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

Introduction

1.1 Purpose of the Manual

1 1
This manual is intended to provide detailed information for
the installation and start-up of the adjustable frequency
drive. provides requirements for mechanical and electrical
installation, 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.

1.2 Additional Resources

Other resources are available to understand advanced
adjustable frequency drive functions and programming.
•
The AF-600 FP Programming Guide, DET-618
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.

1.3 Product Overview

An adjustable frequency drive is an electronic motor
controller that converts AC line power input into a variable
AC waveform output. The frequency and voltage of the
output are regulated to control the motor speed or torque.
The adjustable frequency drive 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 adjustable frequency drive can also
regulate the motor by responding to remote commands
from external controllers.
In addition, the adjustable frequency drive 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.
1-8
AF-600 FP Design and Installation Guide
1.4 Internal Adjustable Frequency Drive
Controller Functions
Figure 1.8 is a block diagram of the adjustable frequency
drive's internal components. See Table 1.7 for their
functions.
Figure 1.8 Adjustable Frequency Drive Block Diagram
Area
1
2
3
4
5
6
7
DET-768A
Title
•
Line power input Three-phase AC line power
supply to the adjustable
frequency drive
•
Rectifier The rectifier bridge converts
the AC input to DC current to
supply inverter power
•
DC bus Intermediate DC bus circuit
handles the DC current
•
DC reactors Filter the intermediate DC
circuit voltage
•
Provide line transient
protection
•
Reduce RMS current
•
Raise the power factor
reflected back to the line
•
Reduce harmonics on the AC
input
•
Capacitor bank Stores the DC power
•
Provides ride-through
protection for short power
losses
•
Inverter Converts the DC into a
controlled PWM AC waveform
for a controlled variable
output to the motor
•
Output to motor Regulated three-phase output
power to the motor
Functions