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Fukuta AEEK – a three-phase industrial motor rated at 22 kilowatts from the Taiwanese manufacturer, used for pumps, compressors and conveyor systems
Fukuta is a Taiwanese manufacturer specialising in three-phase electric motors and geared motors for industrial drive technology. The type described here, the AEEK, is among the more powerful versions in the maker's range, used for pumps, compressors and conveyor systems.
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The motor delivers 22 kilowatts, placing it at the upper end of standard drive motors that power larger pumps, screw compressors or belt conveyors. The high starting current of such motors in practice usually calls for star-delta starting or an electronic soft starter so as not to overload the supply.
In industrial motors of this kind the squirrel-cage rotor is standard, since it runs with little maintenance and needs no slip rings. The number of poles sets the synchronous speed: at 50 hertz, two-pole motors turn at 3,000 revolutions per minute, four-pole motors at 1,500 and six-pole motors at 1,000, each slightly reduced by slip. Protection ratings follow IEC 60529 and mounting arrangements IEC 60034-7, for example a foot-mounted IM B3 motor or a flange-mounted IM B5 type. Running it from a frequency inverter raises the demands on insulation strength.
When buying secondhand, the rating plate is worth checking first: output, voltage, frequency and connection type should be legible and suitable. Turned by hand, the bearings should run smoothly, without play or noise, while an insulation test with an insulation-resistance tester reveals damp or damaged windings. The fan cover and terminal box deserve a second look, since corrosion or broken ribs point to a hard working life. If the motor has been rewound, that is worth raising openly before buying.
Sources: SpecCodex-Register: Kennwerte des Modells AEEK
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