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Robust, efficient synchronous motors up to 35MW

16 August 2015

WEG has introduced a series of robust and efficient synchronous motors, the SM40 series, covering the power range from 5 to 35MW.

With shaft and rotor made from a single piece of forged steel and high starting torque, the new SM40 is suitable for high-inertia applications. The rotor construction eliminates the risk of detachment of individual pole shoes or pole mounting screws.

The stator consists of high-quality, low-loss silicon steel laminations and top-grade bobbin windings insulated using a special vacuum/pressure impregnation (VPI) process. An optimised thermal design ensures uniform temperature distribution along the stator, prolonging the service life of the winding insulation.

The motors have a high starting torque and low starting current enabling users to achieve significant energy savings, which is particularly important in energy-intensive applications.  The low starting current also minimises the impact of the motor on the power supply network and means starting aids such as starting chokes, autotransformers or variable speed drives become unnecessary, thus bringing costs down further.

Equipped with an optional Sync-Rite synchronisation module, the motors can be configured to allow parameters such as excitation current, voltage and synchronisation status to be read and indicated over a BlueTooth link.

Available in frame sizes from IEC 800 to IEC 1250, these four-pole motors are designed for horizontal mounting and voltages up to 13.8kV (50 or 60Hz). The motors can be used in explosion hazard areas with certification conforming to IEC (ATEX, IEC Ex, INMETRO, TR CU or others on request) and NEC/CEC (CSA) for protection classes Ex nA or Ex pz/Ex px, as well as Class I Division 2.

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