Commissioning
5–29
1070 066 028-101 (01.05) GB
5.3
Multiple-motor drive
Several asynchronous motors with the same rated frequency and identical
rated voltages can be operated simultaneously at one inverter. The motor
power may be different.
Please note:
D
The total motor power connected must not exceed the maximum output
power of the inverter.
D
Higher acceleration and braking times are to be expected.
D
It is possible to start additional motors during operation.
If the module peak current is thereby exceeded, the messages limit
current (
I
limit
), overcurrent (F22) or driver fault (F20) may be signaled.
Adjustments
The following settings must be checked:
D
I
x R compensation
P09, P10
Overexcitation or underexcitation of the motors during operation should
be avoided.
D
acceleration and braking times
P11, P48, P49, P12
D
direct current brake
P21 – P24
A test should be carried out whether DC braking makes sense with the
multiple-motor drive connected.
Restictions
The following inverter functions cannot be used with multiple-motor drives:
D
type of characteristic with torque boost
P08
D
slip compensation
P32
D
stalling warning
P33
D
bimetal function
P43
.
These functions must remain disabled.