Danfoss VLT AHF 005 Design Guide

When running torque control, it is recommended to make a full AMA procedure since the correct motor data is
essential for optimal performance.
•
Process control. Used to control application parameters that are measured by dierent sensors (pressure,
temperature, and ow) and are aected by the connected motor through a pump or fan.
P 20-81
PID Normal/Inverse
Control
PID
Ref.
Handling
Feedback
Handling
Scale to
speed
P 4-10
Motor speed
direction
To motor
control
(Illustra-
tion)
(Illustra-
tion)
130BA359.12

100%
0%
-100%
100%
*[-1]
_
+
Illustration 11.7 Block Diagram of Closed-loop Controller
Programmable features
While the default values for the drive in closed loop often provide satisfactory performance, system control can often be
optimized by tuning the PID parameters. Auto tuning is provided for this optimization.
•
Inverse regulation - motor speed increases when a feedback signal is high.
•
Start-up frequency - lets the system quickly reach an operating status before the PID controller takes over.
•
Built-in lowpass lter - reduces feedback signal noise.
11.2.7 Control Processing
See Active/Inactive Parameters in Dierent Drive Control Modes in the programming guide for an overview of which control
conguration is available for your application, depending on selection of AC motor or PM non-salient motor.
Basic Operating Principles ...
VLT
®
HVAC Drive FC 102
206 Danfoss A/S © 11/2017 All rights reserved. MG16C302
1111

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English