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Switch to AC motors reduces power consumption

As one of its steps to help its customers reduce their power consumption, plastics processing machinery manufacturer KraussMaffei Berstorff now offers its range of 36D single-screw extruders with three-phase AC motors instead of DC motors.. Why?

As one of its steps to help its customers reduce their power consumption, plastics processing machinery manufacturer KraussMaffei Berstorff now offers its range of 36D single-screw extruders with three-phase AC motors instead of DC motors.. Why? Well, the main areas of heat loss in an extruder are the barrel of the plasticizing unit and the drive train - the gearbox and a conventional DC motor. The efficiency of AC-driven extruders is between 5-12% higher than the equivalent DC versions, depending on the operating point, reports the manufacturer. The AC motors also show substantially better behavior under part-load than the DC drives. KraussMaffei Berstorff also offers the water-cooled AC drives as an option for production under cleanroom conditions. KraussMaffei Berstorff, Hannover, Germany; +49 511-57020; www.kraussmaffei.de.

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