Primary Uni-3 Motor Protection Logic; Faulta1 Selection Circuit; Faulta1 Source Selection Jumper - Motorola Digital DNA DSP56F807 Hardware User Manual

2.16.1 Primary UNI-3 Motor Protection Logic

The Primary UNI-3 DC Bus Over-Voltage signal is connected to the DSP's PWM group
A fault inputs. The three Primary UNI-3 Phase Over-Current signals are connected to the
DSP's PWM group A's fault inputs, i.e., FAULTA1, FAULTA2 and FAULTA3.
Figure 2-13 contains the diagram of the Over-Voltage and one phase of the Phase
Over-Current circuit for the UNI-3 interface. The FAULTA1 input can be sourced from
the Phase A Over-Current circuit or the DC Bus Over-Current circuit. Jumper JG1,
provides the selection; reference
DC BUS CURRENT SENSE
I_sense_DCB
PHASE A CURRENT SENSE
PHA_IS
Table 2-9. FAULTA1 Source Selection Jumper
2-20
Figure 2-12
+5.0V
+5.0V
+
–
+5.0V
+5.0V
+
–
Figure 2-12. FAULTA1 Selection Circuit
JG1
1–2 Phase A Over-Current Sense input
2–3 DC Bus Over-Current Sense input
DSP56F807EVM Hardware User's Manual
and Table 2-9.
+3.3V
LM393
+3.3V
LM393
Comment
JG1
3
2
FAULTA1
1