Internal Controller Functions; Frame Sizes And Power Ratings - Danfoss FC 102 Operating Instructions Manual

Introduction

1.5 Internal Controller Functions

Illustration 1.4 is a block diagram of the frequency
converter's internal components.
Illustration 1.4 Frequency Converter Block Diagram
Area Title
•
1 Mains input
•
2 Rectifier
•
3 DC-bus
•
•
•
4 DC reactors
•
•

1.6 Frame Sizes and Power Ratings

kW High Overload
kW Normal Overload
400 V
500 V
525 V
690 V
Table 1.4 kW Rated Frequency Converters
HP High Overload 100
HP Normal Overload 125
460 V
575 V D3h
Table 1.5 HP Rated Frequency Converters
MG16D302
Operating Instructions
Functions
3-phase AC mains supply to the
frequency converter
The rectifier bridge converts the
AC input to DC current to
supply inverter power.
Intermediate DC-bus circuit
handles the DC current.
Filter the intermediate DC circuit
voltage.
Prove line transient protection.
Reduce RMS current.
Raise the power factor reflected
back to the line.
Reduce harmonics on the AC
input.
75 90
90 110
D3h
D3h D3h
D3h
125 150
150 200
D3h D3h
D3h D3h
Danfoss A/S © Rev. 06/2014 All rights reserved.
Area Title
5 Capacitor bank
6 Inverter
7 Output to motor
8 Control circuitry
Table 1.3 Legend to Illustration 1.4
110 132 160 200
132 160 200 250
D3h D3h D4h D4h
D3h D3h D3h D4h
D3h D4h D4h D4h
D3h D3h D4h D4h
200 250
250 300
D3h D4h
D4h D4h
Functions
•
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
•
Input power, internal
processing, output, and motor
current are monitored to
provide efficient operation and
control.
•
User interface and external
commands are monitored and
performed.
•
Status output and control can
be provided.
250 315 315
315 355 400
D4h
D4h D4h
D4h
D4h D4h
300 350 350
350 400 450
D4h D4h
D4h D4h
1 1
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