Трехфазный двигатель W21 для беличьей клетки с алюминиевой рамой переменного

W21 Squirrel Cage Motor

At the same time as efficiency initiatives make an impact in traditional market sectors, the application of new technologies in emerging sectors is resulting in profound changes in the way that electric motors are applied and controlled. By integrating these changes together with the demands for increased energy efficiency, WEG has taken up the challenge and produced a new design of high efficiency motor; one motor that recognised worldwide for its quality, reliability and efficiency.
Using the latest generation of computerised tools, such as structural analysis software (finite element analysis) and computer fluid dynamics, as well as electrical design optimisation software, an innovative - next generation -product has been developed: the W21 motor.

Several key objectives have been achieved in the design of the W21 motor:
1), Reduction of noise and vibration levels
2), Increased energy efficiency
3), Compatibility with present & future generations of frequency inverters
4), Global design
5), Global warranty

The W21 line from WEG is the first complete range of IE4 motors available to Industry

The Premium Efficiency (IE4) level established in IEC 60034-30-1.2014 is considered the highest efficiency class which a squirrel cage induction motor can achieve whilst remaining economically viable.
It is also the optimum solution to increase the efficiency of an existing application through direct replacement.
So, why have IE4 motors not become the Industry standard?It may be argued that IE4 motors are also premium in price
when comparing against IE2 and IE3 efficiency motors.While this is not strictly untrue, it should be appreciated when
considering their lifetime that the cost of acquisition typically represents only 1% of the total cost of ownership of an electric motor. In contrast, the associated energy savings provided by IE4 motors far outweigh this additional investment in purchase price.