Danfoss VLT AutomationDrive FC 300 Series - Default Chapter; Table of Contents

Contents
1 How to Read this Design Guide
7
1.1.1 Symbols 7
1.1.2 Abbreviations 7
1.1.3 Definitions 8
2 Safety and Conformity
11
2.1 Safety Precautions
11
3 Introduction
15
3.1 Product Overview
15
3.2 Controls
16
3.2.1 Control Principle 16
3.2.2 Controls 16
3.2.3 FC 301 vs. FC 302 Control Principle 17
3.2.4 Control Structure in VVC
plus
18
3.2.5 Control Structure in Flux Sensorless (FC 302 only) 19
3.2.6 Control Structure in Flux with Motor Feedback 20
3.2.7 Internal Current Control in VVC
plus
Mode 21
3.2.8 Local (Hand On) and Remote (Auto On) Control 21
3.3 Reference Handling
22
3.3.1 Reference Limits 24
3.3.2 Scaling of Preset References and Bus References 25
3.3.3 Scaling of Analog and Pulse References and Feedback 25
3.3.4 Dead Band Around Zero 26
3.4 PID Control
30
3.4.1 Speed PID Control 30
3.4.2 Tuning PID Speed Control 33
3.4.3 Process PID Control 33
3.4.4 Optimisation of the Process Regulator 36
3.4.5 Ziegler Nichols Tuning Method 36
3.5 General Aspects of EMC
38
3.5.1 EMC Test Results 38
3.5.3 Immunity Requirements 40
3.6 Mains Supply Interference/Harmonics
41
3.6.1 The Effect of Harmonics in a Power Distribution System 41
3.6.2 Harmonic Limitation Standards and Requirements 42
3.6.3 Harmonic Mitigation 43
3.6.4 Harmonic Calculation 43
3.7 Galvanic Isolation (PELV)
43
Contents
VLT
®
AutomationDrive FC 300 Design Guide, 0.25-75 kW
MG33BE02 - VLT
®
is a registered Danfoss trademark 1
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