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11 Drive Dimensioning

11.2 Motor selection

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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23

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11.2.5 M-n characteristic

The M-n characteristic indicates the torque to be reached with the selected inverter an the thermal

state of the motor.

[11-2] M-n characteristic of the motor

Description

 Limit characteristic

• For most motor-inverter combinations characteristic curves are stored in the DSD.

• If no limit characteristic curve is saved, an equivalent characteristic is shown. It is represented as a red

dotted line ( ).

 Maximum operating point

 Continuous rated curve

• Limit characteristic curve for the torque which the motor can provide continuously (S1 operation) with-

out overheating.

 Rated point of the motor

 Torque-speed characteristic of the application requirement

• For checking the motor-inverter combination the characteristic always has to be below the characteristic

curve.

 Rated motor speed

 Performance features

• The performance features can also be found in the selection table. Selection table

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