Lust CDA3000 - Standard Inverter Operation

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Engineering Guide CDA3000
3 Selection of inverter module
3.3.3 Standard
inverter
operation
Initial commissioning automatically optimizes the control circuits such
that, with inverter output assigned equal to motor output, the typical
power output and torque characteristic shown in Figure 3.31 is produced.
Typical torque characteristic of a standard three-phase AC motor
in standard inverter operation P
Inverter
= P
Motor
Figure 3.31 Typical torque characteristic of a standard three-phase AC
motor
(1) Delivered power output of a standard three-phase AC motor in standard
inverter operation
(2) Permissible torque characteristic of an internally cooled standard three-
phase AC motor in standard inverter operation
(2.1) Typical characteristic at motor power output <4 kW
(2.2) Typical characteristic at motor power outputs >15 kW
Note: Precise data can only be given by the manufacturers of the
motors.
(3) Permissible torque characteristic of an adequately externally cooled
standard three-phase AC motor with standard inverter. It should, how-
ever, be noted that at motor power outputs >15 kW a rotor fan is very
often used, meaning that the characteristic (3) may need to be reduced.
Note: Note: Precise data can only be given by the manufacturers of
the motors.
120
0.1
1.0
0.5
1005010
1.5
M
M
N
f [ Hz]
P >
(2)
(2)
(2)
(1)
(3)
(4)
2.0
1.8
(5)
(2.1)
(2.2)
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