Danfoss VLT Midi Drive FC 280 Design Guide

works for 2 directions. The torque is calculated
from the internal current measurement in the
frequency converter.
Speed/torque reference
The reference to these controls can be either a single
reference or the sum of various references including
relatively scaled references. Reference handling is explained
in detail in chapter 2.4 Reference Handling.
Process control
There are 2 types of process control:
•
Process closed-loop control, which runs speed
open-loop to control the motor internally, is a
basic process PID controller.
•
Extended PID speed open-loop control, which
also runs speed open-loop to control the motor
internally, extends the function of the basic
process PID controller by adding more functions.
For example, feed forward control, clamping,
reference/feedback lter, and gain scaling.
Product Overview
VLT
®
Midi Drive FC 280
18 Danfoss A/S © 03/2016 All rights reserved. MG07B102
22

Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English