3.7M144 EBC

High performance at low wind speeds.

The new Senvion 3.7M144 EBC is a light 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). The new rotor blades – also used with the 3.4M140 and 3.6M140 – 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

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.

The EBC platform - Dependable, durable and suitable for higher wind classes

The Eco Blade Control generation of turbines, based on the EBC platform, was introduced in 2015. It 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

    Azimuth

    • 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

    Tower

    • 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

Technical data

Design data

Nominal power 3,700 kW
Cut-in wind speed 3 m/s
Nominal wind speed 12 m/s
Cut-out wind speed 26 m/s
Operating temperature range -20 – +40 °C

Certification

Hub height Wind class DIBt Wind zone
108 – 165 m IEC IIB, IEC IIIA WZ 3
* IEC IIB, IEC IIIA WZ 3
  • * project-specific

Rotor

Diameter 144 m
Rotor area 16,286 m²
Rotor speed 4.8 – 9.9 1/min ( %)
Power control Electrical pitch

Rotor blade

Blade length 70.5 m
Type Glass fiber-reinforced plastic (GFRP)
Max. chord width 4.25 m

Gear system

Type Three-stage planetary / spur gearbox
Type of suspension Three-point contact suspension

Electrical system

Nominal power 3,700 kW
Nominal voltage 630 V
Nominal frequency 50 Hz
Generator Asynchronous generator (squirrel cage rotor)
Generator protection class IP 54
Converter type Full scale converter with direct voltage intermediate circuit
Transformer Internal Transformer (ITS)

Sound power level

Maximum sound power level 105 db (A)

Power curve

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

Phone: +49 40 5 55 50 90-0
Fax: +49 40 5 55 50 90-39 99
sales[at]senvion.com