ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS
Page
62
Revised May 2003
Section 5.5 Summary of Current Limit Adjustments
ZERO
MAXIMUM
ZE
RO
MA
XIMU
M
FIEL
D CU
RRENT
ARMATURE CURRENT
The
" minimum field
current"
setting is
adjusted by Function 7. The
function sets the top speed
of the motor.
The
maximum field current
of the control is set at 63
amps (nominal). The
maximum armature current
of
the control is set at 600 amps, at 50% on-time
(nominal). Together, these values determine 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 achieved .
The
" ratio"
setting is adjusted by Function
26. This function sets the ratio between
armature and field current when transitioning
from minimum field to maximum field current.
Setting is the value of field current changed for
each 100 amps of armature current changed.
The
"full load transition point"
of this control is set at 500A..
The maximum field current of the control is set at
63 amps (nominal). The maximum armature
current of the control is set at 600 amps, at 50%
on-time (nominal). Together, these values
determine the maximum torque of the motor.
