W22 New Electric Motor Concept
High performance with maximum energy efficiency, this is the meaning of the new WEG el ectric motor. High efficiency and Low cost of Ownership throughout the entire motor lifetime have been the basis for the W22 development. A design created to anticipate concepts on performance and energy savings. A product that can operate the most of its designed lifetime consuming the minimum possible energy with high levels of productivity operating continuously without unplanned stops and with top performance, thus generating the maximum value to the user – this is what is behind W22 new concept.
Several key objectives have been achieved in the design of the W22 motor:
- Reduction of noise and vibration levels;
- Increased energy efficiency and reduced thermal footprint;
- Easy maintenance;
- Compatibility with present & future generations of frequency inverters;
- Flexible and modular design;
Cutting losses
With losses reduced by 10% to 40 % across the range, W22 industrial electric motors deliver efficiency improvements equal to or better than EU EFF1. These advances will enable the W22 electric motors to meet the latest requirements for high energy efficiency. Further development of the W22 motors will enable them to meet the Premium Efficiency Category for the USA, before 2010, and Australia's MEPS (Maximum Efficiency Program Series). To deliver these improvements at lower running and lifetime cost of ownership, WEG has undertaken extensive redesign of key parts of the motors.
Improved efficiency and reliability - the result of improved cooling
A highly critical redesign is the fan cover shape and the ventilation fan itself. The innovative WEG designs provide better airflow over the motor frame, thus maintaining temperatures within the optimum operating range and improving reliability and longevity; the design is subject to international patent applications. Additional aerodynamic improvements to the frame exterior have enhanced the airflow effectiveness and minimised any hotspots, further benefiting eliability. For example the terminal box and the central eyebolt seating have been moved to reduce air flow obstruction. The lower temperature further enhances the benefits of WEG´s unique WISE system (with international patents pending), which offer prolonged resistance to temperature degradation of the insulation.
Built-in inverter compatibility
The W22 industrial motor range has been designed from the start for operation with advanced frequency inverters, to offer flexibility and increased energy efficiency, while resisting voltage spikes and voltage rise times. It is available as a package with WEG's acclaimed CFW11 Optimal Flux Frequency inverter drives.
Substantial noise reductions
Noise levels due to the ventilating system have been substantially reduced, by between 3dB(A) - 8dB(A). This brings the W22 noise levels to between 72dB to 80dB, substantially lower than IEC recommendations and equal to or lower than competitors.
Improved durability and environmental resistance
The W22 industrial motors are constructed from WEG's own high quality cast iron, to ensure maximum durability and life under harsh conditions. Redesign of the fan cover has also ensured greater strength to resist everyday impacts and accidents. In addition, the end cover has been redesigned for improved heat dissipation from the bearings, while being strengthened for increased resistance to deformation and better bolt protection. The feet are now cast integrally with the motor frame, giving greater stiffness, better damping in high vibration installations, and ensuring flatness for easy mounting on the motor plinth. Additionally the strengthened feet have been designed with integral lifting holes; this has enabled the eyebolt seating to be removed from the frame, for more even cooling. Standard environmental protection is IP 55. This is easily upgraded to IP65 with a WEG adaptation kit, comprising a replacement housing with new bearing seals, for improved dust and water ingress protection, enabling high pressure water cleaning to be employed. This can be supplied for customer fitting, or by WEG maintenance service.
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More about WEG electric motors here |
Brochure: W22 - Three Phase Motors
Catalogue: W22 - Three Phase Motors - Technical Catalogue
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