Siemens SINUMERIK 840C - Manual (Page 437)

7 Drive Machine Data (SIMODRIVE Drive MD) 12.93
7.1.2 MSD MD (data description - SW 3)
Gain factor X
h
-characteristic motor 1 175
Default value Lower input limit Upper input limit Units
Depends on motor 100 300 %
Active on
Power On
Input of gain factor (X
h2
/X
h1
) of the X
h
characteristic (magnetizing reactance) as specified on
the motor data sheet (non-Siemens motor) or automatic parameterization using machine data
"Motor code number" (MD 96).
In the field-weakening range, the magnetizing reactance X
n
increases linearly from the
saturated value at the speed at which field weakening begins to the unsaturated value at the
upper limit speed of the X
h
characteristic (see diagram MD 175).
Rated value X
h1
n
n
X
h2
X
h
100 %
MD 173/MD 233 MD 172/MD 232
MD 175/MD 235
MD 173/MD 233
Note:
If the value is unknown, then 100 % should be entered in order to obtain constant magnetizing
reactance over the entire speed range.
Breakdown torque reduction factor motor 1 176
Default value Lower input limit Upper input limit Units
100 1 150 %
Active
at once
Input of breakdown torque reduction factor as specified on the motor data sheet. The point at
which the breakdown torque limit is applied can be altered in this machine data.
Settings of higher than 100 % increase the point at which the limit is applied and vice versa
with settings of lower than 100 %.
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SINUMERIK 840C (IA)