1.
Linear motor
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A linear motor is an electric motor that has had its stator and rotor unrolled so that instead of producing a torque it produces a linear force along its length. However, linear motors are not necessarily straight, characteristically, a linear motors active section has ends, whereas more conventional motors are arranged as a continuous loop. The most common mode of operation is as a Lorentz-type actuator, in which the force is linearly proportional to the current. Many designs have been put forward for linear motors, falling into two categories, low-acceleration and high-acceleration linear motors. Low-acceleration linear motors are suitable for trains and other ground-based transportation applications. High-acceleration linear motors are normally rather short, and are designed to accelerate an object to a high speed. High-acceleration linear motors are used in studies of hypervelocity collisions, as weapons. They are usually of the AC linear induction motor design with an active three-phase winding on one side of the air-gap, however, the direct current homopolar linear motor railgun is another high acceleration linear motor design. These magnets can be permanent magnets or energized magnets, the Shanghai Transrapid motor is an LSM. In this design the rate of movement of the field is controlled, usually electronically. For cost reasons synchronous linear motors rarely use commutators, so the rotor often contains permanent magnets, examples include coilguns and the motors used on some maglev systems, as well as many other linear motors. In this design, the force is produced by a moving magnetic field acting on conductors in the field. The two opposing fields will repel each other, thus creating motion as the magnetic field sweeps through the metal, in this design a large current is passed through a metal sabot across sliding contacts that are fed from two rails. The magnetic field this generates causes the metal to be projected along the rails, piezoelectric drive is often used to drive small linear motors. A feasible linear induction motor is described in the U. S, patent 782,312, for driving trains or lifts. The German engineer Hermann Kemper built a model in 1935. In the late 1940s, Dr. Eric Laithwaite of Manchester University, in a single sided version the magnetic repulsion forces the conductor away from the stator, levitating it, and carrying it along in the direction of the moving magnetic field. He called the later versions of it magnetic river, because of these properties, linear motors are often used in maglev propulsion, as in the Japanese Linimo magnetic levitation train line near Nagoya
2.
Induction motor
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An induction motor can therefore be made without electrical connections to the rotor. An induction motors rotor can be either wound type or squirrel-cage type, three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans, although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump, squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive applications. Tesla applied for U. S. patents in October and November 1887 and was granted some of these patents in May 1888, in April 1888, the Royal Academy of Science of Turin published Ferrariss research on his AC polyphase motor detailing the foundations of motor operation. George Westinghouse, who was developing an alternating current power system at time, licensed Tesla’s patents in 1888. Tesla was also employed for one year as a consultant, Westinghouse employee C. F. Scott was assigned to assist Tesla and later took over development of the induction motor at Westinghouse. Steadfast in his promotion of development, Mikhail Dolivo-Dobrovolsky invented the cage-rotor induction motor in 1889. Furthermore, he claimed that Teslas motor was not practical because of two-phase pulsations, G. Lamme developed a rotating bar winding rotor. The General Electric Company began developing three-phase induction motors in 1891, by 1896, General Electric and Westinghouse signed a cross-licensing agreement for the bar-winding-rotor design, later called the squirrel-cage rotor. Arthur E. Kennelly was the first to bring out full significance of the i to designate the 90-degree rotation operator in complex number analysis of AC problems. GEs Charles Proteus Steinmetz greatly developed application of AC complex quantities including in terms now commonly known as the induction motors Steinmetz equivalent circuit. Induction motor improvements flowing from these inventions and innovations were such that a 100-horsepower induction motor currently has the same mounting dimensions as a 7. 5-horsepower motor in 1897. In both induction and synchronous motors, the AC power supplied to the motors stator creates a field that rotates in time with the AC oscillations. Whereas a synchronous motors rotor turns at the rate as the stator field. The induction motor stators magnetic field is changing or rotating relative to the rotor. This induces a current in the induction motors rotor, in effect the motors secondary winding. The rotating magnetic flux induces currents in the windings of the rotor, the currents in the rotor windings in turn create magnetic fields in the rotor that react against the stator field
3.
