Open-loop Start-up
12
Rollback or Bump at Start
If rollback is observed or a bump is felt at the
start, then until resolved, try the following (in
order):
1. Verify Mechanical Brake Timing
2. Increase DC Injection Start Level
Note: if no performance change is observed
after any one step, set any changed value(s)
back to the original value(s) before
proceeding onto the next step.
Verify Mechanical Brake Timing
•
The mechanical brake should be picked
during the DC injection start time (DC
START TIME (A1) parameter), see
“Mechanical Brake Timing at Start” on
page 17.
Increase DC Injection Start Level
•
Increase the DC START LEVEL (A1)
parameter by increments of 5% and
observe performance.
Decreasing Take-off Time
The following can help to decrease take-off time,
try the following (in order):
1. Increase DC Injection Start Level
2. Increase the Accel S-curve parameters
3. Increase the Torque Boost Gain
parameter
Note: if no performance change is observed
after any one step, set any changed value(s)
back to the original value(s) before
proceeding onto the next step.
Increase DC Injection Start Level
•
Increase the DC START LEVEL (A1)
parameter by increments of 5% and
observe performance.
Increase the Accel S-curve parameters
•
Increase take-off jerk rate via ACCEL
JERK IN x (A2) parameter
•
Increase acceleration rate via ACCEL x
(A2) parameter
Note: When increasing both jerk and accel
rates, watch for Overcurrent Faults or
decreased ride quality. If these occur, set
the rates back to the original values.
Increase the Torque Boost Gain Parameter
•
The Torque Boost function is defaulted
off (TORQ BOOST GAIN (A1)= 0).
•
Increase the TORQ BOOST GAIN (A1)
in 0.1 intervals and observe take-off
time and performance.
Note: When increasing the torque boost,
watch for Overcurrent Faults or decreased
ride quality. If these occur, set the gain
back.
Overcurrent Fault
If an “OVERCURR FLT” occurs it can indicate
the s-curve settings are too high (jerk, accel,
decel rates) or too much motor voltage is
generated. Until resolved, try the following (in
order):
1. Verify Mechanical Brake Timing
2. Verify Torque Limits
3. Decrease the S-curve parameters
4. Verify Motor Min/Mid Voltage
parameters
5. Measure the Motor’s Stator Resistance
6. Decrease the Torque Boost
Note: if no change is observed after any one
step, set any changed value(s) back to the
original value(s) before proceeding onto the
next step.
Verify Mechanical Brake Timing
•
The mechanical brake should be lifted
before the drive is given a non-zero
speed command
•
The mechanical brake should be picked
during the DC injection start time (DC
START TIME (A1) parameter) , see
“Mechanical Brake Timing at Start” on
page 17.
Verify Torque Limits
•
The Torque Limits are defaulted at
200% (MTR TORQUE LIMIT(A1) and
REGEN TORQ LIMIT(A1)= 200%).
•
Decrease MTR TORQUE LIMIT (A1)
and REGEN TORQ LIMIT (A1)
parameters until default (200%).
Note: may need to set torque limits
below 200% if motor’s current rating is
larger than the drive’s current rating
Содержание HPV 600
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