Usually, alternator is used in many fields, such as lifting equipment, industrial equipment, and electrical equipment, etc. Alternators are also divided into many brands. Famous one is Siemens, and Stamford. In this article, we mainly talks about Shanghai Marathon alternator.
Shanghai Marathon innovative
Electric Co.,Ltd.introduces the design and manufacturing process technology of
the Marathon Electric U.S.A so as to produce x the international advanced level
of single/three-phase brush-less ac generator, with the generator voltage
ranging from 110v to 110v and the capacity ranging from 5 kw to 3000 kw.The
products are widely used in ordinary power supply, emergency power and special
power supply, and they act as the main power supply or emergency power supply
in railway, mining, hospital, house property, military industry,ships, reefer
container, telecommunications, port machinery and key national projects.
MP series 500 frame three-phase
brushless ac synchronous generator is a new type of brushless generator newly
developed, modified and designed on the basis of MAGNAPLUS drawings provided by
Marathon Electric U.S.A.
The MP series 500 frame generator
and the diesel engine can be combined into the fixed or mobile power supply
that is suitable for various occasions and can also be used as emergency power
supply. MP series generators have unique design, advanced structure, good
performance, reliable running and easy operation, which are suitable for
various applications and climate conditions and also stand for the current
advanced international level.
Excellent electrical performance
1. Steady-state voltage
regulation rate ≤ 1%
2, Transient-state regulating
rate + 20% 15% Un (60%In.cosφ≤0. 0.4 lag)
3. voltage regulating range＞±10%Unz
4, sine distortion rate of line
voltage waveform < 5%
5. Thermal deviation of zero
(minimal)
Unique structure design
1. The generator is in a whole
protection structure, and the internal ventilation and cooling structure is
unique. Aluminum alloy fan brings in high ventilation rate and low temperature
rise.
2. The brushless excitation mode
is equipped with solid state voltage regulator.The voltage regulator comes with
functions of low speed protection, electromagnetic interference suppression and
excitation shut off, and it’s also configured with stability adjustment and
voltage amplitude adjustment.
3. The whole salient pole rotor
structure, amortisseur winding and rotor core are connected together. The field
winding adopts the thermosetting epoxy filler, with high mechanical and
electrical strength.
4. The rotating rectifier is
located in the lateral side of the exciter rotor, which is easy for
maintenance.
5. Out of the box and spacious,
can be mounted inside a variety of devices.Out of the box located above the
back of the stand, compact and beautiful.
6. Insulation class is Class H.
7. Parallel operation module and
additional devices can be provided as per the customer requirements.
8. The generator are divided into
two structures: single bearing and double bearing.The single bearing one comes
with a interface of international standard and a coupling piece, which can fit
with all kinds of imported oil engine; double bearing adapts to the matching of
all kinds of domestic diesel engines, and various sizes of flange seam
allowance can be set up according to the demand of customers.
9. According to customer needs,
PMG can be additionally added and DVR2000E digital voltage regulator can be
used.
10. According to customer needs,
condensation heating tube and the thermal protection components can be
additionally added.
Working Conditions
Air temperature is less than:40℃
Altitude does not exceed:1000
meters
If the working conditions do not
meet above environment, the power output quota must be corrected by the
regulation.
Voltage, frequency, speed, power
factor and working mode
Rated voltage:400 v, 480 v, 60
hz)
Rated frequency:50 hz or 60 hz
Rated speed:1500 revolutions per
minute or 1800 revolutions per minute
Power factor:0.8 lag
Work style: continuous (S1)
According to customer needs, they
can be made into products with different output voltage or other special
requirements.
Parallel operation
MP generator can all be
continuous and in parallel operation. In order to ensure the operating
stability of generators, full damping windings are equipped on the rotors.
in parallel operation of
generators, the distribution with power load is implemented by the speed
regulators of the diesel engines, and the distribution without power load is
implemented by the voltage regulator of the generators.
While the generators equipped
with SE350 are in parallel operation, there must be APM2000 parallel modules
and 5VA current transformers, and voltage sag or cross flow compensation is
used to guarantee the balance of the distribution without power load between
parallel generators.
The generators equipped with PMG
and DVR2000E voltage regulator only need to provide 5 va current transformer
signal to voltage regulators, because the DVR voltage regulators contain the
function of parallel operation.
Resistance to electromagnetic
interference
The generators equipped with
SE350 voltage regulators belong to the regular grade, but the generators
equipped with DVR2000E digital voltage regulator are in accordance with grade
MiL-461c.
Bearing
The bearings used by MP generator
are double dust-proof rolling ball bearing, with one-time lubrication by
special high performance grease. Under normal use, B10≥ 20000 hours.
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