Baumuller b maXX BM2500, Operating Manual

Page: 526 / 822

Controllers
Parameter manual b maXX BM3000
Document no.: 5.12001.07 Baumüller Nürnberg GmbH
526
of 820
4.7
4.7.7.6 Adaption of the Saturation
Asynchronous motors
During the operation of the asynchronous motors with the encoder the current model is
used. This motor generates the flux actual value from the field current with the rotor time
constant and the main inductance (Lh). To consider the non-linearity of the main induc-
tance in the field weakening a Lh characteristic is used.
Figure 175: Flux actual value with encoder, current model with Lh characteristic
with
Flux act Actual value of the magnetic Flux in %
Z
146.14
–
Tr Rotor time constant, in s
Lh act Magnetizing inductance, actual value, in H
Flux nom Magnetic flux nominal value in Vs
Id act Field current actual value in A
Im act Magnetizing current actual value in A
The Lh characteristic can be entered manually. It can be detected in the idle state (see
chapter
Z
Lh-characteristic
–
on page 149) as well.
The adaption of the flux actual value applies to the following:
m
Standardization constant (1/Ks) of the speed controller output and the torque current
set value
m
Torque monitoring ("Max. torque actual value"
Z
138.20
–
, "Torque display"
Z
138.21
–
and "Torque limit symmetric "
Z
138.22
–
)
m
Slip specification (ASM with encoder, refer to
Z
Temperature adaption slip
frequency
–
on page 527)
m
EMF feed forward
Synchronous motors
The synchronous motors operate in the linear range of the torque current characteristic
until standstill current lo (or in the linear range of the Lq inductance i.e. Lq = constant).
5000_0348_rev01.cdr
100
Tr
Id act
Lh act
Im act
Flux nom
Flux act
Lh char.