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1 istockphoto.com WIND ENERGY SOLUTIONS Synchronous and asynchronous generators Azimuth and pitch drives VEM WIND ENERGY 1

2 VEM drive solutions for any application We at VEM are expert partners for drive engineering, products and services with services ranging from highly sophisticated system solutions on special drives to individual components from 60 watts to 42 megawatts output. Our manufacturing depth ensures solutions tailored to specification as well as with short delivery times. Our products, drive solutions and services secure maximum productivity, reliability and efficiency. Machines for wind turbines We build asynchronous and synchronous generators at up to 8 MW as well as brake motors for azimuth and pitch drives for the wind energy industry. Our supply range for wind turbines extends to low-voltage equipment for hydraulic, lubrication and cooling units. Our engineers work closely with our partners from science and research in developing machines centred on individual user requirements, machines among the most technologically advanced on the market that play a major role in setting the standards for the product generation in wind power. Product range Asynchronous squirrel-cage machines Double-fed asynchronous machines Synchronous machines (electric and permanent-magnet) Synchronous machines in multi-pole design for gearless or single-stage gearbox solutions (on request) Output range: 1 8 MW Voltage range: ,800 V Frequencies: 50/60 Hz or converter operation Cooling methods: air-to-air, air-to-water, water jacket VEM WIND ENERGY 2

3 VEM the first choice for offshore wind generators A vision taking shape offshore wind turbines will play a prominent role in the energy supply of the future, and operating these massive installations at sea reliably and profitably requires outstanding engineering achievement. This applies especially to developing high-output wind generators. We at VEM have first-class expertise in this discipline, as our customers will testify you will find our generators in most of the world s high-performance offshore wind turbines. We have taken a leading role in the 1.5 to 8 MW output range, and our generators for direct grid coupling double-fed asynchronous and high-speed synchronous machines are also available in high-voltage versions up to 13.8 kv. Hans Hillewaert / CC-BY-SA-3.0 The Thornton Bank offshore wind farms off the Belgian coast (left) as well as Ormonde in the Irish Sea (right) run with VEM generators VEM WIND ENERGY 3

4 Quality testing at VEM We at VEM place utmost priority on product quality and customer satisfaction we use in-house test beds and testing facilities to make sure that our machines meet the quality standards required, and our high-quality engineering and qualified, experienced staff ensure that test procedures are carried out according to industry standards. We are certified according to DIN EN ISO 9001 and have extensive experience in testing requirements for a variety of certification organisations in Germany and across the world. Testing facilities with up to 6 MW testing power for large machines at our Dresden VEM location VEM WIND ENERGY 4

5 Technical benefits Our VPI (vacuum pressure impregnation) technology ensures consistently high insulation resistance in our preformed coils. Rotor windings in double-fed generators are always designed as medium-voltage coils for high voltage gradients in converter operation, and we only use stainless-steel slip rings for grounding systems to ensure that our VEM wind power generators will easily meet the specifications for operation in harsh coastal or offshore environments. Redundant grounding systems and specifically designed bearing insulation ensure safe converter operation. We have a high level of vertical integration to give us the agility and flexibility to respond quickly to customer requirements. High level of production depth a prerequisite for rapid and flexible fulfilment of customer requirements Solutions tailored to specification for special site conditions Designed for load capacity and bearing lifetime according to Germanischer Lloyd and TÜV Optimum efficiency even at partial load, noise-reduced machines Dimensional adjustments for nacelle design specifications using 3D CAD Continuous high insulation resistance on preformed coils Slip rings in stainless steel Rotor winding designed for high voltage gradients in converter operation Tried and trusted VEMoDUR-VPI-155 insulation system VEM WIND ENERGY 5

6 Asynchronous generators Double-fed induction generators (DFIGs) Technical specifications Output range: MW Voltage: 575 V, 690 V, 950 V, 3,300 V, 6,600 V, 11,000 V, 13,800 V Speed: 650 2,200 rpm (additional speed ranges available on request) Cooling methods: air-to-air (IC 611 IC 666), air-to-water (IC 81 W7, IC 86 W7) Features: Design according to DIN EN (IEC 72), generators for variable speed and fixed stator frequency; IM B3 designs according to DIN/IEC, robust, low-vibration design; IP 23, IP 54, IP 55 protection type, insulation class F, VEMoDUR-VPI-155 vacuum-pressure impregnation (VPI) insulation system; energy-efficient and environmentally friendly, highly modifiable VEM WIND ENERGY 6

