Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual, os 30
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24 NOVEMBER 2015
13. Cycle KSI power.
e motor control should now be operational, though likely poorly
optimized. e Slip Gain test is very important for most, but not all,
motors; you won’t know which until you perform the test and get the
result. e following steps will complete the optimization process.
PART 2a: Traction Systems only
14. Now adjust the SlipGain parameter to provide maximum torque at stall
(0rpm motor speed). Note: e present SlipGain value was determined
by the auto-characterization procedure, and is not the default value.
Motor » Control Algorithms » 0-ACIM » Characterization Tests » SlipGain
is can be accomplished in various ways, but the following two methods
are preferred, with (a) being the most accurate:
(a) Congure the vehicle to measure stall torque, by using a load cell / draw
bar test. Note: You will want to perform this test quickly to avoid excessive
motor heating and provide the most accurate results.
Turn o encoder fault detection (Motor Encoder Fault Setup Fault
Detection Enable).
While applying and holding full throttle, adjust SlipGain until you
measure peak torque.
If you want to have encoder fault detection active, turn it back on.
(b) Set the Accel Rates to very fast values. (In Speed Mode Express: Accel
Rate. In Speed Mode: Full Accel LS, Full Accel HS, Low Accel. In Torque
Mode: Accel Rate.)
On the 1313 programmer, add these two items to the Favorites shortcut,
so you can easily toggle between them:
Monitor » Vehicle » Time to Dist 1
Program » Motor Control Tuning » IM Motor Characterization Tests » SlipGain.
Set Capture Speed 1 (Program Vehicle Capture Speed 1, page 67) to
a value close to the Max Speed setting. e Time to Dist 1 timer monitors
how long it takes the motor to get to this predetermined speed. e timer
starts counting when full throttle is applied and stops counting when Cap-
ture Speed 1 is reached.
is test should be run repeatedly over the same stretch of at or up-
hill ground. Adjust the SlipGain value until the Time to Dist 1 value is
minimized. Loading the vehicle will improve results. Repeat with Capture
Speed 2 and Time to Dist 2.
6a — ACIM INDUCTION MOTOR CHARACTERIZATION
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