96
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual, os 30
24 NOVEMBER 2015
15. Run the FW Base Speed test.
Set the
FW Base Speed to 6000 rpm. e test should be run with batteries
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.
e 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 ecient or more torque operation at high speeds, by
adjusting
Field Weakening Drive. Note: e present 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 »
Field Weakening Drive
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. e
auto-characterization value of 0% will give the most ecient 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 and 2 to values that are close to the Max Speed
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.
6a — ACIM INDUCTION MOTOR CHARACTERIZATION
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