Chapter 12 Description of Parameter SettingsC2000 Plus
12.2-43
No-load operation adjustment
7. Start the motor without load
A1. Start the motor without load, refer to the following adjustment before the operation
frequency reaches 1/5 or motor’s rated frequency:
a. If the motor starts in a wrong direction, the starting rotation is not smooth (ocA) or there
is motor shaft lock, adjust Pr.10-31 (I/F mode, current command) and Pr.10-33 (PM
FOC sensorless low-speed estimator bandwidth).
b. When there is an extreme vibration of the motor speed, adjust Pr.11-01 (per-unit of
system inertia) and Pr.11-03 (ASR1 low-speed bandwidth) depending on whether the
motor departs from the load.
Setting curve for speed regulator (ASR) and related parameters:
Parameter Description Default
11-00 System control 201h
11-01 Per-unit of system inertia 256
11-02
ASR1 / ASR2 switch frequency
(it’s recommended that the switch frequency is higher than
Pr.10-39)
10 Hz
11-03 ASR1 low-speed bandwidth 5 Hz
11-04 ASR2 high-speed bandwidth 5 Hz
11-05 Zero-speed bandwidth 5 Hz
A2. The operation frequency exceeds the switch frequency for Pr.10-39
a. If there is an extreme vibration of speed and current when switching frequency, or a
fault occurs during the switching process, adjust Pr.10-56 (Kp of phase-locked loop).
b. Both of adjustments for Pr.10-55 (magnetic flux linkage estimate high-speed gain)
and Pr.10-56 (Kp of phase-locked loop) affect the performance of the speed
estimator. Adjust only Pr.10-56 in no-load operation.
A3. Observe whether the motor operates stably when accelerates to the maximum frequency
If the motor stalls at the maximum operation speed, decrease Pr.10-56 (Kp phase-locked
loop)
To Next Page
Loading...
Need help?
General