New Servopack YASKAWA Japan Electric 4.4KW 200-230vac 5.9hp
SGDB-44ADG-P
Quick Details
SGDB-44ADG-P
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
The SGDB Sigma Series Servopacks are Amplifiers for the Sigma
Series of AC Servos. Designed for applications requiring
multi-drives, the SGDB can be used for speed control, torque
control, and position control. A digital operator can be used to
set parameters for a Servopack.
Yaskawa SGDB Sigma Series AC Servopacks
Features
230VAC Three-Phase Input Power
Accepts an Analog Voltage Speed Reference
Three Internally Set Speeds
Compact Design
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Along with showing direction, the Xux plots also convey information
about the intensity of the magnetic Weld. To achieve this, we
introduce the idea that between every pair of Xux lines (and for a
given depth into the paper) there is a same ‘quantity’ of magnetic
Xux. Some people have no
diYculty with such a concept, while others Wnd that the notion of
quanti4
Electric Motors and Drives fying something so abstract represents a
serious intellectual challenge. But
whether the approach seems obvious or not, there is no denying of
the practical utility of quantifying the mysterious stuV we call
magnetic Xux, and it leads us next to the very important idea of
magnetic Xux density (B).
When the Xux lines are close together, the ‘tube’ of Xux is
squashed into a smaller space, whereas when the lines are further
apart the same tube of Xux has more breathing space. The Xux
density (B) is simply
the Xux in the ‘tube’ (F) divided by the cross sectional area (A)
of the tube, i.e. B ¼ F A (1:1)
The Xux density is a vector quantity, and is therefore often
written in bold type: its magnitude is given by equation (1.1), and
its direction is that of the prevailing Xux lines at each point.
Near the top of the magnet in Figure 1.2, for example, the Xux
density will be large (because the Xux
is squashed into a small area), and pointing upwards, whereas on
the equator and far out from the body of the magnet the Xux density
will be small and directed downwards.
It will be seen later that in order to create high Xux densities in
motors, the Xux spends most of its life inside well-deWned
‘magnetic circuits’ made of iron or steel, within which the Xux
lines spread out uniformly to
take full advantage of the available area. In the case shown in
Figure 1.3, for example, the cross-sectional area at bb’ is twice
that at aa’, but the Xux is constant so the Xux density at bb’ is
half that at aa’.
An ASD can reduce system maintenance requirements for both the
control and drive train equipment compared to other types of
variable speed control.
C The ASD can reduce the wear on belts, sheaves, gearboxes, and
couplings in a system.
C Control valves can sometimes be a maintenance problem due to
lining wear when throttling a material which is very caustic or
extremely rough in nature.
C All of these are wear items and can add to the overall
maintenance of the process control plant.
C The ASD does not cycle motors on and off, as commonly seen with
certain processes. By eliminating the cycling of these motors, the
variable frequency drive eliminates the amount of in-rush and the
torque pulsations felt throughout the system.
Advantages - Bypass Capability
Many ASD systems make use of a bypass starter in parallel with the
drive which allows the drive
to be easily bypassed when critical applications require a back-up
control means.
C Other types of variable speed control are usually physically
coupled between the motor and the load and must be uncoupled,
repaired, and then re-coupled into the line-up when there is a
failure.
C The ASD can be bypassed in a matter of seconds where other types
of speed control may be down for hours or even weeks, while it is
being repaired if there is not a spare control.
Advantages - Multi-Motor Control Some ASD's can control multiple
motors from the same drive which can be an advantage over other
types of variable speed control devices.
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- |
