Computer Drive Installation Instructions

7 Drive Machine Data (SIMODRIVE Drive MD) 08.96
7.3.2 Drive MD (data description)
Upper speed L
h
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 L
h
characteristic (magnetizing inductivity L
h
) 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 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 L
h
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 L
h
-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 (L
h2
/L
h1
) of the L
h
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 L
h
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 L
h
characteristic.
Graphic representation:
n
MD 1142
Rated value L
h1
n
L
h2
L
h
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)