ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS
Page
41
March 2002
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Section 6.4
Setup Functions for Traction Controller
FUNCTION 1
1A Pick Up Select
(Push
1)
This function allows for selecting the method that the 1A
contactor is energized. The 1A contactor pick up can be set
to pick up on reaching 100% on time only or for pick up
below 100% on time, including a motor stall condition.
Setting
1A Pick Up Condition
1 - 128
Pick at 100% on Time Only
129 – 255
Pick below 100% on Time Including Stall
FUNCTION 2
CREEP SPEED
( Push 2 )
This function allows for the adjustment of the creep speed of
the vehicle. Creep speed can be adjusted when an
accelerator input voltage between 3.9 and 3.3 volts or an
accelerator ohm input between 6K and 4.0K ohms is
provided.
Range
2% to 15% on time
Set
0 to 255
Resolution
0.05% per set unit
Example:
Setting of 20 = 3% on time
Important Note: This function is used to optimize motor and control
performance and this setting will be determined by GE and OEM engineers
at the time of vehicle development. This setting must not be changed by
field personnel without the permission of the OEM.
FUNCTION 3
ARMATURE CONTROLLED
ACCELERATION AND 1A TIME
(Push
3)
This function allows for the adjustment of the rate of time it
takes for the control to accelerate to 100% applied battery
voltage to the motor on hard acceleration. The 1A
contactor will automatically close 2.0 seconds after the
controlled acceleration stops and the accelerator input is
less than 0.5 volts or less than 200 ohms.
Range
0.1 to 22.0 seconds
Set
0 to 255
Resolution
0.084 seconds per set unit
Example:
Setting of 20 = 1.8 seconds C/A and 2.0
seconds 1A time
FUNCTION 4
ARMATURE CURRENT LIMIT
(Push
4)
This function allows for the adjustment of the armature
current limit of the control. The rating of the control will
determine the range of adjustment for this function. Please
refer to the specification sheets and current limit curves for
the control used in your vehicle.
Range
See control C/L curves
Set
0 to 255
Example:
0 = min. current, 255 = max. current
FUNCTION 5
REGEN RAMP RATE
(Push
5)
This function allows for the adjustment of the rate that regen
braking is applied .
Armature current adjustment setting range: 0 to 126
Higher values of this setting correspond to a faster rate of
change in armature current.
Field current adjustment setting range: 0 to 126
0 - 42
Fastest rate of change in field current
43 - 84 Medium rate of change in field current
85 - 126 Slowest rate of change in field current
FUNCTION 6
ERROR COMPENSATION( Field Gain)
( Push 6 )
This function is used to reduce the ripple in field current due
to the interaction between motor field design and the digital
field current regulation circuit. The value for this function
should be set to 11.