Nord Drivesystems SK 180E Series, User Manual

Page: 195 / 212

8 Additional information
BU 0180 en-4118 195
8.8 Motor data - characteristic curves
The possible characteristic curves with which the motors can be operated are explained in the
following. The rating plate data of the motor is relevant for operation with the 50 Hz or 87 Hz
characteristic curve (

Section 4 "Commissioning"). The use of specially calculated motor data is
required for operation with a 100 Hz characteristic curve (

Section 8.8.3 "100 Hz characteristic
curve (only 400 V devices)").
8.8.1 50 Hz characteristic curve
(

Variation 1:10)
The motor used for 50 Hz operation can be
operated up to its rated point at 50 Hz with
nominal torque. Operation above 50 Hz is
possible, however the output torque reduces
in a non-linear manner (see following
diagram). Above the rated point, the motor
enters its field weakening range, since the
voltage cannot be increased beyond the
value of the mains voltage when the
frequency is increased above 50 Hz.
50 Hz characteristic curve (4-pole motor)
0
0,2
0,4
0,6
0,8
1
1,2
0 10 20 30 40 50 60 70 80 90 100
Frequenz / Hz
Drehzahl / 1/min
M/Mn
M/M
N
P/P
N
0 1445 2890
Frequency
[Hz]
Speed
[1/min]
Figure 21: 50 Hz characteristic curve
115 V / 230 V – frequency inverter
With 115 V devices, the input voltage is doubled is doubled inside the device so that the required
maximum output voltage of 230 V is achieved by the device.
The following data refers to a 230/400V motor winding. They apply for IE1 and IE2 motors. It should
be noted that these details may deviate slightly, as motors are subject to certain manufacturing
tolerances. It is recommended that the resistance of the connected motor is measured by the
frequency inverter (P208 / P220).
Motor
(IE1)
SK …
Frequency
inverter
SK 1xxE-…
M
N
**
[Nm]
Parameterisation data of frequency inverter
F
N
[Hz]
n
N
[rpm]
I
N
[A]
U
N
[V]
P
N
[kW]
cos ϕ
Y/Δ
R
St
[ Ω ]
71S/4 250-323-A* 1.73 50 1365 1.3 230 0.25 0.79 Δ 39.9
71L/4 370-323-A* 2.56 50 1380 1.89 230 0.37 0.71 Δ 22.85
80S/4 550-323-A* 3.82 50 1385 2.62 230 0.55 0.75 Δ 15.79
80L/4 750-323-A* 5.21 50 1395 3.52 230 0.75 0.75 Δ 10.49
90S/4 111-x23-A 7.53 50 1410 4.78 230 1.1 0.76 Δ 6.41
90L/4 151-323-A 10.3 50 1390 6.11 230 1.5 0.78 Δ 3.99
* the same data apply for the use of the 115 V version of the SK 1xxE
** at rated point