8 Additional information
BU 0200 en-3118 267
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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 4.1 "Factory settings"). 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)").
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8.8.1 50 Hz characteristic curve
(ïƒ 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
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
Frequency
[Hz]
Speed
[1/min]
Figure 38: 50 Hz characteristic curve
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