Block Diagram Of The Drive - Danfoss VLT FC 280 Operating Manual

VLT® Midi Drive FC 280
Operating Guide

1.4.2 Block Diagram of the Drive

T2/T4
1 2 3
4
5
1 2
4
9
Illustration 1: Block Diagram of the Drive
Table 2: Functions of Each Component
Area Component Functions
1 Mains input
•
2 Rectifier
•
3 DC bus
•
4 DC reactor
•
•
•
•
•
5 Capacitor
•
bank
•
6 Inverter
•
7 Output to
•
motor
10 | Danfoss A/S © 2022.02
10 6
7
8
S2
3 6
7
5
8
AC mains supply to the drive.
The rectifier bridge converts the AC input to DC current to supply inverter power.
Intermediate DC-bus circuit handles the DC current.
Filters the intermediate DC circuit current.
Provides mains transient protection.
Reduces the root mean square (RMS) current.
Raises the power factor reflected back to the line.
Reduces harmonics on the AC input.
Stores the DC power.
Provides ride-through protection for short power losses.
Converts the DC into a controlled PWM AC waveform for a controlled variable output to the motor.
Regulated 3-phase output power to the motor.
M
M
Introduction
AQ381425076031en-000101 / 130R1223