Lenze 8400 - Manual (Page 243)

Commissioning
Before switching on
7

243 EDS84ASC552 EN 9.1
Notes for motor operation

Danger!
ƒ For thermal reasons, continuous operation of self-ventilated motors at low
field frequency and rated motor current is not permissible. If required,
activate a motor temperature monitoring with C00585
– motor temperature monitoring with I 2 xt (see software manual)
– motor temperature monitoring with motor PTC (see software manual).
ƒ Select 87-Hz operation under code C00015 if an asynchronous motor in
delta connection (nameplate data: 400 V/230 V) is to be operated on a
frequency inverter for a supply voltage of 400 V.

Tip!
In the Lenze setting, the ”linear V/f characteristic” operating mode is set as
motor control. The parameter settings are preset so that if the frequency
inverter and the 50 Hz asynchronous machine match in terms of power, the
controller is ready for operation without any further need for parameterisation
and the motor operates satisfactorily.
Recommendations for the following application cases
ƒ If the frequency inverter and the motor differ strongly in terms of
power
– Set code C00022 (I
max
limit in motor mode) to 2.0 I
N(motor)
.
ƒ If a high starting torque is required
– When the motor is idling, set the code C00016 (V
min
boost) so that a
rated motor current flows with a field frequency f = 3 Hz (C00058).
ƒ For noise reduction
– Set code C00018 to the value ”3” (switching frequency 16 kHz
sin var
).
ƒ If a high torque without feedback is to be available at low speeds, we
recommend the ”vector control” mode.