Motors | Energy | Automation | Coatings
Weg 14,000kw, 4 Pole, 45 Tonne Slipring Motor
Supplied To Test Huge Compressors At MAN
Turbo AG In Oberhausen
Weg 14,000kw, 4 Pole,
45 Tonne Slipring Motor
Supplied To Test Huge
Compressors At Man
Turbo AG In Oberhausen
WEG Germany GmbH has supplied a
supply credentials to the Oberhausen-
45-tonne, 14,000kW, 10,000V high voltage
based company, and this resulted in a
slipring motor for the testing of huge radial,
climate of trust being established with
axial, and geared compressors at MAN
technical personnel from WEG Germany.
Turbo AG’s Oberhausen plant.
In addition, key personnel from MAN Turbo
also visited the test bed facility of Sulzer
Designed and manufactured by WEG to
Pumps, in Leeds in the UK, - where WEG
exacting customer specifications, the ‘M’-
had supplied a similar but lower power
Line slip ring motor is special due to its
slipring motor - and talked with the test
highly robust design, which enables it to
field managers there to determine their
withstand the rigours of movement around
experiences with the WEG motor.
the test area, by cranes and lifting tools,
and yet still provide reliable operation under
In addition to the facility for the year long
severe test conditions. In addition, the
test programme, and the favourable
motor has two conical shafts, allowing the
outcome from the Sulzer visit, the third
connection of steam turbines or expanders
determining factor in MAN Turbo’s decision
to the second shaft end, raising its
to specify a WEG slipring motor was that
mechanical transfer rating to 20,000 KW.
WEG is one of only three companies
worldwide with the know- how to design
Initially, MAN Turbo AG was reluctant to
a special machine that would satisfy MAN
place such a strategically important order
Turbo AG’s exacting specification.
for a test motor with a company it knew
little about. However WEG was able to
demonstrate its global manufacturing and
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The largest motor ever built by WEG is a
slipring machine; it is used in a wind tunnel
for testing aircraft at high MACH numbers.
This motor, a 27,000kW, 12-pole, 11kV
machine, is 7-metres long by 5-metres
wide and weighs over 93 tonnes. The
increased power required for its operation
meant that it needed its own 132kV grid
connection. However, WEG was able to
provide a total solution based around
this requirement, by supplying a 35MVA
11kV/132 kV transformer with auto-tap
changer, allowing the client to reduce his
total installation costs substantially.
The MAN Turbo motor is also substantial;
a force- cooled unit, rated S1-100%
14,000 KW at F/F rise, from 1500rpm
down to 750 rpm, it weighs in at 45tonnes. Motors of this size are usually fixed
and operate continuously under normal
conditions. However, this is not the case
with the MAN Turbo motor; the 45-tonne
machine has to undergo the rigours of
being moved around by cranes and lifting
tools, and still performs reliably in the
severe and exacting conditions naturally
existing in field testing.
A slipring motor was specified by MAN
Turbo AG, because the company has
experience of this motor type - albeit in
the lower power ranges - and has enjoyed
satisfactory results with them over many
years. Slipring motors are actually ideal for
MAN Turbo AG’s test purposes, as they
do not suffer from any torque pulsations in
their drive train.
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“Our appointment as a key electrical supplier to MAN Turbo
AG is testament both to the quality of our equipment and
to the technical expertise of our personnel. Germany is the
largest market for electrical equipment suppliers in Europe,
and to achieve the breakthrough that we have against
strong competition is a terrific achievement for WEG.”
The unusual specification of the MAN Turbo
Following WEG’s delivery of the slip ring
slip ring motor is testament to the modular
motor, MAN Turbo commenced its year
nature of WEG’s ‘M’-Line of high voltage
long in-house testing programme, to
motors. The flexible ‘M’ range design
determine that the motor performance met
enables the motor specification to be tightly and exceeded all its requirements. The
tailored to specific customer specifications.
testing procedure was entirely successful,
The MAN Turbo motor is designed with
resulting in further purchases of WEG
two conical shaft ends, to facilitate tests
equipment – motors and generators.
in excess of the normal capacity of the
This association culminated in November
motor. In these tests, the second of the
2008, when WEG Germany GmbH signed
conical shafts is attached to a turbine or
a framework agreement with MAN Turbo
an additional motor to deliver the additional
AG, making WEG one of the company’s
power, raising the mechanical transfer
key electrical suppliers. Included in this
rating of this motor to 20,000kW.
agreement are MAN Turbo AG’s production
sites at Oberhausen, Berlin, Hamburg,
Speed control of the motor is carried out
Zürich and Schio.
by a liquid rheostat. This unit has two
tanks for part and full load testing. The
Commenting upon this achievement
speed range is 0 to 1500 rpm; with normal
Andreas Schulte Mesum, General Manager
operating in the 50% to 100% range, or
Energy Business of WEG Germany GmbH
750rpm to 1500 rpm. Within this speed
said: “Our appointment as a key electrical
range the motor operates with constant
supplier to MAN Turbo AG is testament
torque. The option of a variable speed
both to the quality of our equipment and
drive was considered, but discounted,
to the technical expertise of our personnel.
as the investment was much higher, and
Germany is the largest market for electrical
the possibility of encountering torque
equipment suppliers in Europe, and to
problems, which can wreck compressor
achieve the breakthrough that we have
blades, was also greater.
against strong competition is a terrific
achievement for WEG.”
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