outstanding operational lifespan of 25 years, and a low sound power level. Light weight construction of the blade due to our Rodpack Technology and an advanced load management technology completes the benefits of this turbines.

              1. 1

                Generator/frequency converter

                • Variable speed range for optimum yields
                • Fully encapsulated generator with air-air heat exchanger
                • Optimum temperature inside generator, even at high ambient temperatures
                • Water-cooled converter power electronics for optimised cooling
                • The converter and controllers are located in the tower base, leaving even more space in the nacelle and making operation that much easier

              2. 2

                Gear system

                • Planetary/spur gear
                • Satisfies stringent demands in terms of service life and operating smoothness in line with Senvion gear specifications
                • Elastomeric torque arm bearing for structure-borne sound insulation
                • Low temperature thanks to efficient oil cooling system
                • Three-stage oil filter system for excellent oil quality

              3. 3

                Rotor blade

                • Individual blade profiles for optimal aerodynamics of the rotor
                • Robust aerodynamic design guarantees best possible performance, even in difficult wind conditions or when dirty
                • Proven quality, tested statically and dynamically in accordance with IEC specifications
                • Fully integrated lightning protection in accordance with IEC protection class I

              4. 4

                Pitch system

                • Virtually maintenance free electrical system
                • High-quality, large blade bearing with permanent track lubrication and external gearing
                • Integrated deflector in the spinner as protection from the elements
                • Maximum reliability through redundant blade angle detection with two independent measuring systems
                • Fail-safe design with independent drive and control systems for each rotor blade

              5. 5

                Rotor bearing and rotor shaft

                • High quality spherical roller bearing with bearing with perfectly fitted bearing housing and permanent lubrication for maximum service life
                • Rotor shaft aligned with transfer of torque

              6. 6


                • Four-point contact bearing with external gearing, powered by top quality high-performance gear motors
                • Holding brakes with hydraulic pressure accumulator for fail-safe function relieve drive systems when inoperative and stabilise nacelle
                • Minimum stress on the drive trains thanks to low friction of four-point bearing and brake release during wind tracking

              7. 7

                Holding brake

                • Generously dimensioned disc brakes hold rotor safely
                • Soft brake function for minimum wear of gearbox

              8. 8


                • Natural frequency of tower higher than rotational speed of rotor (rigid design) ensures minimum stress on tower and nacelle
                • No speed restrictions, as no frequency interference
                • Maximum component safety thanks to L-shaped flange and stress-optimised door opening


              Title File Size
              Technical specifications 3.7M144 EBC PDF 91 KB
              Senvion - Portfolio Overview PDF 1.6 MB

              Please contact the relevant company within the Senvion Group to check the availability of a given product in your country.

              Contact us

              Senvion Sales
              Überseering 10
              22297 Hamburg