wmagnet drive system

Motors | Automation | Energy | Coatings

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


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.


Slot MagnetSpecial Assembly

WMAGNET DRIVE SYSTEM


Reluctance and Alignment Torques Special Construction

MOTORES WMAGNET WMAGNET DRIVE SYSTEM


Stator Pole at 0°Zero Torque

Stable balance

Stator Pole at 90°Maximum Torque

Rotor Rotation

ALIGNMENT TORQUE


Instable balance



Instable balance


Stable balance

RELUCTANCE TORQUE


Instable balance


ALIGNMENT + RELUCTANCE TORQUE


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.


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


EXTRA HIGH EFFICIENCY

WHY DO WMAGNET MOTORS HAVE A

HIGHER EFFICIENCY WHEN COMPARED TO

THE SQUIRREL CAGE INDUCTION MOTORS?


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.



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.


WMAGNET MOTORS


WHY ARE WMAGNET MOTORS SMALLER IN

SIZE AND LIGHTER WHEN COMPARED TO

SQUIRREL CAGE INDUCTION MOTORS?

LIGHT AND COMPACT


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.


WHY DO WMAGNET MOTORS HAVE A WIDE

SPEED RANGE WITH CONSTANT TORQUE?

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.



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.


LOWER NOISE AND VIBRATION LEVELS

WHY DO WMAGNET MOTORS HAVE LOWER

NOISE AND VIBRATION LEVELS WHEN

COMPARED TO THE SQUIRREL CAGE

INDUCTION MOTORS?


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.


WHY DO WMAGNET MOTORS HAVE LOWER

BEARING TEMPERATURE WHEN COMPARED

TO THE SQUIRREL CAGE INDUCTION

MOTORS?

LOWER BEARING TEMPERATURE


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.


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.


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.


• 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


WEG PERMANENT MAGNET SYNCHRONOUS MOTOR LINE

15 160M 26.9 92.5 0.880 30 132S 24.3 95.8 0.984 2418.5 160L 33.1 93.1 0.880 38 132M 29.9 95.8 0.98 3022 180M 39.6 93.7 0.870 45 160M 36.4 95.8 0.984 3830 200L 54.8 94.0 0.850 60 180M 48.7 96.2 0.988 6037 200L 65.8 94.6 0.870 70 180L 57.4 96.4 0.991 6045 225S/M 79.7 94.7 0.870 86 200M 73.3 96.6 0.965 7055 250S/M 94.9 95.0 0.890 105 225S/M 88.6 96.6 0.965 8675 280S/M 130.0 95.6 0.880 142 225S/M 116.4 96.9 0.989 14290 280S/M 157.0 95.8 0.870 180 225S/M 139.7 97.1 0.985 142110 315S/M 190.0 95.8 0.880 211 250S/M 168.8 97.3 0.985 168132 315S/M 227.0 96.0 0.880 240 250S/M 216.4 97.4 0.963 218160 315S/M 272.0 96.2 0.890 312 250S/M 251.3 97.5 0.958 253

Efficiency (%)

Pow er Factor

DRIVE (A)

PREMIUM EFFICIENCY - EUROPE 400V - 3000 rpm PERMANENT MAGNET MOTORS - 400V - 3000 rpmOutput (kW)

FRAME Current (A)Eff iciency

(%)Pow er Factor

DRIVE (A) FRAME Current (A)


WEG PERMANENT MAGNET SYNCHRONOUS MOTOR LINE

11 160M 21.3 91.2 0.820 24 132S 17.9 93.6 0.953 2415 160L 28.4 91.8 0.830 30 132M 24.1 94.0 0.956 24

18.5 180M 36.2 93.4 0.800 38 160L 30.2 94.4 0.945 3022 180L 39.9 93.7 0.860 45 180M 35.3 94.9 0.974 3830 200L 56.0 93.9 0.830 60 180L 47.9 94.9 0.965 4537 225S/M 65.8 94.1 0.870 70 200M 60.5 95.9 0.954 6045 225S/M 78.6 94.4 0.880 86 200L 71.9 96.0 0.945 7055 250S/M 95.8 94.6 0.880 105 225S/M 89.2 96.1 0.948 8675 280S/M 129.0 95.2 0.880 142 250S/M 118.7 96.7 0.938 14290 280S/M 159.0 95.3 0.860 180 250S/M 145.2 96.7 0.92 142

Current (A)Efficiency

(%)Pow er Factor

DRIVE (A)

PREMIUM EFFICIENCY - EUROPE 400V - 1500 rpm PERMANENT MAGNET MOTORS - 400V - 1500 rpmOutput (kW)

