1. Motors | Automation | Energy | Coatings

2. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau

3. WMAGNET DRIVE SYSTEM The WMagnet Drive System is composed by a permanent magnet synchronous motor plus a frequency drive with dedicated software to maximize the performance of the application through the special characteristics that allow superior torque levels to be delivered by the motor.

4. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau Slot Magnet Special Assembly WMAGNET DRIVE SYSTEM

5. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau Reluctance and Alignment TorquesSpecial Construction MOTORES WMAGNETWMAGNET DRIVE SYSTEM

6. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau Stator Pole at 0° Zero Torque Stable balance Stator Pole at 90° Maximum Torque Rotor Rotation ALIGNMENT TORQUE Stator Pole at 180° Zero Torque Instable balance

7. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau Stator Pole at 0° Zero Torque Instable balance Stator Pole at 90° Zero Torque Stable balance RELUCTANCE TORQUE Stator Pole at 180° Zero Torque Instable balance

8. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau ALIGNMENT + RELUCTANCE TORQUE

9. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau SENSORLESS CONTROL WMagnet motors are sensorless, which means that they do not require any equipment such encoders or resolvers to indentify the exact position of the rotor. This is done through an advanced algorithm developed by WEG, which detects the variation of the inductance to obtain the precise positioning of the rotor thus allowing the correct phase switching.

10. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WMAGNET MAIN BENEFITS - Extra High Efficiency - Lighter and Compact Package - Wide speed range with Constant Torque - Lower Noise and Vibration Levels - Lower Bearing Temperature - Extended Relubrication Intervals - WISE Insulation System

11. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau EXTRA HIGH EFFICIENCY WHY DO WMAGNET MOTORS HAVE A HIGHER EFFICIENCY WHEN COMPARED TO THE SQUIRREL CAGE INDUCTION MOTORS?

12. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau SQUIRREL CAGE INDUCTION MOTORS In induction motors the magnetic flux lines produced by the stator pass through the rotor, inducing electrical currents in the aluminium bars. These currents generate a magnetic field in the rotor which interacts with the stator producing electromagnetic torques. The flux variation in the rotor and the current circulation in the bars generate losses and heat. EXTRA HIGH EFFICIENCY

13. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WMagnet motors have high energy magnets in the rotor. Due to their inherent magnetic properties, it is not necessary to induce currents and as a consequence there is not current circulation in the rotor. The flux variation is also practically null, so the Magnetic and Joule losses in the rotor are eliminated. Additionally no heat is produced in the rotor. EXTRA HIGH EFFICIENCY WMAGNET MOTORS

14. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WHY ARE WMAGNET MOTORS SMALLER IN SIZE AND LIGHTER WHEN COMPARED TO SQUIRREL CAGE INDUCTION MOTORS? LIGHT AND COMPACT

15. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau LIGHT AND COMPACT Once the rotor losses are eliminated, it is possible to raise the stator current levels, increasing in this way the torque production and keeping the same overall temperature rise. Comparing to the standard kW ratings of the induction motors, it is possible to deliver the same kW output in smaller frames, significantly reducing the weight and volume of the WMagnet solution.

16. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WHY DO WMAGNET MOTORS HAVE A WIDE SPEED RANGE WITH CONSTANT TORQUE? WIDE SPEED RANGE WITH CONSTANT TORQUE

17. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WIDE SPEED RANGE WITH CONSTANT TORQUE Induction motors are not efficient at low speeds. The cooling system efficiency is directly linked with the speed reduction. Even with the magnetic losses reduction, it is also necessary to reduce the motor current to avoid damage by high temperatures. That is why a Derating Curve is required to induction motors at lower speeds.

18. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WIDE SPEED RANGE WITH CONSTANT TORQUE WMagnet motors are more efficient than induction motors throughout the speed range, specially at lower speeds. Therefore, the cooling system efficiency reduction is compensated by the magnetic losses reduction linked to the VSD operational frequency reduction thus allowing constant torque in the entire speed range.

19. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau LOWER NOISE AND VIBRATION LEVELS WHY DO WMAGNET MOTORS HAVE LOWER NOISE AND VIBRATION LEVELS WHEN COMPARED TO THE SQUIRREL CAGE INDUCTION MOTORS?

20. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau LOWER NOISE AND VIBRATION LEVELS WMagnet motors are usually framed one or two sizes smaller than induction motors to the same kW rating. This allows for lower noise and vibration levels.

21. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WHY DO WMAGNET MOTORS HAVE LOWER BEARING TEMPERATURE WHEN COMPARED TO THE SQUIRREL CAGE INDUCTION MOTORS? LOWER BEARING TEMPERATURE

22. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau LOWER BEARING TEMPERATURE In the induction motors the heat transference from the rotor to the stator occurs through convection and radiation, whilst to the bearings is through conduction. The airgap works as a thermal insulation making the rotor heat dissipation more difficult. Therefore, a significant portion of the rotor heat is transferred to the bearings thus shortening bearing relubrication intervals and lifetime. In the Wmagnet motors there is no heat generation in the rotor, so decreasing the heat transference to the bearings.

23. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WISE INSULATION SYSTEM Aiming at extending the motor lifetime and reliability of motors fed by inverters, WEG developed the WISE system, which is the result of the enhancement of materials in all production stages related to the motor insulation system such as wires, insulating films, impregnation system and material, among other components included in the process.

24. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau TYPICAL APPLICATION The WMagnet Solution is ideal to: - Compressors - Ventilation Systems - Pump Systems - Conveyor Belts And they can also be used in: - Elevators - Any other speed variation system.

25. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau Frames IEC 132 to 250 and NEMA 213 to 404/5 Outputs from 11kW to 150kW Base speed 3000/3600 rpm and 1500/1800 rpm Maximum speed 8000 rpm (with encoder) Dimensions same as standard induction motors (IEC72) Cooling IC411 (self ventilated) CFW09-PM Sensorless Inverter Other frames and speeds under request WMAGNET DRIVE SYSTEM SCOPE

26. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WEG PERMANENT MAGNET SYNCHRONOUS MOTOR LINE

27. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau WEG PERMANENT MAGNET SYNCHRONOUS MOTOR LINE

28. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau INDUCTION MOTOR 15kW – Frame 160M 108,1 kg 0,0312 m 3 PERMANENT MAGNET SYNCHRONOUS MOTOR 15kW – Frame 132S 70,3 kg 0,0178 m 3 REDUCTION WEIGHT: 37,8kg = - 35,0% VOLUME: 0,0134 m 3 = - 42,9%

29. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau

33. Permanent Magnet Motor X Induction Motor

34. Howest Technical Seminar – 7 th October 2010 – Belgium Sebastião L. Nau

36. Thank you! Sebastião L. Nau slnau@weg.net