7 Drive Machine Data (SIMODRIVE Drive MD) 12.93
7.2.2 FDD MD (data description - SW 3)
Derating (reduction) characteristics can be incorporated via this machine data, e.g. derating as
a function of the pulse frequency (MD 1100).
fPBM in kHz
111,25
100
55
3,2 82
%
MD 1105 ,
MD 1191 = MD 1107
8 x 2 x MD1118
l
limit
power section
(MD 1108) = min 8000 - f
PBM
(MD 1100)
100%; 55% + 45% x ––––––––––––––––
8000 - 3200
I
limit transistor
(MD 1107)
––––––––––––––––––
x 2
I
red. max. motor
(MD 1105) = min I
motor
I
limit power section
(MD 1108)
100%; ––––––––––––––––x 100% –––––––––––––––––––x 100%
I
max. motor
(MD 1104) I
max. motor
(MD 1104)
Imotor = Machining-specific input by user
Example:
Ilimit transistor (MD 1107) = 25 A
Pulse frequency (MD 1100) = 4000 Hz
I
limit power section
(MD 1108) = min 8000 - 4000
100%; 55% + 45% x
––––––––––
8000 - 3200 25
A
––––
x 2
I
limit power section
(MD 1108)= min (100%; 92.5%) x 17.678 A
I
limit power section
(MD 1108)= 92.5% x 17.678 A = 16.35 A
Imax. motor (MD 1104) = 20 A
Imotor = 15 A
Ired. max. motor (MD 1105) = min 15 16.35
A
100%;
––––
x 100%;
––––––
x 100%;
20 A 20 A
Ired. max. motor (MD 1105)= min (100%; 75%; 81.75%)
Ired. max. motor (MD 1105)= 75 %
7–52 © Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)