FRAME Current (A)Efficiency

(%)Pow er Factor

DRIVE (A) FRAME


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%


15.0 160M 108.1 132S 70.3 - 35.0 %18.5 160L 120.8 132M 75.1 - 37.8 %22.0 180M 172.1 160M 140.8 - 18.2 %30.0 200L 225.0 180M 201.6 - 10.4 %37.0 200L 240.9 180L 218.6 - 9.2 %45.0 225S/M 407.1 200M 281.1 - 31.0 %55.0 250S/M 455.6 225S/M 392.5 - 13.9 %75.0 280S/M 643.3 225S/M 463.8 - 27.9 %90.0 280S/M 682.5 225S/M 503.2 - 26.3 %

110.0 315S/M 806.0 250S/M 546.5 - 32.2 %132.0 315S/M 868.5 250S/M 569.7 - 34.4 %160.0 315S/M 995.3 250S/M 594.8 - 40.2 %

EUROPEAN MARKET - 3000 rpm

INDUCTION MOTOR PERMANENT MAGNET MOTOROutput (kW)

FRAMEWEIGHT

(kg)FRAME

WEIGHT (kg)

Weight Reductio


15.0 160M 0.0312 132S 0.0178 - 42.9 %18.5 160L 0.0336 132M 0.0196 - 41.7 %22.0 180M 0.0461 160M 0.0312 - 32.3 %30.0 200L 0.0668 180M 0.0461 - 31.0 %37.0 200L 0.0668 180L 0.049 - 26.6 %45.0 225S/M 0.1035 200M 0.0633 - 38.8 %55.0 250S/M 0.1162 225S/M 0.1035 - 10.9 %75.0 280S/M 0.2027 225S/M 0.1035 - 48.9 %90.0 280S/M 0.2027 225S/M 0.1035 - 48.9 %

110.0 315S/M 0.2356 250S/M 0.1162 - 50.7 %132.0 315S/M 0.2356 250S/M 0.1162 - 50.7 %160.0 315S/M 0.2356 250S/M 0.1162 - 50.7 %

EUROPEAN MARKET - 3000 rpm

INDUCTION MOTOR PERMANENT MAGNET MOTOROutput (kW)

FRAMEVOLUME

(m3)FRAME

VOLUME (m3)

Volume Reductio


MOTOR EFFICIENCY - 400V - EUROPE - 3000 rpm

91.992.4

92.793.3

93.794

94.394.7

95 95.2 95.4 95.6

93.493.8

94.294.5

94.895.1

95.4 95.6 95.8 96.0 96.0 96.295.8 95.8 95.8

96.2 96.4 96.6 96.696.9 97.1 97.3 97.4 97.5

91

92

93

94

95

96

97

98

99

15 18,5 22 30 37 45 55 75 90 110 132 160

Output (kW)

Eff

icie

ncy

(%

)

IE3 IE4 WMagnet


MOTOR EFFICIENCY - 400V - EUROPE - 1500 rpm

91.4

92.192.6

9393.6

93.994.2

94.695 95.2

93.694.0

94.394.7

95.095.3

95.6 95.8 96.0 96.2

93.694

94.494.9 94.9

95.9 96 96.196.7 96.7

90

91

92

93

94

95

96

97

98

11 15 18.5 22 30 37 45 55 75 90

Output (kW)

Eff

icie

ncy

(%

)

IE3 IE4 WMagnet


Motor Three-Phase PM Motor Three-Phase Induction Motor Output (kW) 37 37 Frame 180M 200L Rated voltage (Vrms) 380 380 Poles 6 2 Rated speed (rpm) 3600 3600 Rated current (A) 63,2 71,1 Rated torque (Nm) 98,1 98,0 Efficiency at 100%load (%) 95,8 93,2 Power factor at 100%load 1,00 0,88

Insulation class F F Service factor 1,0 1,0 Duty cycle S1 S1

Enclosure IP55 (TEFC) IP55 (TEFC) Aprox. weigh (kg) 201,6 246,5

Permanent Magnet Motor X Induction Motor


Derating Curve for Induction Motor and PM Motor

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

Frequency / Rated Frequency

To

rqu

e /

Ra

ted

To

rqu

e

Induction Motor PM Motor


PM 50 kW x Induction 55kW

70

75

80

85

90

95

0 1000 2000 3000 4000 5000 6000 7000

SPEED (RPM)

EF

FIC

IEN

CY

(%

)

PM Induction

PM x INDUCTION

Number of poles: 6 x 2Frame: 180 x 225Weigh: 100kg x 410kg (+410%) Volume: 9.61cm³ x 36.1cm³(+375%)


Thank you!

Sebastião L. [email protected]

wmagnet drive system

Documents