ELECTRIC DRIVES FOR WIND TURBINES

Electric motors

Cooling fans

Pitch and Yaw Drives

KONČAR - Small Electrical Machines Inc.

Fallerovo šetalište 22, 10000 Zagreb, Croatiaphone: +385 1 3667 278fax: +385 1 3667 282e-mail: export@koncar-mes.hrwww.koncar-mes.hr

Electric drives for wind turbines

Electric motorsSpecial asynchronous electric motors are developed for pitch and yaw drive in wind turbines. Long experience in electric motors production made this product extremly reliable in harsh enviroment and operational conditions. In compliance with all international mechanical and electrical standards, KONČAR-MES electric motors are optimal solution. Single, dual and triple polarity is available granting further flexibility in choice and our complete series is suitable for inverter duty.

Technical features:Power range for wind turbines: From 0,25 kW up to 30 kWFrame sizes: From IEC 71 up to size 200Mounting options: Foot IM B3, Flange IM B5 and IM B14Voltage: 230/400 - 400/690VFrequency: 50 Hz and 60 HzCompliance: IEC 60034, 60038, 60072 and 60085 73/23/EEC (filled with 93/68/EEC) and guideline 89/336/EECInverter duty: All frame sizesHousing: Aluminium and Cast ironDegree of protection: IP55Insulation Class: CLF

Main Brake Features:DC and AC supplyAdjustable braking torque

Main Options:PTC thermistorsSeparate supply forced ventilationEncoderResolverOther sensor and monitoring devicesEnforced bearingsRegreasing facilityHeatersSplined shaftMicroswitch brake feedbackAC/DC rectifierClass H insulationUL certified insulationTropicalized windingIncreased mechanical protection (up to IP66)Other duty types (S2-S10)

Cooling fansFans for cooling series VAAZ 315-1600 which are used in wind turbines for cooling of frequency inverter, tower and nacelle are part of our series of axial fans for cooling and air conditioning.

Long experience in development and manufacturing of fans and electric motors guarantee advantages such as:• Low level of noise with maintaining high air flow• High efficiency with low energy consumption• Safe working under all climate conditions• Long lifetime and service intervals• Special corrosion protection for open space installations• Operating characteristics that meets the user requirements• Adjusted for all installation positions• Low weight• A large number of design options of casing and motors

Motor gearboxes for Pitch and YawTechnical features:Torque range: 2500 - 300000 NmGear ratios: 60 - 3000Key Features: Flange mountedOutput shaft: splined or with integral pinionRugged constructionHigh torque capacityOutput shafts supported by heavy duty bearings

General features:High transmissable torqueHigh radial/thrust load capacityHigh shock resistance and designed for heavy dutyWide range of reduction ratiosHigh efficiencyCompact dimensionsLow weightLow cost

Standards:Gears are deisgned according to ISO 6336Modular designIn line or right angle designDifferent output versionsInput for IEC electric motor

Construction features:• 3 up tu 5 reduction stages (all of them with a planetary de-

sign), depending upon the total required reduction ratio. • Each stage may have from 3 up to 4 planets (to increase the

deliverable torque)• The gears are made of alloyed steel and are heat treated

(case hardening for suns & planets, induction hardening or nitriding for internal toothed rings)

• The planets are supported by roller bearings or full rollers track bearings to obtain an high efficiency during the phases of starting and running

• The output housing is made of nodular cast iron and designed to hold the heavy loads generated during the machine’s operation