Magnetic levitation
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Magnetic levitation, maglev, or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields. Magnetic force is used to counteract the effects of the gravitational acceleration, Magnetic levitation is used for maglev trains, contactless melting, magnetic bearings and for product display purposes. Magnetic materials and systems are able to attract or press each other apart or together with a dependent on the magnetic field. To calculate the amount of lift, a pressure can be defined. Earnshaws theorem proves that using only paramagnetic materials it is impossible for a system to stably levitate against gravity. However, servomechanisms, the use of materials, superconduction. In some cases the force is provided by magnetic levitation. Static stability means that any small displacement away from a stable equilibrium causes a net force to push it back to the equilibrium point, Earnshaws theorem proved conclusively that it is not possible to levitate stably using only static, macroscopic, paramagnetic fields. Conductors can have a relative permeability to alternating magnetic fields of below one, dynamic stability occurs when the levitation system is able to damp out any vibration-like motion that may occur. Magnetic fields are conservative forces and therefore in principle have no built-in damping and this can permit vibration modes to exist that can cause the item to leave the stable region. Damping of motion is done in a number of ways, external mechanical damping, such as dashpots, from Earnshaws theorem at least one stable axis must be present for the system to levitate successfully, but the other axes can be stabilized using ferromagnetism. The primary ones used in maglev trains are servo-stabilized electromagnetic suspension, with a small amount of mechanical constraint for stability, achieving pseudo-levitation is a relatively straightforward process. If two magnets are mechanically constrained along an axis, for example, and arranged to repel each other strongly. Another geometry is where the magnets are attracted, but constrained from touching by a tensile member, another example is the Zippe-type centrifuge where a cylinder is suspended under an attractive magnet, and stabilized by a needle bearing from below. The attraction from a fixed strength magnet decreases with increased distance, for a stable system, the opposite is needed, variations from a stable position should push it back to the target position. Either system represents examples of ElectroMagnetic Suspension, for a very simple example, some tabletop levitation demonstrations use this principle, and the object cuts a beam of light or Hall effect sensor method is used to measure the position of the object. The electromagnet is above the object being levitated, the electromagnet is turned off whenever the object gets too close, such a simple system is not very robust, far more effective control systems exist, but this illustrates the basic idea. EMS magnetic levitation trains are based on this kind of levitation, The train wraps around the track, the servo controls keep it safely at a constant distance from the track
4.
Charles Wheatstone
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Charles Wheatstone was born in Barnwood, Gloucester. His father was a music-seller in the town, who moved to 128 Pall Mall, London, four years later, Charles, the second son, went to a village school, near Gloucester, and afterwards to several institutions in London. One of them was in Kennington, and kept by a Mrs. Castlemaine, from another he ran away, but was captured at Windsor, not far from the theatre of his practical telegraph. As a boy he was shy and sensitive, liking well to retire into an attic. His father encouraged him in this, and finally took him out of the uncles charge. At the age of fifteen, Wheatstone translated French poetry, some lines of his on the lyre became the motto of an engraving by Bartolozzi. Small for his age, but with a fine brow, and intelligent blue eyes, he visited an old book-stall in the vicinity of Pall Mall. Most of his pocket-money was spent in purchasing the books which had taken his fancy, whether fairy tales, history, or science. One day, to the surprise of the bookseller, he coveted a volume on the discoveries of Volta in electricity and it was written in French, and so he was obliged to save again, until he could buy a dictionary. Then he began to read the volume, and, with the help of his brother, William, to repeat the experiments described in it, with a home-made battery. In constructing the battery, the boy philosophers ran short of money to procure the requisite copper-plates and they had only a few copper coins left. A happy thought occurred to Charles, who was the spirit in these researches, We must use the pennies themselves, said he. At Christchurch, Marylebone, on 12 February 1847, Wheatstone was married to Emma West and she was the daughter of a Taunton tradesman, and of handsome appearance. She died in 1866, leaving a family of five children to his care. His domestic life was quiet and uneventful, Sir Henry Taylor tells us that he once observed Wheatstone at an evening party in Oxford earnestly holding forth to Lord Palmerston on the capabilities of his telegraph. I must get you to tell that to the Lord Chancellor, and so saying, he fastened the electrician on Lord Westbury, and effected his escape. Wheatstone was knighted in 1868, after his completion of the automatic telegraph and he had previously been made a Chevalier of the Legion of Honour. Some thirty-four distinctions and diplomas of home or foreign societies bore witness to his scientific reputation, the same year he was awarded the Ampere Medal by the French Society for the Encouragement of National Industry
5.
