Information On The Motor-Drive Converter Selection, Im Analog - Siemens SIMODRIVE 611 Planning Manual

4 Power Modules
4.2 Current de–rating
4.2.2
4
Table 4-6
PM Code
type No.
LT 8A 1
LT 15A 2
LT 25A 3
LT 50A 6
LT 80A 7
LT 108A 13
LT 120A 8
LT 160A 9
LT 200A 10
LT 300A 11
LT 400A 12
4-90
Information on the motor–drive converter selection, IM analog
The converter must be selected according to the required duty cycle.
Further, the following restrictive conditions must be observed:
S
The motor no–load current must be less than the rated current of the drive
converter module (IM according to Table 4-6).
S
As result of the current actual value resolution, the lowest no–load motor
current must fulfill the following condition:
n
FS
n
max
Various inverter clock frequencies can be parameterized; observe the current
de–rating.
Inverter clock frequency IM analog f
In/Is6/Imax In/Is6/Imax
in A in A
f f
T T
3.20 kHz 4.70 kHz
3/3/3 2.5/2.5/2.5
5/5/8 4.2/4.2/6.8
8/10/16 6.9/8.6/13.8
24/32/32 20/26/26
30/40/51 26/34/44
45/60/76 39/52/65
45/60/76 39/52/65
60/80/102 51/68/86
85/110/127 73/95/109
120/150/193 101/127/163
200/250/257 169/211/217
up to including FW 2.xx
I Rated module current at the converter pulse frequency
N
(standard value: f
I Minimum motor current
min
I Max. motor current for an S6 load duty cycle
S6
I Short–time limiting current of the module used in A
Short
I No–load motor current in A
0Mot
n Speed at the start of field weakening
FS
n Maximum motor speed
max
S
For motors with a low leakage induction, it may be necessary to provide a
series reactor and/or increase the inverter clock frequency of the drive con-
verter. 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
w
I I (I
0Mot min min
=3.2 kHz: Currents as a function of the inverter clock frequency f
0
In/Is6/Imax In/Is6/Imax In/Is6/Imax
in A in A
f f
T T
6.30 kHz 7.80 kHz 2.80 kHz
2.0/2.0/2.0 1.6/1.6/1.6
3.4/3.4/5.4 2.6/2.6/4.2
5.7/7.1/11.4 4.6/5.7/9.1 8/10/16
15/20/20 10/14/14 24/32/32
21/28/36 17/23/29 30/40/51
32/43/54 26/34/43 45/60/76
32/43/54 26/34/43 45/60/76
41/54/69 31/42/53 60/80/102
60/78/90 48/63/72 85/110/127
81/102/131 62/78/101 120/150/193
135/169/174 104/130/134 200/250/257
from FW 3.0
3.2 kHz)
0
rms
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
according to Table 4-6)
In/Is6/Imax In/Is6/Imax
in A in A in A
f f f
T T T
3.90 kHz 5.00 kHz
3/3/3 2.8/2.8/2.8 2.4/2.4/2.4
5/5/8 4.6/4.6/7.4 4.1/4.1/6.5
7.4/9.3/15.0 6.7/8.3/13.3
22/29/29 19/25/25
28/37/48 25/33/42
42/56/71 37/50/63
42/56/71 37/50/63
56/74/95 49/65/83
79/103/119 71/91/106
111/139/179 98/122/157
185/232/238 163/203/209
rms
85 A).
>
 Siemens AG 2001 All rights reserved
05.01
T
In/Is6/Imax Imin
in A in A
f
T
5.90 kHz
2.2/2.2/2.2 0.6
3.6/3.6/5.8 1.1
6.0/7.5/12.0 1.8
16/21/21 3.6
22/30/38 5.7
34/45/57 8.5
34/45/57 11.3
43/58/73 11.3
63/82/95 14.1
86/108/139 21.2
144/180/185 28.3
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