Welcome!

News Feed Item

DHi Implements Core Exchange Program for GE and Suzlon Wind Turbine Generator Pitch Slip Rings

DHi® (Defense Holdings, Inc. ®) of Manassas Park, VA has established a Core Exchange Program for Pitch Control Slip Rings used in GE1.X and Suzlon S88 WTGs. The program is currently limited to Stemman Slip Rings only, Models 6262151, 6262290, 6262875, or equivalent, serving the North American markets (U.S and Canada). Expansion to other markets will be considered on a case basis. The Program will be jointly administered by DHi and H&N Wind (H&N).

DHi® entered the wind industry with its revolutionary Metal Fiber Brushes (MFBs) only 3 years ago under H&N’s mentorship and considerable experience. Looking first to GE WTG’s, Stemman slip ring carcasses were used under a program where H&N’s customers would be provided refurbished slip rings using DHi’s metal fiber brushes. The primary goal was to familiarize the industry with the multitude of benefits associated with DHi’s metal fiber brushes. A secondary and very important goal was to demonstrate reducing Operations and Maintenance (O&M) costs and increasing operational availability when using slip rings incorporating DHi’s MFBs. DHi’s MFBs are high capacity current collectors that far exceed the capacity and service life of the originally installed Stemmann fingers. Under the initial program, Stemman carcasses that were salvageable were refurbished and retrofitted with DHi’s MFBs on circuits 1-20, which required no periodic or preventative maintenance over the 3 year evaluation period. Circuits 21-35 retained the original Stemmann fingers and the associated periodic cleaning/lubrication requirements of the original unit.

With the metal fiber brush evaluation proven successful, our team is now providing DHi slip rings with exclusively MFB’s for the GE 1.XMW Series (SSB/Non-ESS and ESS) and the Suzlon 2.1MW S88 WTG’s. Amongst other benefits, HiPerCon® Brand metal fiber brushes are capable of operating without maintenance for the life of the turbine and can operate without concern in highly contaminated and oily environments. DHi’s slip rings are designed to replace OEM pitch control slip rings in GE 1.X and 2.5 MW WTGs, Suzlon S88 2.1 MW WTGs, and Clipper Wind 2.5MW WTGs. Designs for other WTGs are easily accomplished.

DHi’s HiPerCon® Brand Metal Fiber Brushes vs. Metal-Graphitic Brushes or “Other’ Fiber Brushes for Slip Ring Applications

DHi’s unique patented Metal Fiber Brushes, or MFBs, were originally developed under Department of Defense funding for critical submarine nuclear power plant applications. MFBs, which gain their name from the fact that they are electric brushes constructed of thousands of hair-fine silver alloy fibers running on their tips, offer significant improvement over other type brushes including carbon brushes, carbon-metallic brushes, and other metal type brushes. DHi’s brushes provide superior current and data transfer, offering extended brush and slip ring service life of at least twice the service life of carbon and carbon–metallic brushes. They easily offer high current capacity of 250 amps/sq-in and significant decreases in acoustic, mechanical, and electrical noise at sliding speeds up to 100 meters/second. These long life electric brushes produce 80% less wear debris than solid brushes and require ZERO lubrication, reducing the need for expensive maintenance and reducing the potential for short circuits and grounds. The little wear debris that is generated tends to settle to the bottom of the enclosure where it doesn’t cause problems and is easily cleaned up rather than being distributed throughout the enclosure and causing shorts, grounds, and other issues. DHi Metal Fiber Brushes are far less likely to damage the slip ring surface than carbon brushes, carbon-metallic brushes, or fingers. DHi Metal Fiber Brushes’ silver alloy fiber also offers significantly better service life and higher sliding speeds over gold wire technology at a considerable price advantage. DHi’s HiPerCon Brand MFB slip rings can be supplied as a form, fit, and function replacement to most existing slip ring designs, as demonstrated with the GE, Suzlon, and Clipper Wind WTGs. The long life, high reliability, and low maintenance of HiPerCon Brand MFBs make them ideal for wind turbine use on- and off-shore.

