Secondary Uni-3 Motor Protection Logic; Dc-Bus Over-Voltage And Phase Over-Current Detection Circuits - Motorola 56F805 Hardware User Manual

2.16.2 Secondary UNI-3 Motor Protection Logic

The Secondary UNI-3 interface is similar to the Primary UNI-3 interface. The Secondary
UNI-3 Over-Voltage signal is connected to the controller's PWM group B's fault input,
device's FAULTB0. The three Secondary UNI-3 Phase Over-Current signals are
connected to the controller's PWM group B fault inputs, i.e., FAULTB1, FAULTB2 and
FAULTB3. The Secondary UNI-3 interface is similar to the circuits contained in
Figure 2-13. The FAULTB1 input can be sourced from the Phase A Over-Current circuit
or the DC Bus Over-Current circuit. Jumper JG16 provides the selection; reference
and
Figure 2-14 Table
DC BUS VOLTAGE SENSE
V_sense_DCB
EXAMPLE DC PHASE CURRENT SENSE
PHB_IS
Figure 2-13. DC-Bus Over-Voltage and Phase Over-Current Detection Circuits
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FAULT0
FAULT2
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