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TABLE V: PROPULSION SYSTEM COMPONENTS DESCRIPTION (Cont.)
REF.
NO.
PSC
32
PM1A+, 1B+, 1C+
13
PM1A-, 1B-, 1C-
12
PM2A+, 2B+, 2C+
15
PM2A-, 2B-, 2C-
14
RD
2
RG1A, 1B, 1C, 2A,
2B, 2C, 3A, 3B,
64
3C, 4A, 4B, 4C,
5A, 5B, 5C
RP1, 2, 3
47
RP1S, 2S, 3S
55
RSN1, 2
RS1A, 1B, 1C, 2A,
2B, 2C
R1
51
AUX SNUB
25
SPS
37
SS1, 2
SYS CPU Card
E02014 3/01
COMPONENT
Propulsion System Controller
(17FL320)
GTO Phase Modules (17FM628)
GTO Phase Modules (17FM629)
GTO Phase Modules (17FM628)
GTO Phase Modules (17FM629)
Rectifier Diode Panel (17FM528)
Retard Grid Resistors
Retard Contactors 1, 2 and 3
(17CM55)
Suppression Modules
Snubber Resistors
Snubber Resistors
Battery Boost Resistor
Snubber
Power Supply (17FH36)
Traction Motor Speed Sensors
System Central Processing Unit
Card (17FB147)
Electrical Propulsion System Components
FUNCTION
The PSC is the main controller for the AC drive system.
All propulsion and retarding functions are controlled by
the PSC based on internally stored software instructions.
Provide positive driving voltages (PWM or square wave,
depending on truck speed) for each of the three windings
of Traction Motor 1.
Provide negative driving voltages (PWM or square wave,
depending on truck speed) for each of the three windings
of Traction Motor 1.
Provide positive driving voltages (PWM or square wave,
depending on truck speed) for each of the three windings
of Traction Motor 2.
Provide negative driving voltages (PWM or square wave,
depending on truck speed) for each of the three windings
of Traction Motor 2.
Converts Alternator 3-phase, AC voltage to DC voltage to
power the two Inverters.
Dissipate power from the DC link during retarding, load
box testing, and Inverter Filter Capacitor discharge
operations.
When closed, connects Grid Resistors to the DC link
during retarding, load box testing, and Inverter Filter
discharge operations.
Suppresses voltage spikes in coil circuit when RP
contactors are de-energized.
Provide a current path for the associated Chopper
Module filter capacitors.
Provide a current path for the associated Phase Module
filter capacitors.
Limits surge current in the Alternator field circuit when
GFR contacts first close.
Suppresses voltage spikes in Aux Blower Motor circuit.
A DC to DC converter which provides regulated ±24 VDC
outputs from the unfiltered battery supply.
Each speed sensor provides two output speed signals,
proportional to the Traction Motor's rotor shaft speed.
Provides control of propulsion and dynamic retarding
functions, battery backed RAM, real-time clock,
downloadable code storage, and an RS422 serial link.
E2-45
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