Delta C2000 Series User Manual page 618

 Adjustment for Operation with Light duty
8. Start the motor with no-duty / light-duty, 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.
b. If an ocA error occurs when pressing RUN to start the motor, decrease the current
proportion for Pr. 10-42 (Initial angle detection pulse value). An excessive pulse current
may cause ocA error easily.
A2. Operates the motor in 1/2 of the rated rotor speed, adjust the no-load operating current
If the no-load operating current exceeds 20% of the rated current, increase Pr. 07-26
(Torque compensation gain) and observe the no-load operating current.
A3. Accelerate to rated frequency and observe if the motor operates stably.
a. If the motor output rotor speed presents periodic low-frequency wave, increase Pr. 10-34
(PM sensorless speed estimator low-pass filter gain), or increase Pr. 10-32 (PM FOC
sensorless speed estimator bandwidth).
b. If the output frequency reflects high-frequency vibration, decrease Pr. 10-34 or decrease
Pr. 10-32.
A4. Accelerate the motor to the maximum rotor speed, and observe if it operates stably.
If the motor stalls when accelerating to the maximum rotor speed, then increase Pr. 10-34
PM Sensorless Speed Estimator Low-pass Filter Gain, or increase Pr. 00-17 Carrier
Frequency (you must set the carrier frequency larger than 10 times of the maximum output
frequency)
Chapter 12 Description of Parameter SettingsC2000
12.2-00-23