Komatsu 830E-AC Shop Manual page 424

Table 5: PROPULSION SYSTEM COMPONENTS DESCRIPTION
FIG.
NO.
ICP
INV1 TMC CARD
INV2 TMC CARD
KEYSW
LINK1
L1, 2
M1, 2
P11A+, 11B+, 11C+
P12A+, 12B+, 12C+
P11A-, 11B-, 11C-
P12A-, 12B-, 12C-
P21A+, 21B+, 21C+
P22A+, 22B+, 22C+
P21A-, 21B-, 21C-
P22A-, 22B-, 22C-
PS
PSC
RDA, B, C
RG1A - 5C
RP1, 2
RP1S, RP2S
RP1BR \ RP2BR
E2-40
COMPONENT
2-4 Integrated Control Panel
Inverter 1 Central Processing
Unit Card and Input/Output Card
Inverter 2 Central Processing
Unit Card and Input/Output Card
Key Switch
2-6 Link Current Sensing Module
Cabinet Lights
Motorized Wheels
2-3 IGBT Phase Modules
2-3 IGBT Phase Modules
2-3 IGBT Phase Modules
2-3 IGBT Phase Modules
2-4 Power Supply
Propulsion System Controller
2-5 Rectifier Diode Panel
Retard Grid Resistors
2-5 Retard Contactors 1and 2
2-5 Suppression Modules
2-4 Resistor
Electrical Propulsion System Components
FUNCTION
The ICP is the main controller for the AC drive system.
The ICP is composed of the PSC, TCI and inverter cards.
Generates Phase Module turn-on/turn-off commands for
the Inverter 1.
Monitors voltages and currents from various areas for
Inverter 1. Monitors Traction Motor 1 speed.
Generates Phase Module turn-on/turn-off commands for
the Inverter 2.
Monitors voltages and currents from various areas for
Inverter 2. Monitors Traction Motor 2 speed.
Connects battery voltage to CPR and control circuits
when closed. (Located on instrument panel.)
Detects amount of current flow through the DC link.
Provide interior cabinet illumination.
Each Motorized Wheel consists of a Traction Motor and a
Transmission Assembly. The 3-phase asynchronous
Traction Motors convert electrical energy into mechanical
energy. This mechanical energy is transmitted to the
wheel hub through a double reduction gear train
(Transmission).
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.
A DC to DC converter which provides regulated ± 24 VDC
outputs from the unfiltered battery supply.
Supplies power to PSC, TCI & LEMS.
The PSC is a part of the ICP, and 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.
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.
Note: Some trucks do not have RP3 installed.
Suppresses voltage spikes in coil circuit when RP
contactors are de-energized.
Provides a small load across the contactor feedbacks to
help keep the contactors clean.
10/06 E02020