Delta VFD040C43A-21 User Manual

Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-10-16
 Increasing the parameter can increase the accuracy of the angle estimation, but the
electromagnetic noise might be louder if the setting value is too high.
 The system uses this parameter when the motor’s parameter is “Auto”. This parameter
influences the angle estimation accuracy.
 When the ratio of the salient pole (Lq/Ld) is lower, increase Pr.10-52 to make the angle detection
more accurate.
 Pr.10-51 is valid only when it's in IPM sensorless control mode or Pr.10-53 = 2.
 If Pr.05-33 = 3 (SynRM), then the unit becomes %, and the setting range becomes 10–50%, the
default becomes 30%.

10-53
PM Initial Rotor Position Detection Method
Default: 0
Settings 0: Disabled
1: Force attracting the rotor to zero degrees
2: High frequency injection
3: Pulse injection
 When Pr.00-11 = 2 (PMSVC) or Pr.00-11 = 6 (PM Sensorless), for IPM, the setting value is
suggested to be 2; for SPM, the setting value is suggested to be 3. You can choose the setting
1 if the result is not good of setting as 2 or 3.

10-54
Magnetic Flux Linkage Estimate Low-speed Gain

10-55
Magnetic Flux Linkage Estimate High-speed Gain
Default: 100
Settings 10–1000%
 Pr.10-54 is the magnetic linkage estimator gain in which the estimated speed is smaller than 1/5
of motor’s rated speed.
 Pr.10-55 is the magnetic linkage estimator gain in which the estimated speed is equal to or larger
than 1/5 of motor’s rated speed.
 Both Pr.10-54 and Pr.10-55 are valid only when the speed mode is PM Sensorless or SynRM
Sensorless (Pr.00-11 = 6 or 8).
 A larger Pr.10-54 setting value helps improve the load capacity at start-up.
 A larger Pr.10-55 setting value helps improve the load capacity in high-speed range and quicken
the response to magnetic linkage estimator.
 If speed oscillation occurs in the flux-weakening region, set Pr.10-55 to a smaller value.
 If Pr.05-33 = 3 (SynRM), then the unit becomes Pu, the setting range becomes 0.1–3.0, and the
default becomes 1.0.

10-56
Kp of Phase-locked Loop
Default: 100
Settings 10–1000%
 A larger Pr.10-56 setting value helps improve the load capacity in high-speed range and quicken
the response to magnetic linkage estimator.
 Decrease the setting value when the speed output frequency has high-frequency oscillation.

Delta VFD040C43A-21 Specifications

General

Brand	Delta
Model	VFD040C43A-21
Category	DC Drives
Language	English