Purpose Of The Manual; Additional Resources; Product Overview; Internal Frequency Converter Controller Functions - GE AF-600 FP Series Design And Installation Manual

Introduction

1.2 Purpose of the Manual

This manual is intended to provide detailed information for
the installation and start up of the frequency converter.
provides requirements for mechanical and electrical instal-
lation, including input, motor, control and serial
communications wiring and control terminal functions.
provides detailed procedures for start up, basic operational
programming, and functional testing. The remaining
chapters provide supplementary details. These details
include user interface, detailed programming, application
examples, start-up troubleshooting, and specifications.

1.3 Additional Resources

Other resources are available to understand advanced
frequency converter functions and programming.
•
The AF-600 FP Programming Guide, DET-620
provides greater detail on working with
parameters and many application examples.
•
Optional equipment is available that may change
some of the procedures described. Reference the
instructions supplied with those options for
specific requirements. Contact the local GE
supplier or visit the GE website for downloads or
additional information.

1.4 Product Overview

A frequency converter is an electronic motor controller
that converts AC mains input into a variable AC waveform
output. The frequency and voltage of the output are
regulated to control the motor speed or torque. The
frequency converter can vary the speed of the motor in
response to system feedback, such as changing
temperature or pressure for controlling fan, compressor, or
pump motors. The frequency converter can also regulate
the motor by responding to remote commands from
external controllers.
In addition, the frequency converter monitors the system
and motor status, issues warnings or alarms for fault
conditions, starts and stops the motor, optimizes energy
efficiency, and offers many more control, monitoring, and
efficiency functions. Operation and monitoring functions
are available as status indications to an outside control
system or serial communication network.
1.5 Internal Frequency Converter Controller
Functions
Illustration 1.8 is a block diagram of the frequency
converter's internal components. See Table 1.7 for their
functions.
TM
AF-600 FP Design and Installation Guide
Illustration 1.8 Frequency Converter Block Diagram
Area
1
2
3
4
5
6
7
8
Table 1.7 Legend to Illustration 1.8
DET-768b
Title
•
Three-phase AC mains power
supply to the frequency
Mains input
converter
•
The rectifier bridge converts
the AC input to DC current to
Rectifier
supply inverter power
•
Intermediate DC-bus circuit
DC bus
handles the DC current
•
Filter the intermediate DC
circuit voltage
•
Prove line transient protection
•
Reduce RMS current
DC reactors
•
Raise the power factor
reflected back to the line
•
Reduce harmonics on the AC
input
•
Stores the DC power
•
Provides ride-through
Capacitor bank
protection for short power
losses
•
Converts the DC into a
controlled PWM AC waveform
Inverter
for a controlled variable
output to the motor
•
Regulated three-phase output
Output to motor
power to the motor
•
Input power, internal
processing, output, and motor
current are monitored to
provide efficient operation
and control
Control circuitry
•
User interface and external
commands are monitored and
performed
•
Status output and control can
be provided
1
Functions
11
1