Baumuller b maXX BM5800 - Page 132

Configuration
Parameter manual b maXX BM5800
Document No.: 5.16029.03 Baumüller Nürnberg GmbH
132
of 814
3.4
Figure 46: ProDrive Breakdown torque controller at IPMSM
MTPF characteristic
The MTPF characteristic shows the maximum field current which can be impressed at a
specific flux reserve to reach the maximum torque. The x-axis indicates the flux in Vs and
the y-axis indicates the current in A. The MTPF characteristic is standardized in depen
-
dence of the nominal voltage and the nominal speed as it is assumed that the motors can
be operated without limiting the ld current. Thus, the flux reserve is divided in 15 equal
steps up to 0 by the nominal flux. The characteristic can be calculated automatically in the
controller by bit
12 of Z171.1–.The MTPF should be calculated again if the maximum cur-
rent (Z19.6–) or the maximum field current (Z146.12–) are changed.