WEG motors ahead with new products
28 April 2014
WEG chose the recent Drives & Controls exhibition to showcase the W40, W50 and W60 series, the latest additions to its portfolio of three-phase induction motors, as well as a permanent-magnet motor that is one of the first to qualify for the IE5 Ultra Premium Motor designation.
With the W40, W50 and W60 motors series WEG has updated its standard industrial motor offering to incorporate advanced technology. The motors collectively cover the power range from 90 to 4250kW at frequencies of 50 and 60Hz. The three-phase induction motors are suitable for nearly all industrial applications requiring high performance and reliability, including pumps, compressors and fans.
The design has been optimised to make the motors more compact than their predecessors, with lower weight, smaller dimensions and a reduced footprint. With sturdy, innovative grey cast iron housings, they are suitable for use under extremely adverse conditions and assure low noise and vibration levels. Optimised rotor and stator laminations together with improved motor cooling give an especially high power density (ratio of output power to weight), making the standard industrial motors in the W40, W50 and W60 series among the most efficient of their sort on the market.
The two-pole and four-pole motors in the W60 series are available in frame sizes from IEC450 to IEC560, with rated power from 800 to 4250kW and rated voltage from 2300 to 10,000V. To maximise application flexibility, the motors are available in three configurations: open and self-ventilated (IC01, WP-II), closed and air/air-cooled (IC611, TEAAC) and closed with air/water heat exchanger (IC81, TEWAC).
W50 motors with two to 12 poles are available in frame sizes from IEC315 to IEC450, rated power from 90 to 1280kW, and rated voltage from 440 to 6600V. They also feature low noise and vibration levels (82 dB at 3600rpm) and are available with protection ratings from IP55 to IP66.
The open drip-proofed (ODP) W40 motors with two, four or six poles are the smallest members of the standard industrial motors family and are only suitable for applications where dirt and moisture are not factors. They are available in frame sizes from IEC280L to IEC450 with rated power from 250 to 1650kW for low and medium voltages. They have IP23 or IP24 protection rating.
With losses roughly 20% lower than Super Premium models, WEG’s new permanent-magnet motor in the W22 series is among the first Ultra Premium motors on the market to fulfils the present criteria for the potential IE5 energy efficiency class. This makes the W22 permanent-magnet motor one of the most efficient electric motors currently available world-wide.
Using innovative design, the W22 permanent-magnet motor combines unique high efficiency with compact size. Along with raising efficiency, WEG optimised motor performance to achieve lower noise and vibration emissions as well as especially low maintenance.
The new permanent-magnet motors in the W22 series are AC synchronous motors driven by CFW11 frequency inverters. The CFW11 frequency inverters have specific software for open-loop speed control of permanent-magnet motors. The software is based on a special drive strategy designed to maximise the torque per ampere. This approach makes the combination of a W22 permanent-magnet motor and a CFW11 frequency inverter a very efficient drive system that is able to deliver constant torque over the entire operating range.