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    Italian Solar Farms, Matrix in Strategic Partnership with Energia Aljaval

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    Solek Group signs deal to build solar power plants in Chile

    Trina Solar betting on largest wafer size and third cut cells for 500W-plus modules

    TotalEnergies to Acquire SunPowers Commercial & Industrial Solar Business

    Vattenfall Wind

    UK Government grants consent for Vattenfall’s Norfolk Vanguard Offshore Wind Farm

    New DNV GL class rules for floating offshore wind energy expands industry horizon

    Norway to launch 1.5 gigawatt offshore wind tender

    Atlas and Hitachi to develop energy storage systems for renewable projects

    Velto Renewables supports the 360 MW offshore wind farm London Array

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    Array Technologies increased revenue 35% to US$872.7 million in 2020

    Array Technologies increased revenue 35% to US$872.7 million in 2020

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    Nordex Group: half-year sales rise to EUR 2 billion, earnings impacted by COVID-19

    GE Renewable Energy connects the world's most powerful hydro unit to the grid in Wudongde, China

    GE Renewable Energy connects the world’s most powerful hydro unit to the grid in Wudongde, China

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    Ferroglobe completes sale of Spanish hydro facilities to TPG Sixth Street Partners

    Intersolar, EES and Power2drive NA Acquired by Diversified Communications

    Intersolar, EES and Power2drive NA Acquired by Diversified Communications

    Summit Energy Services Announces Merger with Schneider Energy Consulting

    SeaMade secures €250m European loan for Belgian offshore wind farms

    SeaMade secures €250m European loan for Belgian offshore wind farms

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    Lightsource BP pioneers UK's first night-time solar service

    Altus Power and Heliene Establish Strategic Partnership to Support U.S. Solar Module Manufacturing

    EDP signs a Build & Transfer Agreement for a 200 MWac solar project in the U.S.

    I&M is Powering the Next Tomorrow with Plans to Add More than 2,000 MW of Solar

    WindEurope Annual Event 2022 in Bilbao - Registrations Open, Conference Programme Available

    WindEurope Annual Event 2022 in Bilbao – Registrations Open, Conference Programme Available

    RWE chooses Chantiers de l'Atlantique as key supplier for its F.E.W Baltic II wind farm - design, construction and installation of the electrical offshore substation

    RWE chooses Chantiers de l’Atlantique as key supplier for its F.E.W Baltic II wind farm – design, construction and installation of the electrical offshore substation

    EGAT deploys Siemens software solutions for the worlds largest Hydro-Floating Solar Hybrid Project

    EGAT deploys Siemens software solutions for the world’s largest Hydro-Floating Solar Hybrid Project

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    GE’s digital power transformers selected for multiple projects across the globe

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Home Press Statements

IDCON News: Carbon Brushes

in Press Statements, Thermal Power

Carbon-graphite brushes are generally limited to lower current densities (45 amps/sq.in.) and are used in older, slower speed motors with a maximum surface speed of 4000 ft./min. These are high friction brushes that make them very unattractive for present day use on commutators.

Brush grades are usually classified according to the manufacturing processes and the types of carbons, graphites and other ingredients used. The four main brush grade families are:

 

  1. Carbon graphites
  2. Electrographitics
  3. Graphites
  4. Metal graphites

Electrographitic Brushes are baked at temperatures exceeding 2,400C. These brushes are fairly porous which allows them to be treated with various organic resins. These treatments generally increase strength and improve the brush’s lubricating ability. This results in increased brush life especially in high operating temperature and low humidity environments.

These brushes are generally capable of continuous operation at 80 amps/sq.in. and at surface speeds of 7000 ft / min. These brushes are commonly found in many industrial, transportation and mining industries.

Graphite Brushes are composed of natural or artificial graphite bonded with resin or pitch to form a soft brush material. These brushes are characterised by their controlled filming and excellent riding qualities on both commutators and slip rings at brush current densities of less than 45 amp/sq.in. to 60 amps/sq.in. These are not capable of sustained operation at higher current densities.

The fast filming properties of graphite brushes is very beneficial in protecting commutators in contaminated atmospheres such as those seen in paper mills.

Metal-graphite brushes are generally made from natural graphite and finely divided metal powders. Copper is the most common metallic constituent but silver, tin, lead and other metals are sometimes used. These brushes are often ideal for a wide variety of applications because of their low resistivity, and are often the solution to particular commutation problems that cannot be solved with more conventional brushes.

The subject of carbon brushes is very complex. When finding a solution for a particular commutation problem, it takes patience, trial and error and the assistance of your carbon brush provider.

Tags: IDCON News: Carbon Brushes
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News

bp to invest up to £18 billion in UK energy system by 2030

May 14, 2022
Giant offshore wind energy projects to be built in Irelands seas
News

Kier to deliver onshore converter station for offshore wind project in the north east

February 19, 2022
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News

VSB Group Expands in France with Acquisition of 143.5 MW Wind Power Portfolio

February 19, 2022
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News

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February 19, 2022
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News

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