Delta Electronics VFD-VL manual 11-10, 11-11, 11-12

Chapter 4 Parameters

After finishing estimating and set Pr.11-00=1 (auto tuning), using Pr.11-09/11-10 to reduce overshoot. Please adjust PDFF gain value by actual situation.

Besides traditional PI control, it also provides PDFF function to reduce overshoot for speed control.

1.Get system inertia

2.Set Pr.11-00 to 1

3.Adjust Pr.11-09/11-10 (the larger number is set and the suppressed overshoot function will be better. But it needs to be used by 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.

11-10	Gain for Speed Feed Forward		Unit: 1
Control	FOCPG	FOCPM	Factory Setting: 0
mode
	Settings	0 to 500

Pr.11-09 and Pr.11-10 will be enabled when Pr.11-00 is set to Bit0=1.

11-11	Notch Filter Depth		Unit: 1
Control	FOCPG FOCPM		Factory Setting: 0
mode
	Settings	0 to 20 db
11-12	Notch Filter Frequency		Unit: 0.01
Control	FOCPG FOCPM		Factory Setting: 0.00
mode
	Settings	0.00 to 200.00Hz

This parameter is used to set resonance frequency of mechanical system. It can be used to suppress the resonance of mechanical system.

The larger number you set Pr.11-11, the better suppression resonance function you will get. The notch filter frequency is the resonance of mechanical frequency.

Revision Nov. 2008, VLE1, SW V1.03 4-107