Curtis 1232E Manual page 100

6a — ACIM INDUCTION MOTOR CHARACTERIZATION
96
2 4 N O V E M B E R 2 0 1 5
15. Run the FW Base Speed test.
Set the
FW Base Speed
that have a reasonable charge.
Motor » Control Algorithms » 0-ACIM » Field Weakening Control » FW Base Speed
Set the Accel Rates to be very fast, so that you'll be accelerating at full
current during the test. From a stop, quickly apply full throttle to accelerate
to a high speed. After the motor settles at a speed for a moment, release the
throttle to stop. Note the value of the Base Speed Captured (Monitor » Con-
troller » Motor Tuning » Base Speed Captured), and enter this value for the
FW Base Speed setting.
+ The test restarts each time the vehicle comes to a stop and the throttle is
released, so be sure to note the value before driving away.
16. Decide between more efficient or more torque operation at high speeds, by
adjusting
Field Weakening Drive
value (0%) was determined by the auto-characterization procedure, and is
not the default value (50%).
Motor » Control Algorithms » 0-ACIM » Field Weakening Control »
Increasing the parameter toward 100% will progressively allow more torque
(along with more current) at high motor speeds, but increasing it too much
will actually reduce torque while still driving a great deal of current. The
auto-characterization value of 0% will give the most efficient motor oper-
ation, but will not give the highest torque at high speeds.
If more torque is required at high speeds, you will need to run the Field
Weakening Drive test.
On the 1313 programmer, add these two items to the Favorites shortcut,
along with Field Weakening Drive, so you can easily toggle between them:
Monitor » Vehicle » Time Between Speeds (page 83)
Program » Vehicle »Capture Speed 1, 2 (page 67).
Set
Capture Speed 1
setting. Ideally the Capture Speed 1, 2 values should be above the second
corner point of the motor torque – speed curve. For example, if the Max
Speed is set to 4000 rpm, set Capture Speed = 3500 rpm and Capture Speed
2 = 3800 rpm:
Program » Speed Mode Express »Max Speed (page 30)
Program » Speed Mode »Speed Controller »Max Speed (page 31)
Program » Torque Mode »Speed Limiter »Max Speed (page 37)
From a stop, apply full throttle to accelerate to a speed greater than
Capture Speed 2. Note the value displayed in Monitor » Vehicle » Time
Between Speeds.
Now increase the Field Weakening Drive setting and repeat the accel-
eration in the same direction, with the same load, and with the same full
throttle and again note the Time Between Speeds value.
to 6000 rpm. The test should be run with batteries
. Note: The present Field Weakening Drive
and to values that are close to the Max Speed
2
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual,
Field Weakening Drive
30
os