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[China]
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Address: 23E BlockB,Lushan Building，Chunfeng Road,Luohu District,Shenzhen,518001,China
Contact name:Eva
Shenzhen Wisdomlong Technology CO.,LTD |
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Verified Suppliers
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SPECIFITIONS
YASKAWA ELECTRIC
SGDA-04AS
SGDA-04AS
SERVO CONTROLLER
INPUT: 4AMP 1PHASE 200/230V
OUTPUT: 200W
AVAILABLE
REBUILT SURPLUS
NEVER USED SURPLUS
REPAIR YOURS
24-48 HOUR RUSH REPAIR
2 - 15 DAY REPAIR
2 YEAR RADWELL WARRANTY
When applied properly, the variable frequency drive (VFD) is the most effective motor controller in the industry today. Modern VFDs are affordable and reliable, have flexibility of control, and offer significant electrical energy savings through greatly reduced electric bills.
They are used in a wide variety of applications for various
reasons. For example, they are the most effective energy savers in
pump and fan applications; they enhance process operations,
particularly where flow control is involved. VFDs provide
soft-start capabilities, which decrease electrical stresses and
line voltage sags associated with full voltage motor start-ups,
especially when driving high-inertia loads.
To obtain a clear understanding of the proper and most effective
application of VFDs, you first
should gain a working knowledge of VFD basic theory as well as a
strong familiarity with practical
know-how.
Basic VFD Theory
Applying a VFD to a specific application is no mystery when you
understand the requirements of
the load. Simply put, the VFD must have ample current capability
for the motor so that the motor
can produce the required torque for the load. You must remember
that machine torque is independent of motor speed and that load
horsepower increases linearly with rpm.
VFD applications can be divided into the following individual load
types.
Constant torque loads. These loads represent 90% of all general
industrial machines (other than
pumps and fans). Examples of these load types include general
machinery, hoists, conveyors,
printing presses, positive displacement pumps, some mixers and
extruders, reciprocating
compressors, as well as rotary compressors.
Constant horsepower loads. These loads are
most often found in the machine-tool industry and center driven
winder applications. Examples of constant horsepower loads include
winders, coredriven reels, wheel grinders, large driller machines,
lathes, planers, boring machines, and core
extruders.
Traditionally, these loads were considered DC drive applications
only. With high-performance flux
vector VFD's now available, many DC drive applications of this type
can be now handled by VFDs
Variable torque loads are most often found in variable flow applications, such as fans and pumps. Examples of applications include fans, centrifugal blowers, centrifugal pumps, propeller pumps, turbine pumps, agitators, and axial compressors. VFDs offer the greatest opportunity for energy savings when driving these loads because horsepower varies as the cube of speed and torque varies as square of speed for these loads. For example, if the motor speed is reduced 20%, motor horsepower is reduced by a cubic relationship (.8 X .8 X .8), or 51%. As such, utilities often offer subsidies to customers investing in VFD technology for their applications. Many VFD manufactures have free software programs available for customers to calculate and document potential energy savings by using VFDs.
OTHER SUPERIOR PRODUCTS
