NEW ORIGINAL 15KW SERVOPACK Input 200-230v 50/60hz 3Phase
SGDB-1EADG
SPECIFICATION
SGDB-44ADS
12 month Warranty
Fully functionally tested, cleaned and factory reset (if necessary)
Professionally refurbished
Refurbished items may feature minor cosmetic blemishes and are not
supplied with original packaging or accessories.
Supplies are limited and subject to prior sale
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SGDB-20AD
IntroductionThis Section describes the applicability of this User
ManualThe E7 Drive is a Pulse Width Modulated Drive for AC
induction motors. This type of Drive is also known as an
AdjustableFrequency Drive, Variable Frequency Drive, AC Drive, AFD,
ASD, VFD, and Inverter. In this manual, the E7 Drive will
bereferred to as the "Drive".The E7 Drive is a variable torque AC
drive, designed specifically for HVAC applications in building
automation, includingfans, blowers and pumps. A new benchmark for
size, cost, performance, benefits, and quality, the E7 includes
numerousbuilt-in features such as network
communications, H/O/A, PI, and energy-savings functions.®The E7 has
embedded communications for the popular building automation
protocols, Johnson Controls MetasysandTM®®Siemens APOGEEFLN, as
well as Modbus.
There are three different types of ASD's on the market that
primarily differ in the type of rectification they use to convert
AC to DC and back to AC.
C VVI - Variable Voltage Input
C CSI - Current Source Input
C PWM - Pulse Width Modulated
These drives take the AC input voltage and frequency, covert it to
DC using rectifiers, then convert it back to AC in an invertor
which changes the voltage and frequency.
Variable Voltage Input (VVI)
The VVI is the oldest AC drive technology and was the first AC
drive to gain acceptance in the industrial market.
C The VVI is sometimes called a “six-step drive” due to the shape
of the voltage waveform it sends to the motor.
C VVI drives are fairly economical between 25 and 150 horsepower
for ranges of speed reduction from 15 to 100% (about 10 to 60
Hertz).
C These drives are also used widely on specialty high speed
applications (400 to 3000 Hertz).
Advantages:
good speed range
multiple motor control from one unit
simple control regulator
Disadvantages:
Power Factor decreases with
decreasing speed
Poor ride through ability for low input
voltage
Generates significant output
harmonics
Low Speed Motor Cogging (shaft pulsing/jerky motion)
Requires Isolation Transformer on Input Side
During low speed operation (below 15-20 Hz) cogging can be a
problem where the jerky motion of
the motor shaft can create problems for bearings, gears, or gear
reducers.
where F is in newtons when B is in tesla, I in amperes, and l in
metres. This is a delightfully simple formula, and it may come as a
surprise to some readers that there are no constants of
proportionality involved in
6 Electric Motors and Drives equation 1.2. The simplicity is not a
coincidence, but stems from the fact
that the unit of current (the ampere) is actually deWned in terms
of force.
Strictly, equation 1.2 only applies when the current is
perpendicular to the Weld. If this condition is not met, the force
on the conductor will be less; and in the extreme case where the
current was in the same direction
as the Weld, the force would fall to zero. However, every sensible
motor designer knows that to get the best out of the magnetic Weld
it has to be perpendicular to the conductors, and so it is safe to
assume in
the subsequent discussion that B and I are always perpendicular. In
the remainder of this book, it will be assumed that the Xux density
and current are mutually perpendicular, and this is why, although B
is a
vector quantity (and would usually be denoted by bold type), we can
drop the bold notation because the direction is implicit and we are
only interested in the magnitude.
The reason for the very low force detected in the experiment with
the bar magnet is revealed by equation 1.2. To obtain a high force,
we must have a high Xux density, and a lot of current. The Xux
density at the ends of a bar magnet is low, perhaps 0.1 tesla, so a
wire carrying 1 amp will experience a force of only 0.1 N/m
(approximately 100 gm wt). Since the Xux density will be conWned to
perhaps 1 cm across the end face of the magnet, the total force on
the wire will be only 1 gm. This would be barely detectable, and is
too low to be of any use in a decent motor. So how is more force
obtained?
The Wrst step is to obtain the highest possible Xux density. This
is achieved by designing a ‘good’ magnetic circuit, and is
discussed next. Secondly, as many conductors as possible must be
packed in the space
where the magnetic Weld exists, and each conductor must carry as
much current as it can without heating up to a dangerous
temperature. In this way, impressive forces can be obtained from
modestly sized devices, as anyone who has tried to stop an electric
drill by grasping the chuck will testify.
OTHER SUPERIOR PRODUCTS
| Yasakawa Motor, Driver SG- | Mitsubishi Motor HC-,HA- |
| Westinghouse Modules 1C-,5X- | Emerson VE-,KJ- |
| Honeywell TC-,TK- | GE Modules IC - |
| Fanuc motor A0- | Yokogawa transmitter EJA- |
