
ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS
Page
68
September 2004
Section 6.5 Summary of Current Limit Adjustments
ZERO
MAXIMUM
ZE
RO
MA
X
IM
U
M
F
IEL
D CURRENT
ARMATURE CURRENT
The " minimum field
current" setting is adjusted
by Function 7. The function
sets the top speed of the
motor.
The "armature current limit"
setting is adjusted by Function 4.
The function along with the
"maximum field current",
Function 8, sets the maximum
torque of the motor.
The " field weakening start"
setting is adjusted by Function
24. This function sets the
armature current at which
minimum field current will be
achieved .
The " ratio" setting is adjusted by Function 26.
This function sets the ratio between armature
and field current when operating, I
MOTOR
is
above FWS and less than the full load
transistion point. Setting is the value of field
current changed for each 100 amps of
armature current changed.
The "full load transition point"
The "maximum field current" setting is
adjusted by Function 8. This function, along
with the "armature current limit", Function 4,
sets the maximum torque of the motor.