Powerelectronics 340 Warner Ers Windturb Brake 0

Pitch brakes hold power in wind turbines

Sept. 15, 2009
The ERS Series of electrically-released, spring-engaged brakes serve as pitch brakes for wind turbine applications that require both “static” holding power and the ability to withstand high inertia dynamic stops in an emergency situation.

The ERS Series of electrically-released, spring-engaged brakes serve as pitch brakes for wind turbine applications that require both “static” holding power and the ability to withstand high inertia dynamic stops in an emergency situation. Each of the three blades on a typical turbine can be individually positioned (rotated) to achieve maximum efficiency while operating in changing wind conditions. An ERS68 brake is used on each of the three blades.

The electromagnetic brake is mounted outboard of an inductive encoder, which is mounted to the back of a motor to position the blades to the proper pitch. In normal use, the brake functions as a static brake to hold the blades from rotating in a power-off situation during routine maintenance or for other reasons.

However, the design spec for one major manufacturer requires the brake to also be able to make 1,000 fully loaded dynamic stops during its service life. The largest in the ERS Series, the 11.3-lb ERS68, has been tested to a capacity of more than 20,000 fully-loaded dynamic stops, surpassing the design spec by a factor of 20. The brake offers 100 ft. lb of static torque with a maximum of 2,000 rpm and a brake release time of 0.2 sec.

The new blade pitch brakes offer a one-piece design, and are fully-enclosed and painted to withstand extreme environmental conditions such as salt-spray, condensation, and water. Previous to the new design, pitch brake models have used two-piece designs that require an adapter plate, extra fasteners, and an external boot-type seal in the gap between the brake and the adapter plate to prevent contamination. For more information, visit Warner Electric.

Sponsored Recommendations

Design AI / ML Applications the Easy Way

March 29, 2024
The AI engineering team provides an overview and project examples of the complete reference solutions based on RA MCUs that are designed for easy integration of AI/ML technology...

Ultra-low Power 48 MHz MCU with Renesas RISC-V CPU Core

March 29, 2024
The industrys first general purpose 32-bit RISC-V MCUs are built with an internally developed CPU core and let embedded system designers develop a wide range of power-conscious...

Asset Management Recognition Demo AI / ML Kit

March 29, 2024
See how to use the scalable Renesas AI Kits to evaluate and test the application examples and develop your own solutions using Reality AI Tools or other available ecosystem and...

RISC-V Unleashes Your Imagination

March 29, 2024
Learn how the R9A02G021 general-purpose MCU with a RISC-V CPU core is designed to address a broad spectrum of energy-efficient, mixed-signal applications.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!