ETAS ES5340.2, User Manual

Page: 34 / 120

ES5340.2 Electric Drive Simulation Board -User’s Guide 34
Hardware Description ETAS
The excitation signal is connected instead of an external reference (see Fig. 3-3
and "Assignment of the connectors for the inputs" on page 100).
Fig. 3-3 Schematic circuit diagram of an analog output configured as
"resolver"
Sine Encoder
If a sine encoder (Vogt sensor) is used as the speed sensor, any two analog chan-
nels can be used for the A and B signals (see Fig. 3-4).
Fig. 3-4 Signals A and B of the sine encoder
Note
When using a resolver as position sensor, AGND of channel 6 (pin 43 and 44 of
the DSUB62HD connector) has to be connected with AGND of
channel 7 (pin 45 and 46 of the DSUB62HD connector)!
Without this connection the ES5340.2 cannot detect the excitation signal!
REF
IN
Out = IN x REF
OUT
FPGA
Excitation
Galv. Iso.
Sin
10 V Ref
Galv. Iso.
DAC
ECU
ADC
Excitation Signal
Generation
REF
IN
OUT = IN x REF
OUT
Internal
Reference
Galv. Iso.
10 V Ref
Galv. Iso.
DAC
ECU
ADC Cos
+
-
A
B
2.5 V
1 V
t
t