King's College London
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Kings College London is a public research university located in London, United Kingdom, and a founding constituent college of the federal University of London. Kings was established in 1829 by King George IV and the Duke of Wellington, in 1836, Kings became one of the two founding colleges of the University of London. It is a member of organisations such as the Association of Commonwealth Universities, the European University Association. Kings has five campuses, its main campus on the Strand in central London. In 2015/16, Kings had an income of £738.4 million, of which £193.2 million was from research grants and contracts and as of 2014/15. It has the fifth largest endowment of any university in the United Kingdom, and its academic activities are organised into nine faculties which are subdivided into numerous departments, centres and research divisions. Kings is home to six Medical Research Council centres and is a member of the Kings Health Partners academic health sciences centre, Francis Crick Institute. Kings College London, so named to indicate the patronage of King George IV, was founded in 1829 in response to the controversy surrounding the founding of London University in 1826. The need for such an institution was a result of the religious and social nature of the universities of Oxford and Cambridge, which then educated solely the sons of wealthy Anglicans. The secular nature of London University was disapproved by The Establishment, indeed, thus, the creation of a rival institution represented a Tory response to reassert the educational values of The Establishment. Winchilsea and about 150 other contributors withdrew their support of Kings College London in response to Wellingtons support of Catholic emancipation. In a letter to Wellington he accused the Duke to have in mind insidious designs for the infringement of our liberty, the letter provoked a furious exchange of correspondence and Wellington accused Winchilsea of imputing him with disgraceful and criminal motives in setting up Kings College London. The result was a duel in Battersea Fields on 21 March 1829, Winchilsea did not fire, a plan he and his second almost certainly decided upon before the duel, Wellington took aim and fired wide to the right. Accounts differ as to whether Wellington missed on purpose, Wellington, noted for his poor aim, claimed he did, other reports more sympathetic to Winchilsea claimed he had aimed to kill. Honour was saved and Winchilsea wrote Wellington an apology, duel Day is still celebrated on the first Thursday after 21 March every year, marked by various events throughout Kings, including reenactments. Kings opened in October 1831 with the cleric William Otter appointed as first principal, despite the attempts to make Kings Anglican-only, the initial prospectus permitted, nonconformists of all sorts to enter the college freely. William Howley, the governors and the professors, except the linguists, had to be members of the Church of England but the students did not, though attendance at chapel was compulsory. Kings was divided into a department and a junior department, also known as Kings College School
6.
Imperial College London
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Imperial College London is a public research university located in London, United Kingdom. Its founder, Prince Albert, envisioned an area comprised of the Victoria and Albert Museum, Natural History Museum, Royal Albert Hall, the Imperial Institute was opened by his wife, Queen Victoria, who laid the foundation stone in 1888. Imperial College London was granted a charter in 1907. In the same year, the joined the University of London. The curriculum was expanded to include medicine after merging with several medical schools. In 2004, Queen Elizabeth II opened the Imperial College Business School, Imperial is organized through faculties for Science, Engineering, Medicine, and Business. The main campus is located in South Kensington, the universitys emphasis is on emerging technology and its practical application. Imperials contributions to society include the discovery of penicillin, the development of fibre optics, Imperial is consistently ranked among the top universities in the world. In 2017, it ranked 8th in the Times Higher Education World University Rankings, 9th in the QS World University Rankings, in 2015, Imperial was also ranked the most innovative university in Europe, and in 2017 as the 5th most international university in the world. Staff and alumni include 15 Nobel laureates,2 Fields Medalists,70 Fellows of the Royal Society,82 Fellows of the Royal Academy of Engineering, and 78 Fellows of the Academy of Medical Sciences. The Great Exhibition in 1851 was organised by Prince Albert, Henry Cole, Francis Fuller and other members of the Royal Society for the Encouragement of Arts, Manufactures and Commerce. The Great Exhibition made a surplus of £186,000 used in creating an area in the South of Kensington encouraging culture and education for everyone. Its founder, Prince Albert, envisioned an area composed of the Victoria and Albert Museum, Natural History Museum, Royal Albert Hall. Several royal colleges and the Imperial Institute merged to form what is now Imperial College London, as a result of a movement earlier in the decade, many politicians donated funds to establish the college, including Benjamin Disraeli, William Gladstone and Robert Peel. It was also supported by Prince Albert, who persuaded August Wilhelm von Hofmann to be the first professor, William Henry Perkin studied and worked at the college under von Hofmann, but resigned his position after discovering the first synthetic dye, mauveine, in 1856. It is considered the highest honour given in the chemical industry. The Royal School of Mines was established by Sir Henry de la Beche in 1851, developing from the Museum of Economic Geology and he created a school which laid the foundations for the teaching of science in the country, and which has its legacy today at Imperial. The Royal College of Science was established in 1881, the main objective was to support the training of science teachers and to develop teaching in other science subjects alongside the Royal School of Mines earth sciences specialities
7.
