MM92

Our bestseller for medium and low wind speeds

The Senvion MM92 has a rated power output of 2.05 megawatts at a wind speed of 12.5 m/s, thanks to its significantly larger rotor diameter of 92.5 metres. This makes it the ideal turbine for medium to low wind speeds. The MM92 produces energy so powerfully, efficiently and reliably that it has become our top-selling turbine. It is based on the dependable generator gearbox technology of the MM82.

  • Nominal power: 2,050 kW
  • Rotor diameter: 92.5 m
  • Hub height: 64 – 100 m


  • Wind class: Medium to High Wind
  • Operating temperature range: -20 – +35 °C
  • Rotor surface: 6,720 m²

Senvion Technology

The MM series is equipped with with a doubly fed induction generator, frequency converter and DC pitch system and and has proven its reliability for years. The heart of our wind turbines is the integrated drive train concept, where all the different components – rotor blade, planetary/spur gear, generator, converter and transformer – work in perfect harmony. This ideal interaction of the individual components delivers a high energy yield and also keeps noise emission low.

  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

  2. 2

    Gear system

    • Planetary/spur gear
    • Satisfies stringent demands in terms of service life and operating smoothness in line with Senvion gear specifications
    • 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

    Rotor hub

    • Dimensionally stable thanks to compact design and alignment with transfer of torque
    • Optimum integration of pitch drive systems
    • Generously proportioned spinner ensures safe access to hub in all weathers

  5. 5

    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

  6. 6

    Rotor bearing and shaft

    • High quality spherical roller bearing with bearing with perfectly fitted bearing housing and permanent lubrication for maximum service life
    • Q&T steel rotor shaft cast in alignment with transfer of torque

  7. 7

    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

  8. 8

    Holding brake

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

  9. 9

    Tubular steel towers

    • 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 MM92

Design data

Nominal power2,050 kW
Cut-in wind speed3 m/s
Nominal wind speed12.5 m/s
Cut-out wind speed24 m/s
Restart cut-in wind speed22 m/s
Operating temperature range-20 – +35 °C
Operating temperature range optional-20 – +40 °C

    Certification

    Hub heightWind classDIBt Wind zone
    63.75 – 64.75 mIEC IIA-
    68 – 68.5 mIEC IIA-
    78 – 80 mIEC IIA, IEC S (based on IEC IB)WZ 4, GK I
    98 – 100 mIEC S (based on IEC IIA)WZ 3, GK II
    63.75 – 100 mIEC S (based on IEC IIA)-

      Rotor

      Diameter92.5 m
      Rotor area6,720 m²
      Rotor speed7.5 – 15 1/min (+12.5 %)
      Power controlElectrical pitch

        Rotor blade

        Blade length45.2 m
        TypeGlass fiber-reinforced plastic (GFRP)
        Max. chord width3.6 m

          Electrical system

          Nominal power2,050 kW
          Nominal voltage690 V (50 Hz)/575 V (60 Hz)
          Nominal frequency50 Hz/60 Hz
          GeneratorAsynchronous double-fed generator
          Generator protection classIP 54
          Converter typeFrequency converter for double-fed induction generator
          TransformerETS (Oil transformer) ITS (Cast resin transformer)

            Sound power level

            Maximum sound power level103.2 db (A)

              Power curve

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

              Downloads

              Title File Size
              Technical overview MM92 PDF 219 kB
              Senvion - MM series PDF 2.1 MB
              Senvion - Portfolio Overview PDF 1.6 MB

              Contact us

              Senvion Sales
              Überseering 10
              22297 Hamburg