Delta VFD040C43A-21 User Manual

Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-10-12

10-35
ARM (Kp) Gain
Default: 1.00
Settings 0.00–3.00
 If Pr.00-11 = 8 (SynRM sensorless), then the default becomes 0.40.

10-36
ARM (Ki) Gain
Default: 0.20
Settings 0.00–3.00
 Active Magnetic Regulator Kp / Ki, affects the response of magnetic regulation in the low
magnetic area.
 If entering the low magnetic area and the input voltage (or DC bus) plummets (e.g. an unstable
power net causes instant insufficient voltage, or a sudden load that makes DC bus drop), which
causes the ACR diverge and oc, then increase the gain. If the Id value of a spur creates large
noise in high-frequency output current, decrease the gain to reduce the noise. Decrease the gain
will slow down the response.
 If Pr.00-11 = 8 (SynRM sensorless), then the default becomes 2.00.

10-37
PM Sensorless Control Word
Default: 0000h
Settings 0000–FFFFh
bit No. Function Description
5 Choose a control mode to stop
0: When lower than Pr.10-40, ramp to stop
1: When lower than Pr.10-40, coast to stop

10-39
Frequency to Switch from I/F Mode to PM Sensorless Mode
(Frequency to Switch from IMVF Mode to IMFOCPG Mode when Pr.11-00
bit11 = 1 in IMFOCPG Mode)
Default: 20.00
Settings 0.00–599.00 Hz
 Set the frequency for switching from low frequency to high frequency, and sets the switch point
for high and low frequencies of the speed observer.
 If the switch frequency is too low, the motor does not generate enough back-EMF to let the speed
observer measure the right position and speed of the rotor, causing stall and oc when running
at the switch frequency.
 The active range of I/F is too wide if the switch frequency is too high, this generates a larger
current and cannot save energy. (If the current value for Pr.10-31 is too high, the high switch
frequency makes the drive continue to output with Pr.10-31 setting value.)
 If Pr.00-11 = 8 (SynRM sensorless), then the default becomes 10.00 Hz.
 When Pr.11-00 bit11 = 1, Pr.10-39 is the frequency for switching from IMVF to IMFOCPG control
modes.

Delta VFD040C43A-21 Specifications

General

Brand	Delta
Model	VFD040C43A-21
Category	DC Drives
Language	English