Performance Motion Devices Magellan DK58113, User Manual

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Operation
32
DK58113 Developer Kit User Manual
2
2.5 DC Bus
Figure 2-6:
DC Bus
Monitoring
Circuitry
Figure 2-6 shows the DC bus monitoring circuitry used with the DK58113 board. This circuitry is designed to work
with the MC58113’s DC bus management and protection logic. These functions include overcurrent protection, over
and under voltage detection, ground fault detection, and shunt resistor control.
2.5.1 DC Bus Current Monitoring
DK58113 monitors both the positive and negative DC bus current to detect overcurrent conditions including: line-
to-line, line-to-power supply, and line-to-ground short circuits.
2.5.1.1 DC Bus Current Monitoring Scale Values
The following DC bus current monitoring scale values for the DK58113 board are required to correctly operate the
DC bus current monitoring functions:
Parameter Value & Units Comments
Bus current supply
conversion .505 mA/count This value should be entered so that the DC bus current
supply can be traced and displayed correctly in amps.
Leg current return
conversion .733 mA/count This value should be entered so that the DC bus current
return can be traced and displayed correctly in amps.
+HV
GND
MC58113 0
Shunt
Pre-
driver
Analog
Signal
Conditioning
BusVoltage
+HV
Analog
Signal
Conditioning
BusCurrentSupply
Current1A-1D
Switching
Motor
Bridge
Shunt
Power Resistor & Diode
via J14
Analog
Signal
Conditioning
GND
Leg Current
Sensors