3 Year Assessment of HiPerCon® Brand Metal Fiber Brushes Validates Benefits in WTG Pitch Control Slip Rings

Rich Martin, DHi’s President and CEO, states, “This three year assessment validates all our previous work in bringing this slip ring technology to the wind industry. The internals of the slip rings inspected looked brand new. Anyone who has ever experienced cleaning, lubricating, or replacing a slip ring can attest to the significant savings these brushes can bring to the wind industry in reducing operational costs and increasing profits. We are really excited to be working with H&N Wind in bringing our Metal Fiber Brush technology to the wind power industry. Our new slip rings with long life electric brushes offer up to a ten-year maintenance interval (cleaning/inspection only) and at least 200 million revolution Metal Fiber Brush service life.”

Founded in 1994 and originally operated as Noesis, Inc., DHi is a privately-held business that is dedicated to overcome the limitations of legacy brushes and slip ring systems. DHi is based in Manassas Park, VA with other facilities in VA and Trenton, NC. DHi has been ISO 9001 registered since 2003 and has received numerous awards from local, states, and federal government for outstanding technical innovation and performance.

About H&N Wind

H&N Wind, A Timken Brand Company, specializes in working with customers on solving problems inherent with wind turbine generators and their associated components and provides a wide range of wind turbine parts and repairs including, but not limited to, generator, gearbox, slip ring, bearings, and electrical repair both up and down tower.

DHi Pitch Control Slip Rings can be purchased by contacting H&N Wind at (800) 795-3537.

Visit us at WINDPOWER 2014 in Las Vegas May 5–8, 2014 at the Mandalay Bay Convention Center, Booth #4259.

More Stories By Business Wire

Copyright © 2009 Business Wire. All rights reserved. Republication or redistribution of Business Wire content is expressly prohibited without the prior written consent of Business Wire. Business Wire shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon.

Latest Stories
DX World EXPO, LLC, a Lighthouse Point, Florida-based startup trade show producer and the creator of "DXWorldEXPO® - Digital Transformation Conference & Expo" has announced its executive management team. The team is headed by Levent Selamoglu, who has been named CEO. "Now is the time for a truly global DX event, to bring together the leading minds from the technology world in a conversation about Digital Transformation," he said in making the announcement.
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of the 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to gre...
DevOps is under attack because developers don’t want to mess with infrastructure. They will happily own their code into production, but want to use platforms instead of raw automation. That’s changing the landscape that we understand as DevOps with both architecture concepts (CloudNative) and process redefinition (SRE). Rob Hirschfeld’s recent work in Kubernetes operations has led to the conclusion that containers and related platforms have changed the way we should be thinking about DevOps and...
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develop...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
The next XaaS is CICDaaS. Why? Because CICD saves developers a huge amount of time. CD is an especially great option for projects that require multiple and frequent contributions to be integrated. But… securing CICD best practices is an emerging, essential, yet little understood practice for DevOps teams and their Cloud Service Providers. The only way to get CICD to work in a highly secure environment takes collaboration, patience and persistence. Building CICD in the cloud requires rigorous ar...
Companies are harnessing data in ways we once associated with science fiction. Analysts have access to a plethora of visualization and reporting tools, but considering the vast amount of data businesses collect and limitations of CPUs, end users are forced to design their structures and systems with limitations. Until now. As the cloud toolkit to analyze data has evolved, GPUs have stepped in to massively parallel SQL, visualization and machine learning.
"Evatronix provides design services to companies that need to integrate the IoT technology in their products but they don't necessarily have the expertise, knowledge and design team to do so," explained Adam Morawiec, VP of Business Development at Evatronix, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
"ZeroStack is a startup in Silicon Valley. We're solving a very interesting problem around bringing public cloud convenience with private cloud control for enterprises and mid-size companies," explained Kamesh Pemmaraju, VP of Product Management at ZeroStack, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Enterprises are adopting Kubernetes to accelerate the development and the delivery of cloud-native applications. However, sharing a Kubernetes cluster between members of the same team can be challenging. And, sharing clusters across multiple teams is even harder. Kubernetes offers several constructs to help implement segmentation and isolation. However, these primitives can be complex to understand and apply. As a result, it’s becoming common for enterprises to end up with several clusters. Thi...