E02016 2/02
Electrical Propulsion Components
E2-1
ELECTRICAL PROPULSION COMPONENTS
GENERAL SYSTEM DESCRIPTION
The electric propulsion and control system of the
Komatsu truck consists of an engine driven alternator
and cooling air blower, control system, wheel motors,
retarding grids and blower motor. The alternator pro-
duces A.C. current which is rectified to D.C. current.
The wheel motors use D.C. current to operate as
motors in propulsion and generators in retarding.
When the operator selects FORWARD or REVERSE
propulsion, the armatures of the motors drive planetary
gear sets connected to the rear wheels to propel the
truck in FORWARD or REVERSE.
During truck operation, the operator initiates command
signals to the engine and control system. The signals
are received at the FL275 electronic card panel initiat-
ing a series of checks to determine the status of sys-
tem components. After checking the control system,
the FL275 panel energizes the necessary contactors to
set up the control system for propulsion or retarding
and send a control signal to the static exciters.
During it's operation, the FL275 panel maintains the
propulsion system within the design limits of the alter-
nator, engine, and wheel motors. Regulation of alterna-
tor field current and engine speed determine traction
motor armature current. Regulation of motor field cur-
rent determines traction motor horsepower.
The control system responds to electrical signals gen-
erated by the operator and by “feedback” signals gen-
erated by various devices within the system. These
feedback signals monitor voltage, current, speed, etc.
of the various control and propulsion equipment.
When the operator depresses the retard pedal or the
truck exceeds the automatic overspeed setting, the
dynamic retarding circuit is activated causing the wheel
motors to become generators. The truck momentum
causes the armatures of the wheel motors to rotate,
generating a D.C. output that is applied across the
retarding grids. This load opposes armature rotation to
slow the truck. The energy from the wheel motor is dis-
sipated in the retarding grids in the form of heat.
Retarding grid cooling is provided by a motor-driven
fan, blowing air across the grids. The cooling air blower
connected in-line to the rear of the alternator provides
cooling air for the static exciters, alternator and wheel
motors during truck operation.
Refer to the following information for detailed descrip-
tions of component functions.
CONTROL SYSTEM
The Statex III control system electronics provide all of
the functions necessary to initiate and regulate opera-
tion of the truck. It monitors operator input and system
feedback signals, calculates a response, and initiates
the appropriate control action.
The system . . . .
•
Establishes the propulsion circuit by energizing
contactors P1, P2 (if installed), MF, GF, and
GFR to power the wheelmotors.
•
Establishes the retarding circuit by energizing
contactors MF, GF, GFR, RP1, RP2, RP3, RP4,
RP5, (and optionally RP6, RP7, RP8 and RP9)
for extended range retarding to connect grid
resistors RG1 and RG2 in the motor circuits.
Extended range retarding is regulated automati-
cally by sequentially energizing the RP3-RP9
contactors.
•
Provides current limit control so that specific
rates may be maintained in both motoring and
retarding.
•
Provides Retard Speed Control for automatic
speed regulation on long down-hill runs.
•
Provides two-speed overspeed control which
allows a higher overspeed restriction when trav-
eling empty.
•
Provides Alternator Tertiary Winding protection
and Wheelmotor overcurrent protection.
•
Initiates the necessary operating restrictions,
including the shut down of the truck if a system
fault is detected. Lesser faults or events cause
respective indicating lights to light. All events
are recorded for future review by technicians.
•
Provides fault/event information to the operator/
technician as to the status of the system via the
2-digit display panel, located in the control cabi-
net. This panel, showing a two digit display of
00 to 99, indicates to the technician the exist-
ence of possible faults or other events which
have occurred within the control and/or propul-
sion system.
•
Provides automatic and manual diagnostic self-
test routines to detect faults and to assist main-
tenance personnel in locating a poorly operat-
ing system/subsystem.
•
Provides a statistical data history log which indi-
cates lifetime, quarterly, monthly and daily per-
formance data. This history log can be
accessed using a “laptop” computer, and can
be a valuable aid in determining equipment use
and maintenance schedules.
Summary of Contents for 830E
Page 1: ...CEBM013200 Shop Manual DUMP TRUCK SERIAL NUMBERS A30708 A30732 ...
Page 2: ......
Page 4: ...NOTES ...
Page 8: ...A 4 Introduction A00032 KOMATSU MODEL 830E TRUCK ...
Page 9: ... ...
Page 10: ... ...
Page 12: ...A2 2 Major Component Description A02063 830E MAJOR COMPONENTS ...
Page 32: ...A3 18 General Safety and Operating Instructions A03020 NOTES ...
Page 34: ...A3 20 General Safety and Operating Instructions A03020 ...
Page 46: ...A3 32 General Safety and Operating Instructions A03020 NOTES ...
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Page 80: ...0 4 5 67 5 789574 0 1 23 ...
Page 82: ...NOTES B1 2 Index B01018 ...
Page 92: ...NOTES B3 6 Dump Body B03018 ...
Page 94: ...C1 2 Index C01024 NOTES ...