7 istockphoto.com Product examples 1.5 MW (type DASAA U) Voltage: 690 V, speed: 1,800 rpm, frequency: 50 Hz 1.5 MW (type DASAB U) Voltage: 690 V, speed: 1,440 rpm, frequency: 60 Hz 2.0 MW (type DASAA U) Voltage: 690 V, speed: 1,780 rpm, frequency: 50 Hz 2.5 MW (type DASAA U) Air-to-water cooling Voltage: 660 V, speed: 1,150 rpm, frequency: 50 Hz 3.6 MW (type DASAA U) Voltage: 950 V, speed: 1,200 rpm, frequency: 50 Hz 5.4 MW (type DASAA UA) Voltage: 950 V, speed: 1,170 rpm, frequency: 50 Hz 6.5 MW (type DAMAK WF) Air-to-water cooling Voltage: 6,600 V, speed: 1,170 rpm, frequency: 50 Hz VEM WIND ENERGY 7

8 Synchronous generators Technical specifications Output range: MW Voltage: 690 V 6,600 V (converter) or up to 13.8 kv (grid) Speed: 800 2,200 rpm (additional speed ranges available on request) Cooling methods: air-to-air (IC 611 IC 666), air-to-water (IC 81 W7, IC 86 W7) Features: Design according to DIN EN (IEG 72), generators for variable speed and variable stator frequency; IM B3 designs according to DIN/IEC, robust, low-vibration design; IP 23, IP 54, IP 55 protection type, insulation class F, VEMoDUR-VPI-155 vacuum-pressure impregnation (VPI) insulation system; energy-efficient and environmentally friendly, highly modifiable VEM WIND ENERGY 8

9 Product examples 2.2 MW (type DRSYZ US) Synchronous generator, brushless excitation Voltage: 800 V, speed: 1,650 rpm, frequency: 82.5 Hz 2.5 MW (type DRSYZ USW) Synchronous generator, brushless excitation Voltage: 690 V, speed: 1,650 rpm, frequency: 82.5 Hz 2.5 MW (type DPSPZ U) Synchronous generator, permanent magnet Voltage: 690 V, speed: 1,650 rpm, frequency: 82.5 Hz 3.5 MW (type DRSYZ US) Synchronous generator, brushless excitation Voltage: 800 V, speed: 1,392 rpm, frequency: 68.1 Hz 1.5 MW/2.5 MW Synchronous generator, permanent magnet Gearless Joint services VEM WIND ENERGY 9

10 Brake motors for azimuth and pitch drives We at VEM also supply low voltage drives for wind turbines in a full line of three-phase machines. Our three-phase asynchronous brake motors feature exceptional reliability, durability and effectiveness, and are highly modifiable for universal application. We also provide powerful solutions for high-reduction precision gearboxes as used in applications that place heavy demands on torque and speed, and we have years of experience in manufacturing brake motors for high-reduction gearboxes to act as actuators in azimuth drives. You will find wind farms fitted with our low-voltage machines including offshore designs across the world. Motors for azimuth drives Output range up to 7.5 kw Design according to DIN EN (IEC 72) Robust, low-vibration design Mounted twin-face brake IP 55 protection type, insulation class F Product examples Azimuth drive mounting 3.7 kw Voltage: 690 V Y, speed: 1,200/1,800 rpm, frequency: 50/60 Hz Self-cooled brake motor, IC 411 cooling method VEM WIND ENERGY 10

11 Motors for pitch drive Output range up to 7.5 kw Incl. transmitter, special coil, condensation drainage and mounted twin-face brake Design according to DIN EN (IEC 72) Available in special coating for offshore application (KTL) Product examples Pitch drive mounting 5.3 kw Voltage: 360 V D, speed: 2,300 rpm, frequency: 78 Hz Self-cooled brake motor, IC 411 cooling method Motors in cooling systems We also deliver motors for cooling gearboxes, generators, transformers and other electrical components: Output range up to 7.5 kw Corrosion resistance available for offshore cooling systems Cold start at temperatures down to -30 C (Ex: -20 C) Special voltage Pole-changing Special design for explosion protection VEM WIND ENERGY 11

12 2014 VEM Detailed information on the homepage. SENSE EXPERIENCE EXPERIENCE VISION VEM/ E/0914 Printed in Germany. Subject to change. VEM WIND ENERGY 12

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