Frekvenční měniče Katalogy, manuály (EN+CZ)

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Vydal: ABB s.r.o, ELSYNN Autor: ABB ELSYnn

Strana 812 z 825







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The retaining rings are made high tensile strength non-magnetic steel alloy and oppose the centrifugal forces acting the rotor end coils. Two axial flow fans provide self-ventilation and the air cooled by air-to-water heat exchanger. The cylindrical rotor is forged monoblock which equally spaced slots for the rotor coils are machined around the circumference. There are two sets stator windings shifted 30° eliminate the 6th and the 18th torque harmonics. 6400 rpm In general, the mechanical and electrical design high-speed synchronous motor corresponds that standard ABB air- cooled turboalternator slightly modified for supply converter. The exciter rotor and the diode wheel are shrunk onto the end the shaft projecting from the motor bearing and are supported by third bearing. The electrically conducting slot wedges and the interconnecting retaining rings form the damper winding.Motor design Extreme left: high-speed EEx «p» synchronous motor designed for driving a five-stage compressor in a chemical plant producing ethylene Rated power: MW Speed range: 00.. High-speed synchronous motor Rated power: MW Rated speed: 6000 rpm 13 .. Established methods and the experience gained over many years can thus directly applied. This ensures that critical whirling speed cannot occur within the normal operating speed range