Chapter 12 Description of Parameter SettingsC2000 Plus
12.2-7
Adjustment for operation with heavy load
9. Load operating test
B1. Low-frequency loading performance is below 1/10 of rated frequency:
a. If the low-frequency loading performance is insufficient, or the rotor speed is not smooth,
increase Pr.10-31 (current command of I/F mode).
b. If the low-frequency current is large, decrease Pr.10-31 (current command of I/F mode).
B2. Test the with-load accelerating performance:
When the motor operates in 1/10 of rotor speed and above, if the speed cannot follow the
acceleration time during accelerating, or the current stalls, increase Pr.07-38 (PMSVC
voltage feedback forward gain).
10. Stability test at constant speed operation: the motor operates stably at constant speed
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.
PM SVC related parameters
Refer to Section 12-1 Description of Parameter Settings for more details.
Parameter Description Unit Default Setting Range
Pr.07-24 Torque command filter time sec. 0.500 0.001–10.000
Pr.07-26 Torque compensation gain NA 0 0–5000
Pr.07-38 PMSVC voltage feedback forward gain NA 1.0 0.00–2.00
Pr.10-31 I/F mode, current command % 40 0–150
Pr.10-32
PM FOC sensorless speed estimator
bandwidth
Hz 5.00 0.00–600.00
Pr.10-34
PM sensorless speed estimator low-pass
filter gain
NA 1.00 0.00–655.35
Pr.10-39
Frequency point to switch from I/F mode to
PM sensorless mode
Hz 20.00 0.00–599.00
Pr.10-40
Frequency point to switch from PM
sensorless mode to V/F mode
Hz
20.00 /
40.00
0.00~599.00 /
30.00~599.00
Initial Angle Estimating Parameters
Pr.10-42 Initial angle detection pulse value NA 1.0 0.0–3.0
Pr.10-51 Injection frequency Hz 500 0–1200
Pr.10-52 Injection magnitude V
15.0/
30.0
0.0–200.0
Pr.10-53
PM initial rotor position detection method
0: Disable
1: Force attracting the rotor to zero degrees
2: High frequency injection
3: Pulse injection
NA 0 0–3