Delta VFD300C43S-HS User Manual page 493

II. PMSVC Adjustment for Operation without Load / with Light-load
SPM > Increase Pr.10-42
Initial angle detection pulse
value
IPM > Increase Pr.10-52
Injection magnitude
Start running
direction error
Increase torque offset
Pr.07-26
No-load current is too high
Increase low-pass filter gain
Pr.10-34
Increase speed estimation
bandwidth Pr.10-32
Periodic low-frequency wave
Increase low-pass filter gain Pr.10-34
Increase carrier frequency Pr.00-17
（Carrier frequency need to be >10
times of the max. output frequency)
 Adjustment for Operation with Light-load
8. Start the motor with no-load / light-load, and operates to 1/2 of the rated rotor speed
A1. Start operation direction:
a. If the start operation direction is wrong
SPM: increase the current proportion for Pr.10-42 (Initial angle detection pulse value) to
improve the accuracy of the angle detection.
IPM: Increase the voltage for Pr.10-52 (Injection magnitude) to improve the accuracy of the
angle detection.
8. No-load
Running
A1. Start running
NO
direction is
YES
A2. No-load current
runs with ½ of rated
rotor speed
NO
No-load running
current is normal?
YES
NO
A3. Acceleration to
Output frequency
rated frequency is
YES
A4. Reach
NO
max. output
Motor stall at max.
frequency?
rotor speed
YES
9. Running Test
with Load
12.2-00-23
Chapter 12 Description of Parameter SettingsC2000-HS
Initial angle detection pulse value
（Too high pulse bandwidth may
Press RUN, then ocA
correct?
(over current) occurs
No-load current is
10%~20% of rated
Increase low-pass filter gain
Decrease speed estimation
Strongly high-frequency
stable?
vibration of output frequency
SPM > Decrease Pr.10-42
cause ocA）
角度偵測脈衝頻寬
current range
Pr.10-34
bandwidth Pr.10-32