910 HEIDENHAIN Technical Manual iTNC 530 HSCI
If the stall current value is given in the motor table, the following model of
current (with respect to the stall current) is used to calculate the temperature
in the motor. This is only used for synchronous motors, however. For
asynchronous motors, the entry I-0 ia not the (thermal) continuous stall current
but the magnetizing current, because it is not necessary to distinguish
between continuous stall current and rated current on asynchronous motors.
This differentiation is not necessary for asynchronous motors because with
them, a slip frequency always occurs under load.
For synchronous motors, the factors from MP2302.x and MP2304.x are not
yet taken into account in the following description.
Stall current
I-0
Rated current I-N
n
Rated rotational
speed N-N
Reference value for I
2
T monitoring
F-AC
F-DC
I-0 * 0.707
Limit frequency through interpolation for the
CC 6xxx
n
Reference value for I
2
T monitoring
Stall current
I-0
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