Siemens simovert masterdrives

Engineering Information 06.2005
6SE7087-6QX70 (Version AE) Siemens AG
11-32 Compendium Motion Control SIMOVERT MASTERDRIVES
♦ The following applies to the motor current during constant travel:
I
M
k
A
Mot k
Mot k
Tn
===
100
321
134
24
.
.
.
♦ Thus:
IA
Mot max
.= 2316 < 330⋅=IA
Un
IA
Mot mean
= 34.
< IA
Un
= 10 2.
IA
Mot k
= 24.
< 091 93..⋅=IA
Un
The 6SE7021-0TP50 Compact PLUS inverter can therefore be used
when I
Un
=10.2 A.
The maximum DC link current and the mean value of the DC link
current for the inverter which occur during motor operation must be
determined for later rating of the rectifier unit. To do this, all motor
power output levels within the travel curve first have to be calculated.
♦ Max. power output of motor during acceleration
P
Mn
kW
Mot b
Mot b Mot
max
max
..
.=
⋅
=
⋅
=
9550
3103 21827
9550
709
♦ Power output of motor during constant travel
P
Mn
kW
Mot k
Mot k Mot
=
⋅
=
⋅
=
max
..
.
9550
3 21 2182 7
9550
0 734
♦ Max. power output of motor during deceleration
P
Mn
kW
Mot v
Mot v Mot
max
max
..
.=
⋅
=
−⋅
=−
9550
19 83 2182 7
9550
453
6. Determination of
the DC link
currents