Danfoss VLT AutomationDrive FC 301, Design Manual, Page: 3 / 200

Contents
1 Introduction
8
1.1 Purpose of the Design Guide
8
1.2 Additional Resources
8
1.3 Abbreviations, Symbols and Conventions
8
1.4 Definitions
9
1.5 Document and Software Version
10
1.6 Regulatory Compliance 10
1.6.1 CE Mark 10
1.6.1.1 Low Voltage Directive 10
1.6.1.2 EMC Directive 10
1.6.1.3 Machinery Directive 11
1.6.2 UL Compliance 11
1.6.3 C-tick Compliance 11
1.6.4 Marine Compliance 11
1.7 Disposal Instruction 11
1.8 Safety 11
2 Safety
12
2.1 Safety Symbols 12
2.2 Qualified Personnel 12
2.3 Safety Precautions 12
3 Basic Operating Principles
14
3.1 General 14
3.2 Description of Operation 14
3.3 Sequence of Operation 14
3.3.1 Rectifier Section 14
3.3.2 Intermediate Section 14
3.3.3 Inverter Section 14
3.3.4 Brake Option 14
3.3.5 Load Sharing 15
3.4 Control Interface
15
3.5 Wiring Schematic
16
3.6 Controls
18
3.6.1 Control Principle 18
3.6.2 FC 301 vs. FC 302 Control Principle 19
3.6.3 Control Structure in VVC
+
20
3.6.4 Control Structure in Flux Sensorless (FC 302 only) 21
3.6.5 Control Structure in Flux with Motor Feedback (FC 302 only) 22
Contents
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
MG33BF02 - Rev. 2013-12-20 1