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PROPULSION SYSTEM COMPONENT ABBREVIATIONS & LOCATIONS
The Table 5 lists component abbreviations that are used in schematics and system description information. Refer
to Figures 2-3 through 2-6 for the location of the components. A short description of the component's primary
function is also listed.
Table 5: PROPULSION SYSTEM COMPONENTS DESCRIPTION
FIG.
NO.
AFSE
AFSER
ALT
AMBTS
ANALOG I/O CARD
BAROP
BATFU1, 2
BATTSW
BDI
BFC
BFCR
BM1, 2
BM1I / BM2I
CCF1, 2
CCLR1, 2
CCL1, 2
CD1, 2
CF11, 22, 21, 22
CGBM1, 2
CMAF
CMT
CM1, 2
E2-38
COMPONENT
2-4
Alternator Field Static Exciter
Panel
2-4
Resistor
Alternator
2-6
Ambient Temperature Sensor
System analog input/output card
2-4
Barometric Pressure Sensor
2-4
System Fuse
Battery Disconnect Switch
2-4
Battery Blocking Diode
2-4
Battery Line Filter Capacitor
2-4
Battery Filter Resistor
Grid Blower Motors 1 and 2
2-3
Current Sensing Modules
2-3
DC Link Filter Capacitors
2-3
Capacitor Charge Resistor
Panels 1 and 2
2-4
Capacitor Charge Indicating
Lights 1 and 2
2-3
Chopper Diodes 1 and 2
2-3
DC Link Filter Capacitors
2-3
Blower Motor Capacitors
2-4
Alternator Field Current Sensing
Module
2-4
Alternator Tertiary Current
Sensing Module
2-3
Chopper IGBT Phase Module 1
and 2
Electrical Propulsion System Components
FUNCTION
Regulates current in the alternator field based on firing
pulses from the PSC.
AFSE Battery boost command pull up resistor.
Main alternator, propulsion and control system.
Provides ambient air temperature input to the control
group.
Provides signal conditioning for analog signals to and
from the TCI and PSC.
Provides altitude input for control electronics.
Provides overload protection for control equipment.
Connects and disconnects the 24 VDC truck batteries.
Works in conjunction with BFC and BLFP to maintain
battery voltage to CPU.
Additional capacitance for BLFP to prevent nuisance CPU
resets.
Added to replace Battery line filter that was removed.
DC motors driving blowers to provide cooling air for the
retarding grids.
Monitors current flowing through grid blower motors #1
and #2.
Absorbs and releases current to the DC link for the grid
resistors when a current spike occurs.
Connected across the DC link to provide a voltage
attenuated sample of the DC link voltage to the Capacitor
Charge Indicating lights.
Illuminated when 50 volts or more is present on the DC
link (the DC bus connecting the Alternator output,
Chopper Module/Resistor Grid circuits and traction
Inverters).
Controls the DC voltage applied to the grids during
retarding.
Absorbs and releases current to the DC link for the
Traction Motors when a current spike occurs.
Limit the rate of current increase when starting to optimize
motor commutation.
Detects amount of current flowing through the Alternator
field winding.
Detects amount of current flowing through the Alternator
tertiary winding.
Controls the DC voltage applied to the grids during
retarding.
10/06 E02020
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