London
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London /ˈlʌndən/ is the capital and most populous city of England and the United Kingdom. Standing on the River Thames in the south east of the island of Great Britain and it was founded by the Romans, who named it Londinium. Londons ancient core, the City of London, largely retains its 1. 12-square-mile medieval boundaries. London is a global city in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism. It is crowned as the worlds largest financial centre and has the fifth- or sixth-largest metropolitan area GDP in the world, London is a world cultural capital. It is the worlds most-visited city as measured by international arrivals and has the worlds largest city airport system measured by passenger traffic, London is the worlds leading investment destination, hosting more international retailers and ultra high-net-worth individuals than any other city. Londons universities form the largest concentration of education institutes in Europe. In 2012, London became the first city to have hosted the modern Summer Olympic Games three times, London has a diverse range of people and cultures, and more than 300 languages are spoken in the region. Its estimated mid-2015 municipal population was 8,673,713, the largest of any city in the European Union, Londons urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants at the 2011 census. The citys metropolitan area is the most populous in the EU with 13,879,757 inhabitants, the city-region therefore has a similar land area and population to that of the New York metropolitan area. London was the worlds most populous city from around 1831 to 1925, Other famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Pauls Cathedral, Tower Bridge, Trafalgar Square, and The Shard. The London Underground is the oldest underground railway network in the world, the etymology of London is uncertain. It is an ancient name, found in sources from the 2nd century and it is recorded c.121 as Londinium, which points to Romano-British origin, and hand-written Roman tablets recovered in the city originating from AD 65/70-80 include the word Londinio. The earliest attempted explanation, now disregarded, is attributed to Geoffrey of Monmouth in Historia Regum Britanniae and this had it that the name originated from a supposed King Lud, who had allegedly taken over the city and named it Kaerlud. From 1898, it was accepted that the name was of Celtic origin and meant place belonging to a man called *Londinos. The ultimate difficulty lies in reconciling the Latin form Londinium with the modern Welsh Llundain, which should demand a form *lōndinion, from earlier *loundiniom. The possibility cannot be ruled out that the Welsh name was borrowed back in from English at a later date, and thus cannot be used as a basis from which to reconstruct the original name. Until 1889, the name London officially applied only to the City of London, two recent discoveries indicate probable very early settlements near the Thames in the London area
8.
Electromagnetic induction
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Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor due to its dynamic interaction with a magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, Lenzs law describes the direction of the induced field. Faradays law was later generalized to become the Maxwell-Faraday equation, one of the four Maxwells equations in James Clerk Maxwells theory of electromagnetism, electromagnetic induction has found many applications in technology, including electrical components such as inductors and transformers, and devices such as electric motors and generators. Electromagnetic induction was first discovered by Michael Faraday, who made his discovery public in 1831 and it was discovered independently by Joseph Henry in 1832. In Faradays first experimental demonstration, he wrapped two wires around opposite sides of a ring or torus. He plugged one wire into a galvanometer, and watched it as he connected the wire to a battery. He saw a transient current, which he called a wave of electricity and this induction was due to the change in magnetic flux that occurred when the battery was connected and disconnected. Within two months, Faraday found several other manifestations of electromagnetic induction, Faraday explained electromagnetic induction using a concept he called lines of force. However, scientists at the time widely rejected his theoretical ideas, an exception was James Clerk Maxwell, who used Faradays ideas as the basis of his quantitative electromagnetic theory. Heavisides version is the form recognized today in the group of known as Maxwells equations. In 1834 Heinrich Lenz formulated the law named after him to describe the flux through the circuit, Lenzs law gives the direction of the induced EMF and current resulting from electromagnetic induction. Faradays law of induction makes use of the magnetic flux ΦB through a region of space enclosed by a wire loop. The magnetic flux is defined by an integral, Φ B = ∫ Σ B ⋅ d A. The dot product B·dA corresponds to an amount of magnetic flux. In more visual terms, the flux through the wire loop is proportional to the number of magnetic flux lines that pass through the loop. When the flux through the changes, Faradays law of induction says that the wire loop acquires an electromotive force. The direction of the force is given by Lenzs law which states that an induced current will flow in the direction that will oppose the change which produced it. This is due to the sign in the previous equation
9.
Control system
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A control system manages, commands, directs or regulates the behaviour of other devices or systems. It can range from a home heating using a thermostat controlling a domestic boiler to large Industrial control systems which are used for controlling processes or machines. In the most common form, the control system it is desired to control a process, called the plant, so its output follows a control signal. The control system compares the output of the plant to the control signal, an automatic sequential control system may trigger a series of mechanical actuators in the correct sequence to perform a task. For example, various electric and pneumatic transducers may fold and glue a cardboard box, fill it with product, programmable logic controllers are used in many cases such as this, but several alternative technologies exist. An example of this may increase the supply to a furnace when a measured temperature drops. PID controllers are common and effective in such as this. