4
05.01
4.2 Current de–rating
4-89
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
4.2.1 Information on the motor–drive converter selection, MSD analog
Various inverter clock frequencies can be parameterized; observe the current
de–rating.
Inverter clock frequency for MSD analog f
0
=3.2 kHz: The currents are a function
of the inverter clock frequency f
T
.
Table 4-5 Currents as a function of the inverter clock frequency
In/Is6/Imax
in A
In/Is6/Imax
in A
In/Is6/Imax
in A
In/Is6/Imax
in A
In/Is6/Imax
in A
In/Is6/Imax
in A
In/Is6/Imax
in A
In/Is6/Imax
in A
PM
type
Code
No.
f
T
3.20 kHz
f
T
4.70 kHz
f
T
6.30 kHz
f
T
7.80 kHz
f
T
2.80 kHz
f
T
3.90 kHz
f
T
5.00 kHz
f
T
5.90 kHz
LT 50A
LT 80A
LT 108A
LT 120A
LT 160A
LT 200A
LT 300A
LT 400A
6
7
13
8
9
10
11
12
24/32/32
30/40/51
45/60/76
45/60/76
60/80/102
85/110/127
120/150/193
200/250/257
20/26/26
26/34/44
39/52/65
39/52/65
51/68/86
73/95/109
101/127/163
169/211/217
15/20/20
21/28/36
32/43/54
32/43/54
41/54/69
60/78/90
81/102/131
135/169/174
10/14/14
17/23/29
26/34/43
26/34/43
31/42/53
48/63/72
62/78/101
104/130/134
24/32/32
30/40/51
45/60/76
45/60/76
60/80/102
85/110/127
120/150/193
200/250/257
22/29/29
28/37/48
42/56/71
42/56/71
56/74/95
79/103/119
111/139/179
185/232/238
19/25/25
25/33/42
37/50/63
37/50/63
49/65/83
71/91/106
98/122/157
163/203/209
16/21/21
22/30/38
34/45/57
34/45/57
43/58/73
63/82/95
86/108/139
144/180/185
up to including FW 2.xx
from FW 3.0
For special motors with a lower leakage induction, it may be necessary to pro-
vide a series reactor and/or increase the inverter clock frequency of the drive
converter. From experience, motors with low leakage induction are those which
can achieve high stator frequencies (maximum motor stator frequency
> 300 Hz)
or motors with a higher rated current (rated current > 85 A).
I
N
Rated module current at the converter pulse frequency
(standard value: f
0
3.2 kHz)
I
min
Minimum motor current
I
S6
Max. motor current for an S6 load duty cycle
I
Short
Short–time limiting current of the module used in A
rms
I
0Mot
No–load motor current in A
rms
n
FS
Speed at the start of field weakening
n
max
Max. motor speed
Dimensioning the series reactor, refer to Section 6
4 Power Modules
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