How are motors and drives used in a wind-turbine nacelle?

A wind turbine needs yaw brakes to hold the rotor facing into the wind. If the turbine is not facing directly into the wind, it is not producing at full capacity. When wind direction changes, a turbine’s controls instruct its yaw motors to reposition the nacelle. “In theory, this could be handled by one large

Where are hydraulics used in a wind turbine?

The muscle that pitches wind-turbine blades can come from either a hydraulic or electric device on most turbines rated at and below 2.5 MW. But for turbines over 3 MW, the job of pitching blades more often falls to hydraulics. And hydraulics can handle more. “Hydraulics in wind turbines usually refers to the assemblies for

Turbine components: bearings

Where are bearings used in a wind turbine? Although bearings are used many places throughout a nacelle, such as in the yaw and pitch bearings and on the generators, those on main shafts and gearboxes are most problematic. In main-shaft bearings, modular wind-turbine designs commonly use spherical-roller bearings (SRB) units that are more than 1m

The past, present, and future of up-tower turbine repairs

Not too many years ago, working up-tower on a wind turbine was challenging if not impossible. Nacelles weren’t designed for easy access. If anything needed fixing inside, whether it was a high-speed shaft or an intermediate bearing, down came the gearbox. What Mark Eagle, General Manager of Moventas, remembers most about those early days in

Composite manufacturer MARKOS has been EN 1090 certified

MARKOS, a composite manufacturer, has been EN 1090 certified by TÜV SÜD. The main production activity of MARKOS company is glass-reinforced plastic production of wind turbine nacelles, hub covers, as well as technical boats and other products. MARKOS also manufactures steel elements designed for wind turbine nacelles and steel or aluminum structures for other sectors.

Nacelles | How are they manufactured?

Manufacturing today’s wind turbine can involve millions of dollars and hundreds of people. To better understand what comes from the years of research and development to the final days of production, let’s tour a modern turbine production facility and see how nacelles are made. The nacelle is the part of the turbine that houses the

Wind Talk: GE discusses PowerUp, a way to increase wind farm output by up to 5%

I’m Steven Bushong, assistant editor at Windpower Engineering & Development magazine. Welcome to another edition of Wind Talk, our podcast series that gives you the opportunity to hear from the industry’s newsmakers in their own words. In this edition, we hear from Jeff Wiener, Global Sales Leader for GE Wind Services, which is part of

GE expands Brazil wind turbine production facility

GE has announced the expansion of its Campinas, São Paulo, manufacturing facility and the creation of 35 new skilled jobs. Co-located with Brazilian machinery manufacturer and GE Group subsidiary GEVISA, the facility will produce nacelles for GE’s 1.7-100 and 1.85-82.5 wind turbines. The machine head is a primary component of a wind turbine and houses

Laser cladding to make worn main shafts like new

A laser-cladding process developed by Caterpillar Inc. to repair wear and damage to large axels on mining trucks is applicable to worn or damaged main shafts of wind turbines. At a recent O&M Summit, Kristin Schipull, a metallurgist with Caterpillar (, showed how the process works and reported that repaired axels match the performance of

Nordex adjusts structures to local US market situation

Nordex SE announced today that the company will cease nacelle production at its Jonesboro, Arkansas facility after it completes the orders in its current pipeline. The decision was driven by the wind industry’s global overcapacity and the continued uncertainty and instability of the US market. The decision will not impact the current year’s business performance,