Siemens CBP Manual Del Usuario página 110

06.2005
U Exciter signal
Adjustment
Siemens AG 6SE7087-6NX84-0FF5
SIMOVERT MASTERDRIVES
SBR1/2 – Sensor Board Resolver (only for MASTERDRIVES Motion Control)
U Sine track
t
U Cosine track
Fig. 8-3 Resolver output signals
Via a PLL control loop, the SBR optional board is capable of setting the
phase position of the exciter signal such that the sine or cosine signal
induced in the stator windings of the resolver is always sensed at
maximum.
At the same time, the amplitude of the exciter signal is adjusted to the
maximum resolution of the internal A/D transformer. This enables the
position angle of the stator winding to be sensed with the maximum
possible accuracy.
Option boards
track
U
α = arctan
U
t
Sine track
Cosine track
t
8-3