6motor interface – Lenze E94AxPExxxx User Manual
Page 255
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
255
6
Motor interface
6.8
Parameterisable additional functions
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
• When field weakening is switched on, the actually used maximum effective motor magnetising
current is shown in
, if field weakening is switched off, "0 A" are displayed, as before.
Note!
If a Lenze motor is used:
The controller is parameterised automatically so that the field weakening works
optimally and there is no danger to the devices.
Stop!
If an OEM motor is used:
If pulse inhibit is set in the controller, the DC bus is loaded with the voltage that
corresponds to the current speed of the machine.
Since with switched-on field weakening higher speeds can be achieved at a
correspondingly higher rotor voltage of the motor, the DC bus can be loaded to a voltage
higher than the set DC-bus voltage in case of pulse inhibit and a currently high motor
speed and even exceed the maximally permissible voltage of 800 V!
In order to protect the device, either use a brake chopper, or parameterise the speed
monitoring via
and
, so that only a maximum motor speed is possible
that could also be reached with Vdc-bus = 800 V without field weakening.