Asynchronous motor
6.2.2.1 Nameplate data
Rated torque (calculated from nameplate data)
Mass moment of inertia of the motor
For an asynchronous motor typically not the rated torque but the rated power is
specified.
The rated torque can be determined from the power and rated speed according to
the following formula:
Formula 2: Calculation rated torque
If the motor inertia can be taken from the data sheet, this value should be entered
in dr32.
If the motor inertia is unknown, cs17 can be set to 0 and instead the total inertia of
the motor plus all rigidly coupled inertia can be entered in parameter dr32 (=> also
6.3.6 Determination of the mass moment of inertia).
➢ If cs99 optimisation factor is not set to 19 "off“, the total inertia torque
shall not be 0, otherwise the error drive data is triggered when
operating dr99.
➢ If the total inertia of the motor is entered in cs17 instead of dr32 and
dr32 is set to zero, this can cause problems during parameter saving.
cs17 is set to zero in the default state. If the value dr32 (which is writ-
ten before cs17) is now set to zero by parameter backup, there are
many error messages.
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