Application Guide

63-7062 6
Programmable
Programmable
Multiple
Multiple
Digital &
Digital &
Analogue
Analogue
Inputs
Inputs
Programmable
Programmable
Multiple
Multiple
Digital &
Digital &
Analogue
Analogue
Outputs
Outputs
RS232
RS232
Interbus S
Interbus S
Profibus
Profibus
Echelon
Echelon
Option Card
Option Card
RST
PG
MONPARREFBTNS
RUNREADYFAULT
Honeywel
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Fig. 2. VFD Functionality.
For non specialized use, there have always been four clearly defined areas of motor speed control, which require four different
types of machines:
General Purpose AC Machine
Used on fans, pumps and machinery of all types, where
average performance
is required using either single or three-phase
Vac supply driving a standard induction motor.
Flux Vector
High performance machine providing very high accuracy in speed and torque control, over wide operating range. Newer
designs challenging the DC drive for High Torque at very low speeds. Special motors often required.
Spindle Drive
Very high performance machine used in mechanical handling and machine tool applications where high dynamic response is
critical. These machines have many features of the Vector Flux VFD but often have much more input and output capability, to
provide the necessary interfacing with the
outside world
. They almost always require a special motor.
DC Drive
DC drives are still prevalent in the drive industry, making up some 40% of the market. VFD performance has improved so much
in the recent past, that DC drives are often replaced with AC machines that provide added benefits. There are applications, in
particular very large, high-power, low-speed drives, where DC will be used for many years to come.
Advancements in design and expertise now allow the combination of functionality and performance of General Purpose, Flux
Vector, Spindle Drive and to some extent the DC drive in the
one
package. However, the motor will have to be an AC type.
User Benefits
•
One machine covers all applications.
•
Lower spares cost.
•
Fewer different variants for technicians to work with.
•
Possible general reduction is costs: higher volume production.
•
Interchangeability.
This
universal
approach is adopted by most high volume manufacturers as it is seen as the ultimate goal. (Fig. 3)