Synchron BL Motor Umrichter Digital Eng
Synchron BL Motor Umrichter Digital Eng
Synchron BL Motor Umrichter Digital Eng
Low maintenance
The BL motor system requires
Numerous plants for the the lowest level of maintenance
generation of energy in power in comparison with other
plants and the processing of electrically controlled drives.
chemicals, plastics and rubber And it is even better in
as well as in the distribution of comparison to mechanical,
natural gas both at home and hydraulic or thermodynamic
abroad have been equipped control systems.
with BL motor systems from
AEG. Synchronous motors Universal applications
have also proven successful The BL motor system can be
under the tough conditions designed for virtually any power
encountered in everyday and speed. This System
Operation of test systems and therefore covers many
in the most varied applications applications in many branches
in industry. of industry, above all it can be
used under difficult
BL motor systems can be environmental conditions which
designed and manufactured involve dust, corrosive or
for the many and varied explosive gas, salty air or
customer specifications and radioactivity.
standards applicable today.
Through this level of flexibility
BL motor systems can be
ideally integrated in national
and international plant
projects.
The title page photograph shows two natural gas reciprocating compressors with BL motor System drives, 2,000 kW, 420
rpm, 14-pole, flameproof class EEx-e, 12-pulse converter.
That is the digital form of AEG prospect A52 V2.7.36/0689. AEG Industrial Engineering GmbH Berlin 2006
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1)
Converters for BL motor Systems are instaiied in AEG intermas cubicies with steei panels and are system-tested ex works.
In the left hand cubicle are the two air cooled thyristor bridges of a 6-puise converter for 1,900 kW. The right
hand cubicle contains the drive control, regulation and excitation as well as in this case a comprehensive
set of optional equipment meeting the customers specification. The DC choke is installed separately.
2)
Basic circuit diagram of a 6-pulse BL motor drive system.
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The operation
of the BL motor drive system from AEG
In principle, Operation of a BL motor
System is similar to that of a converter-fed
DC motor drive. In the BL motor System
however the mechanical DC motor
commutator which is subject to wear has
been replaced by an electronic
commutator. This means: The robustness
and freedom from maintenance of the
brushiess excited synchronous motor have
been combined with the optimum control
provided by the converterfed DC motor to
form a new drive System - the BL motor
system.
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4)
Test runs under rated load conditions at high capacities are possible with two drives in so-called back to back operation. The
measurement of the bosses in these two 10 MWBL motor systems showed a level of efficiency of 95.0 % at 4,500 rpm, including
all components for example transformers, converters and the motor.
5)
Depending upon the power of the drive, 12-puls frequency converters can be installed on the mains and motor sides (see figure
above), or on the mains side only (see figure below)
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The concept
of the complete BL motor system
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Characteristics
at the mains network
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and the specific characteristics
of the converter
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11)
This 12-pulse converter with 24 disc thyristors has an air/water cooler with two air circuits in the centre of the cubicle. The
cooling air is drawn through the thyristor module by two cross-flow fans (to the left and right under the hood) and is forced into
the cooler. This advantageous design requires no cooling air supply from the outside. This avoids heat disapation to the
control room, Operation is at a low noise level and the unit is in addition sealed against dust and water to protection class P54.
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The features of powerful
synchronous motors
Modern designed synchronous high power
motors have always formed a part of the AEG
scope of supply. The synchronous motor of
the BL motor system is almost identical to the
synchronous generator used tor electricity
generation. From the construction of
generators we have long been familiar with
the special features of brushless excitation
and have our own product - the AEG
Rotaduct - on the market. Our economical
drive systems have today been produced on
the basis of these years of experience.
Constant further development in our works at
Bremen and Essen guarantee the
acknowledged high technical standing and
reputation of this equipment.
12)
High speed BL motors for boiler feed pumps and turbine compressors have
Every drive System requires a specific 2-pole turbo rotors of forged steel, like power plant generators. The high
technical solution - and AEG can supply it speeds of up to 6,000 rpm and the supply through converters do however
require additional special knowledge for calculation and design. AEG has the
Through a constant exchange of information specialists and experience required for this.
and experience with our customers and their
planning and engineering offices it is possible
for us to match the motors ideally to the
practical requirements. In addition to the
general operating characteristics this
includes, such characteristics as:
Our standard program includes all important All standard motors are provided with Torsional and bending vibration
design aspects required for 1 EC 34-7 as well two bearing design, even the high safely under control
as other international standards VDE, NEMA, speed turbo rotor motors. The bearing Drives with four poles and more run
BS for example. Protection classes from IP on the non-driven side always being below the critical speed. The first
23 to IP 65 as well as the explosion insulated. Larger drives have sliding critical bending speed therefore lies
protection, flamerproof classes Ex(e), Ex(p) bearings which are also available in above rated speed. Two pole high
and Ex(n) with PIB or BASEEFA certificate the lower power ranges at customer speed drives are designed to allow
are available also conventional types of request. The smooth-running continuous running at the first critical
cooling using air and air/water. The windings characteristics according to VDI 2056 bending speed.
are generally constructed with insulation are Good. BL motors produce only little
class F. Depending upon the application, the alternating torque levels. In some
motors can be fitted with cage type cases however lt is recommended
rotors or with salient pole type rotors. that the shaft should be assessed for
A strong damper cage reduces the the critical torson speeds whilst
losses resulting from current including the motor, coupling and
harmonics in the rotor and at the machine. Our specialists solve this
same time reduces the commutation problem by using our own computer
time. factories programmes.
