Delta VFD-ED Series, User Manual

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Ch12 Descriptions of Parameter Settings | VFD-ED
12-92
 Mechanical inertia reference value (%):
Load / Motor IM PM
Without load 40 10
With load 80–120 40

Zero speed Bandwidth
Control Mode FOCPG FOCPM
Default: 10
Settings 1–40 Hz

Low speed Bandwidth
Control Mode FOCPG FOCPM
Default: 10
Settings 1–40 Hz

High speed Bandwidth
Control Mode
FOCPG FOCPM
Default: 10
Settings 1–40 Hz
 After estimating the inertia and setting Pr.11-00 =1 (auto-tuning), you can adjust parameters Pr.11-06,
Pr.11-07 and Pr.11-08 separately by speed response. The larger the value, the faster the response.
Pr.10-17 is the switch frequency between the low speed and high speed bandwidth.

PDFF Gain Value
Control Mode FOCPG FOCPM Default: 30
Settings 0–200%
 After you estimate and set Pr.11-00=1 (auto-tuning), use Pr.11-09/11-10 to reduce overshoot. Adjust the
PDFF gain value according to the actual situation.
 In addition to traditional PI control, it also provides the PDFF function to reduce overshoot for speed control.
1. Get system inertia
2. Set Pr.11-00 to 1
3. Adjust Pr.11-09 and Pr.11-10 (a larger value suppresses overshoot better). Adjust according to the
actual condition.
PI
PDFF
It is recommended to disable
this function (Pr.11-09=0) for
Y/ connection switch and
ASR1/ASR2 switch application.

Speed Feed Forward Gain
Control Mode FOCPG FOCPM Default: 0
Settings 0–500

Pr.11-09 and Pr.11-10 are enabled when Pr.11-00 is set to Bit 0 = 1.

Notch Filter Depth
Control Mode FOCPG FOCPM Default: 0
Settings 0–20 db