7 Drive Machine Data (SIMODRIVE Drive MD) 08.96
7.3.2 Drive MD (data description)
Upper speed Lh characteristic motor 1
1143
Default value Lower input limit Upper input limit Units
0.0 0.0 50 000.0 rev/min
Active on
Power On
Input of upper speed limit for the Lh characteristic (magnetizing inductivity Lh) as specified on
the motor data sheet (non-Siemens motor) or automatic parameterization using machine data
"Motor code number" (MD 1102). In the field-weakening range, the magnetizing reactance Xn
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 Lh characteristic (see diagram MD 1144).
Notes:
• This machine data only applies to main spindle drives.
• As from SW 5, this machine data is no longer used.
Gain factor Lh-characteristic
1144
Default value Lower input limit Upper input limit Units
0.0 100.0 500.0 %
Active on
Power On
Input of gain factor (Lh2/Lh1) of the Lh characteristic (magnetizing reactance) as specified on
the motor data sheet (non-Siemens motor) or automatic parameterization using machine data
"Motor code number" (MD 1102). In the field-weakening range, the magnetizing inductivity Lh
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 Lh characteristic.
Graphic representation:
n
MD 1142
Rated value Lh1
n
Lh2
Lh
100 %
MD 1142 MD 1143
MD 1144
Notes:
• If the value is unknown, then 100 % should be entered in order to obtain constant
magnetizing reactance over the entire speed range.
• This data is relevant only for MSD drives.
• As from SW 5, this machine data is no longer used.
7–96 © Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)