ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS
Page
30
This function allows the adjustment of the field weakening
level in order to set the top speed of the motor.
This
function is used only when Mode 0 is selected.
Set
51 to 195
Resolution
0.15 amps per set unit
Example
Setting of 180 = (180-51) x 0.15
= 19.35 amps
Range
0 to 20 amps
CAUTION:
Do not set this function to a value less than 51.
Set
51 to 195
Resolution
0.15 amps per set unit
Example
Setting of 73 = (73-51) x 0.15
Important Note: The 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.
= 3.3 amps
CAUTION:
Do not set this function to a value less than 51.
Important Note: The 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 11
NOT APPLICABLE
This function is not applicable to this control type.
FUNCTION 12
REVERSE SPEED LIMIT
FUNCTION 8
MAX FIELD CURRENT
This function allows for the adjustment of the top speed of
the vehicle (maximum battery volts to the motor) when it is
being operated in the reverse direction.
This function allows for the adjustment of the maximum
field current in order to obtain the maximum torque of the
motor.
Range
100% to 0% of battery volts
Range
0 to 20 amps
Set
0 to 255
Set
51 to 195
Resolution
0.392% per set unit
Resolution
0.15 amps per set unit
Example:
Setting of 0 = no speed limit
Example
Setting of 170=(170–51) x 0.15
Setting of 255 = maximum speed
= 17.85 amps
reduction
Setting of 100 = 100 x .392
CAUTION:
Do not set this function to a value less than 51.
= 32.9% speed reduction
Important Note: The 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 13
NOT APPLICABLE
This function is not applicable to this control type.
FUNCTION 14
INTERNAL RESISTANCE
COMPENSATION
FUNCTION 9
REGEN ARMATURE CURRENT LIMIT
This function is used when the Battery Discharge Indicator
is present. Adjustment of this function will improve the
accuracy of the BDI. In order to determine this setting, the
voltage drop of the battery under load must first be
calculated by the following method:
This function allows for the adjustment of the maximum
armature current limit during regenerative braking.
Range
32 to 250 amps
Set
32 to 255
1. Record open circuit voltage (Vo) by measuring the
voltage at the control positive and negative power
terminals.
Resolution
1.0 amps per set unit
Example
Setting of 221 = 221 amps
2. Load the traction motor to 100 amps in 1A and record the
voltage (V
L
) at the control positive and negative power
terminals.
3. Calculate voltage drop (V
Drop
) as follows:
V
Drop
= V
O
- V
L
FUNCTION 10
REGEN FIELD CURRENT LIMIT
This function allows for the adjustment of the maximum
field current limit during regenerative braking.
Range
0 to 20 amps
August 2002