Baumuller b maXX BM3400 Series - Electrical Data for b maXX BM3400; Controller Board Electrical Data; Resolver Interface Specifications

T D App endix D - Tehnial data
D.6 Eletrial data - b maXX ® BM3400
D.6.1 Controller b oard
The controller PCB contains all modules for digital and analog in- and outputs, encoder sensing and commu-
nication. In the following sections you will find details according the modules.
D.6.1.1 Resolver interfae
Excitation voltage max. 10V
pp
Excitation frequency 4kHz
Load max. 160mA
Input level max. 1.8V
pp
Cable termination 120Ω
By reason of different transmitting conditions when using resolvers of different manufacturers a software-
controlled adaption of the excitation voltage for the optimization of the input level takes place.
The theoretic ascertainable maximum speed results of the max. permissible ratio of excitation frequency
towards useful signal frequency, which is specified with 20. Out of this the theoretical maximum permissible
speed will be
theoretical maximum speed [RPM] = n
max,t heoret ic
= f
exc it ati on
* 60 / (20 * pole number resolver).
Consequently there is for a 1-pole resolver at 4kHz excitation frequency a functional maximum speed of 12000
RPM.
The ratio between the number of pole pairs of the motor and the number of pole pairs of the resolver must be
integer. For example the combination of a motor with 3 pole pairs and a 1-pole resolver is permitted, whereas
at the same motor a 2-pole resolver ca nnot be used.
174 Instrution Manual b maXX ® BM3400
from 206 Doument No.: 5.07013.03 Baumueller Kamenz GmbH