Page 116: ...NOTES C5 6 Air Filtration System C05012 4 98 ...
Page 135: ...D02023 24 VDC Electric Supply System D2 17 FIGURE 2 8 CRANKING MOTOR ASSEMBLY ...
Page 181: ...E02016 2 02 Electrical Propulsion Components E2 25 ...
Page 228: ...E2 72 Electrical Propulsion Components 2 02 E02016 NOTES ...
Page 290: ...G2 8 Tires and Rims 04 03 G02004 NOTES ...
Page 304: ...G3 14 Front Wheel Hub and Spindle 04 03 G03018 NOTES ...
Page 312: ...H1 2 Index 5 03 H01015 NOTES ...
Page 324: ...H3 4 Rear Suspensions 4 03 H03015 ...
Page 331: ... 0 0 6 76 6 7 5 5 M A 5 5 0 1 23 4 0 1 5 6 7 6 4 7 G 2 6 7 3 3 H I 5 5 3 HH ...
Page 333: ...C B 654 7 H 6 27 0 L C N 6 2J 7 5 0 M 6 27 1 J 5 654 27 0 5 0 5 0 5 0 67 0 6 7 A ...
Page 370: ...J4 10 Brake Circuit Check Out Procedure J04031 NOTES ...
Page 380: ...J5 8 Rockwell Wheel Speed Front Disc Brakes J05019 NOTES ...
Page 410: ...L2 4 Hydraulic System L02027 NOTES ...
Page 426: ...L3 16 Hydraulic Component Repair 7 02 L03026 NOTES ...
Page 429: ...L04037 Steering Circuit L4 3 FIGURE 4 2 FLOW AMPLIFIER ...
Page 431: ...L04037 Steering Circuit L4 5 FIGURE 4 3 FLOW AMPLIFIER No Steer ...
Page 433: ...L04037 Steering Circuit L4 7 FIGURE 4 4 FLOW AMPLIFIER Steering Left ...
Page 435: ...L04037 Steering Circuit L4 9 FIGURE 4 5 FLOW AMPLIFIER Steering Right ...
Page 437: ...L04037 Steering Circuit L4 11 FIGURE 4 6 FLOW AMPLIFIER No Steer External Shock Load ...
Page 441: ...L04037 Steering Circuit L4 15 FIGURE 4 9 CUT AWAY VIEW OF STEERING PUMP ...
Page 444: ...L4 18 Steering Circuit L04037 NOTES ...
Page 453: ...L05026 Steering Component Repair L5 9 FIGURE 5 7 FLOW AMPLIFIER VALVE ...
Page 476: ...L5 32 Steering Component Repair L05026 NOTES ...
Page 483: ...L07027 Hoist Circuit L7 7 FIGURE 7 6 FLOAT POSITION ...
Page 485: ...L07027 Hoist Circuit L7 9 FIGURE 7 7 POWER UP ...
Page 487: ...L07027 Hoist Circuit L7 11 FIGURE 7 8 HOLD POSITION ...
Page 489: ...L07027 Hoist Circuit L7 13 FIGURE 7 9 POWER DOWN ...
Page 491: ...L07027 Hoist Circuit L7 15 FIGURE 7 10 FLOAT POSITION ...
Page 492: ...L7 16 Hoist Circuit L07027 NOTES ...
Page 504: ...L8 12 Hoist Circuit Component Repair L08031 FIGURE 8 18 HOIST CYLINDER ...
Page 512: ...L8 20 Hoist Circuit Component Repair L08031 NOTES ...
Page 523: ...L10016 05 03 Hydraulic Check out Procedure L10 11 FIGURE 10 5 FLOW AMPLIFIER VALVE ...
Page 532: ...NOTES M1 2 Index M01047 ...
Page 546: ...NOTES M5 4 Wiggins Quick Fill Fuel System M05002 10 96 ...
Page 556: ...NOTES M8 6 Special Tools M08005 7 02 ...
Page 592: ...M9 36 Air Conditioning System 05 02 M09010 for HFC 134a Refrigerant NOTES ...
Page 596: ...M19 4 Radiator Shutters M19002 NOTES ...
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Page 654: ...0 1 0 9 2 4 7 7 7 E 7 0 4 9 4J0 4 4 E7 9 J 47 4 E 4 E7 E 7 0 7 09 49 6E E 2 2 ...
Page 678: ...N2 16 Truck Cab 04 03 N02014 NOTES ...
Page 682: ...N3 4 Cab Components N03018 NOTES ...
Page 688: ...N4 6 Operator Comfort N04023 NOTES ...
Page 710: ...N5 22 Operator Controls N05056 NOTES ...
Page 712: ...P1 2 Index P01028 NOTES ...
Page 715: ...P02039 Lubrication and Service P2 3 ...
Page 726: ...P2 14 Lubrication and Service P02039 NOTES ...
Page 744: ...P3 18 Automatic Lubrication System P03022 NOTES ...
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Page 754: ...R1 2 System Schematics R01060 NOTES ...
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