15
BASICS OF CIRCUIT OPERATION
The control circuit is energized by closing the key switch, seat switch, and moving the for-
ward or reverse lever to either position, and then depressing the accelerator closing the start switch.
This applies power to the control card turning on the PMT driver , which will close the selected
directional contactor and complete the circuits to the drive motor. (See elementary drawings.)
The control card then supplies a gate pulse to 2REC turning it on to a conducting state,
allowing current to flow from the battery through lC, lX, 2REC, motor field, motor armature, sensor,
and back to the battery. After lC charges, 2REC shuts off due to lack of holding current. The con-
trol card checks that lC is charged and unlocks the gate to lREC and 5REC.
The control card then supplies a gate pulse to lREC turning it on to a conducting state, allow-
ing current to flow from the battery through lREC, motor field, motor armature, sensor, and back to
the battery. 5REC turns on and allows current to flow T4-T3, lC, lREC, 5REC to T4-T3. This
current charges the bottom of lC positive with respect to the battery positive bus. This charging cycle
occurs in less than l millisecond (.00l sec.) and 5REC shuts off. This charge is now stored on the
capacitor until it is time to turn off lREC.
Current continues to flow in lREC until the control card fires 2REC. When 2REC conducts,
capacitor lC discharges around the circuit composed of lC, 1X, 2REC, and lREC. This discharge
current opposes the battery current through lREC so that the resultant current is zero. With reverse
voltage across lREC, lREC is turned off. Current continues to flow in the 2REC, lC, motor and
battery loop until the capacitor (card terminal l4) is fully charged negative. This charge exceeds
battery voltage by an amount which is a function of peak motor current, and 2REC turns off. Figure l
illustrates the pulsing of current from the battery.
Figure l
Figure 2
During the off time, the energy stored in the motor, by virtue of the motors inductance, will
cause current to circulate through the motor around the loop formed by 3REC. Thus, providing
MD=J
Содержание EV100 LX
Страница 3: ...3 EV100LX COMPONENT LOCATIONS ...
Страница 4: ...4 EV100LX OUTLINE DRAWING ...
Страница 5: ...5 EV100LX WITH SPEED LIMIT AND FW 9 ...
Страница 6: ...6 EV100LX WITH REGEN AND FW 9 ...
Страница 7: ...7 EV100LX DUAL MOTOR CONTROL 9 ...
Страница 8: ...8 EV100LX PUMP CONTROL 9 ...
Страница 10: ...10 EV100LX PART NUMBER IDENTIFICATION ...
Страница 60: ...6 0 ...
Страница 80: ...g GE Industrial Systems EV200LX SUPPLEMENT Page 4 of 5 REV 11 2002 Wiring Diagram ...