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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.

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Presentation Transcript
slide3

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.

slide4

WMAGNET DRIVE SYSTEM

Special Assembly

Magnet

Slot

slide5

MOTORES WMAGNET

WMAGNET DRIVE SYSTEM

Special Construction

Reluctance and Alignment Torques

slide6

ALIGNMENT TORQUE

Stator Pole at 0°

Zero Torque

Stable balance

Stator Pole at 90°

Maximum Torque

Rotor Rotation

Stator Pole at 180°

Zero Torque

Instable balance

slide7

RELUCTANCE TORQUE

Stator Pole at 0°

Zero Torque

Instable balance

Stator Pole at 90°

Zero Torque

Stable balance

Stator Pole at 180°

Zero Torque

Instable balance

slide9

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.

slide10

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

slide11

EXTRA HIGH EFFICIENCY

WHY DO WMAGNET MOTORS HAVE A HIGHER EFFICIENCY WHEN COMPARED TO THE SQUIRREL CAGE INDUCTION MOTORS?

slide12

EXTRA HIGH EFFICIENCY

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.

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EXTRA HIGH EFFICIENCY

WMAGNET MOTORS

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.

slide14

LIGHT AND COMPACT

WHY ARE WMAGNET MOTORS SMALLER IN SIZE AND LIGHTER WHEN COMPARED TO SQUIRREL CAGE INDUCTION MOTORS?

slide15

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.

slide16

WIDE SPEED RANGE WITH CONSTANT TORQUE

WHY DO WMAGNET MOTORS HAVE A WIDE SPEED RANGE WITH CONSTANT TORQUE?

slide17

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.

slide18

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.

slide19

LOWER NOISE AND VIBRATION LEVELS

WHY DO WMAGNET MOTORS HAVE LOWER NOISE AND VIBRATION LEVELS WHEN COMPARED TO THE SQUIRREL CAGE INDUCTION MOTORS?

slide20

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.

slide21

LOWER BEARING TEMPERATURE

WHY DO WMAGNET MOTORS HAVE LOWER BEARING TEMPERATURE WHEN COMPARED TO THE SQUIRREL CAGE INDUCTION MOTORS?

slide22

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.

slide23

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.

slide24

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.

slide25

WMAGNET DRIVE SYSTEM SCOPE

  • 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
slide28

INDUCTION MOTOR

15kW – Frame 160M

108,1 kg

0,0312 m3

PERMANENT MAGNET SYNCHRONOUS MOTOR

15kW – Frame 132S

70,3 kg

0,0178 m3

REDUCTION

WEIGHT:37,8kg = - 35,0%

VOLUME:0,0134 m3 = - 42,9%

slide36

Thank you!

Sebastião L. Nau

slnau@weg.net