Moog’s New Pitch Control System Improves Wind Turbine Reliability by up To Three Times over Existing Systems

September 27, 2016

The Industrial Group of Moog Inc. today announced the launch of its next generation pitch technology – the Moog Pitch System 3. The first shipment of Moog Pitch System 3 is now in operation at a wind farm in Brazil, and Moog will officially unveil the system at the WindEnergy Hamburg Expo (September 27 - 30, 2016, Hall B5, Booth 222).

The new pitch system was developed to meet the growing need for wind farm operators and turbine manufacturers to reduce wind farm capital and operating expenses (CAPEX and OPEX).

“The design of the new pitch system reduces the Levelized Cost of Energy (LCoE) by increasing wind turbine reliability and minimizing downtime,” says Dennis Webster, general manager for the Wind Business Unit of the Industrial Group of Moog Inc.

Levelized Cost of Energy measures the net cost to install and operate a wind turbine against expected energy output over the course of the turbine’s lifetime. There are a number of factors that contribute to LCoE, one of the most important of which is turbine reliability. Several industry research findings[1] identify the pitch system as the No. 1-ranked component contributing to wind turbine failure and downtime. Pitch systems are exposed to harsh ambient conditions inside the rotating hub, including extreme temperature, humidity, and vibration leading to lower reliability compared to other turbine components. Though pitch systems represent less than 3 percent of wind farm CAPEX costs, they account for nearly a quarter of all downtime in turbines.

Most pitch systems used throughout the industry today consist of as many as 2,000 to 3,000 subcomponents depending on the manufacturer. With a highly integrated and optimized architecture that consists of significantly fewer parts, the Moog Pitch System 3 is up to three times more reliable than the industry’s standard pitch systems. This leads to a reduction in both turbine downtime as well as scheduled and unscheduled maintenance activities.

Francesco Vanni, Senior Engineer, Asset Integrity & Performance, DNV GL – Energy, says “We benchmarked the reliability of existing pitch systems based on operational data from the industry and compared it with the reliability numbers provided by Moog for their new Pitch System 3. Our cost of energy model suggests that reliability improvements expected for the Moog Pitch System 3 could save up to $1.70/MWh for a typical 3.0MW turbine, a significant reduction in LCoE.”

By reducing failures and downtime caused by overly complex pitch systems, the Moog Pitch System 3 improves productivity and ultimately enables wind farm operators and OEMs to be more competitive in today’s increasingly complex global energy landscape. Moog will be shipping the new pitch system to turbine manufacturers in Europe and Asia starting in October of this year.

[1] Reliawind Research 2011 and Moog / DNV GL Research 2016

About Moog

Moog Inc. is a worldwide designer, manufacturer, and integrator of precision control components and systems. Moog Industrial Group designs and manufactures high performance pitch solutions for wind turbines including pitch control systems, slip rings, blade sensing and services for wind turbine manufacturers and wind farm operators. Pitch systems monitors and adjusts the angle of the wind turbine blades and thus acts as a critical safety system protecting the turbine against adverse wind conditions. Moog Industrial Group, with fiscal year 2015 sales of US$522 million and over 40 locations worldwide, is part of Moog Inc. (NYSE:MOG.A and MOG.B), which has sales of US$2.53 billion. For more information, please visit




Photo Caption: Wind turbine cutaway rendering showing Moog Pitch System 3 in operation

Photo caption: Increased system reliability with new Moog Pitch System 3 when compared with a current industry design