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Brush and collector ring system is applied to rotating machines, such as large synchronous generator for thermal and hydraulic power plant and large AC synchronous and wound rotor induction motors for industrial applications. Recently as results of power electronics technology & microcomputer control technology, inverter fed AC adjustable speed large synchronous motor for steel rolling mill and...
In large turbine generators for thermal or nuclear power plants, such as 1000 MVA power plants, brush & collector ring sliding contact operation characteristics, where more than 5000 A field exciting current flows, are one of the most important problem for its reliability. In case of turbine generator collector ring, ring material is usually made of steel, as a view point of mechanical strength...
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