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AEG is your competent partner
for the construction of BL motor systems
14)
The assembly of two speed controlled boiler feed pump drive systems of 10,000 kW each at 4,500 rpm in continuous Operation.
The technical and economic advantages Plastics and rubber processing The operating data: 10,000 kW
of this system have led to it being used in Extruders each, 4,500 rpm in continuous
a wide range of applications for medium Mixers operation or 13,650 kW, 5,000 rpm
and high power ratings. BL motor system Calenders. for 15 minutes (at the so called TV
are already in Operation in almost 50 % point). Faultless Operation since
of the recognized applications stated Natural gas supply 1984 has far exceeded the
below. Others are already at the project Turbo-compressors availability levels expected by the
or planning stage. A large number of Reciprocating compressors. operator. Since then, a 100 % feed
deliveries worldwide form our best pump drive of 15,000 kW, 4,700 rpm
references. Test systems (18,200 kW, 5,100 rpm for 15
Balance and centrifugal test beds minutes) has also been put into
Branches of industry for which Pump and compressortest beds operation for a lot of other power
BL motor systems are of particular supply company.
importance: Marine and offshore technology
Propulsion drives
Electricity generation Shaftmounted generators
Boilerfeed pumps Drives on drilling rigs.
Hot water circulation pumps
Condensate pumps Iron and steel works, coal and ore
Fresh air fans mining
Suction fans Furnace fans In coal fired power stations, boiler
Cooling water pumps Sintering fans feed pumps are amongst the largest
REA pressure raising fans Dust extraction systems auxiliary drives. lf pumps are
Mill fans Rotary kilns frequently operated under partial
Coal mills Grinding systems bad conditions there can be
Hot water pumps for remote heating Conveyor belts. considerable energy saving through
Wind power generators. the use of the BL motor system as a
Further applications speed controlled gearless electric
Chemicals Drinking water pumps drive. The photograph shows two 75
Turbo-compressors Fans of all types. % boiler feed pump drives of a 650
Screw compressors MW power plant during erection
Ammonia reciprocating pumps (Figure 13).
Refiners
Rotary pumps.
Diesel engine test beds
Wind tunnels.
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Some practical examples of high
ratings
15)
One of the largest speed controlled mixer
drives of 3,200 kW at 875 rpm.
16)
BL motor system with V 3 mounting as
a drive for the cooling water circulation
pumps in a nuclear power station
using boiling water cooled reactors.
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Examples for the application
of BL motor System inverter
In high power drives the components of the BL
motor System are designed for medium voltage.
The thyristor power circuit is therefore mounted
either in an open frame (Figure 16) or in
enclosed Intermas cubicles. The 6 kV converter
illustrated here contains water cooled thyristors.
The transfer of signals between the control
cubicle and the thyristor circuit for the control of
the firing pulses and for status feedback is by
Iight, through optical fibres. This standardised
Megasemi module technology from AEG has
also been in use for lot of years in other medium
and high voltage applications. For example in
dynamic reactive power compensators, HVDC
systems and petrochemical electric arc reactors.
18)
3,000 kW converter for accelerating one or more 130 MVA gas turbine
generators as a complete package.
19)
Principle diagram of a starting System for two gas turbine Sets. We delivered this
application more them 350 times The average power has been closed to 5MW
each. Also we used BL system to control speed of large generators in hydro
storage power plants with 20MW
We have been manufacturing BL motor Systems and starting converters for almost three decades. 360 plants have
been supplied to lot of countries. They are operating there every day faultlessly, under severe conditions. You can
trust our references from all over the world. Please ask for our detailed reference list for the BL Motor Systems.
Also we used BL motor system to controlled speed of large generators / motors in hydro power storage power
plants with 25 MW and more to install continues speed / load control of pump / turbine
Our sales engineers would be pleased to assist you with any further details, information or advice you may wish
for. Please contact us
AEG Industrial Engineering GmbH x D14199 Berlin xTel +49 30 820 99 490 x Fax +49 30 820 99 499 x www.aeg-ibo.com
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AEG Berlin
factory for current rectifier products
AEG have been developing, projecting, Characteristics of the systems, plant Products and Services
manufacturing and selling power elec- and components include innovative
tronics plants and components for more technology, high safety and The division program includes:
than 60 years. The new production reliability levels and quality
facility in Berlin with more than 46000 assurance with extremely accurate Converter for drive technology
square metres of production and office quality control and operational Motion control systems
premises, around 1000 employees and testing facilities. Converter for power plant
modern production equipment has been The extensive service provided technology
in service since 1984 to provide the meets the high quality standards of Rectifier for high voltage and
facilities required to consolidate and the products. high current applications.
expand upon the technological lead Construction of controls and
held by the company. During the last 8 workshop Services
years AEGs propriety factory together Wind generation applications
with its highly experienced engineers Converters: 50/60/16 2/3 Hz
and personell was rented and operated The reference list of different power
by several different companies. Today it electronics applications are long These products are being marketed by
is Converteam GmbH a daughter of and not limited. the specialized departments for plant
Barclays Bank construction as part of the total plants
Your Partner
AEG
Industrial Engineering GmbH
Tel.: +49(30)82099490
Fax: +49(30)82099499
E-Mail: aeg@aeg-ibo.com
Web: www.aeg-ibo.com
AEG Industry 0503/01.07
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