50
Curtis 1230 Manual,
Rev. C
6
Fine tuning of motor control parameters
(see page 36)
This procedure is conducted after the vehicle is taken down off the blocks. If a
motor or vehicle test bench is available, is should be used for this procedure as
it is the easiest and most accurate way to make these adjustments. Otherwise,
perform this procedure while driving the vehicle.
Be extremely careful
when
driving the vehicle during this procedure. Be sure there is plenty of room around
the vehicle. Operating on a ramp will allow you to apply varying torque loads.
6
-a
. Measure the no load motor current at different speeds. Increase
the Min Motor Voltage parameter until the motor current at low speed is the
same as at mid to high speeds.
6
-b
. Stall the motor and measure the torque and motor current for
different Accel Slip parameter settings. Adjust the Accel Slip to the value with
the highest torque/current ratio. Adjust the Accel Slip Voltage to achieve the
desired maximum motor current.
6
-c
. Measure the full load motor current at different speeds within the
constant torque operating area (see Figure 16). Increase the Accel Compensa-
tion paramaeter until the maximum motor current is constant in this operating
area.
6
-d
. Measure the full load torque in the high speed range with differ-
ent settings for the Pull Out Slip parameter. Set the Pull Out Slip to the value
with the highest torque measurement.
6
-e
. Measure the full load motor current at different speeds within
the constant power operating area (see Figure 16). Increase the Slip Boost
parameter until the maximum motor current is constant within the constant
torque operating area.
6
-f
. Measure the torque and motor current at medium speed and full
regeneration for different Regen Slip parameter values. Set the Regen Slip to
the value with the highest torque/current ratio.
6
-g
. Measure the full regeneration motor current at low speed (about
20% of Nominal Motor Frequency). Adjust the Regen Slip Voltage until the
motor current is approximately the same as for full load accelerating.
6
-h
. Measure the full regeneration motor current at different speeds
within the constant torque operating area (see Figure 16). Increase the Regen
Compensation parameter until the maximum motor current is constant across
the constant torque operating area.
6
-i
. Measure the full regeneration motor current at different very low
speeds (about 5 to 15% of Nominal Motor Frequency). Adjust the Regen Offset
Voltage to limit the maximum motor current to the same level as for full load
accelerating. Note: Especially for higher power motors it may be impossible to
get a constant maximum regenerating current; to find the best compromise,
repeat steps 6-g through 6-i iteratively.
When the initial setup has been successfully completed, use the guidelines in
Section 6 to adjust the various programmable parameters as needed to provide
the desired performance.
5 — INITIAL SETUP
Summary of Contents for MultiMode 1230
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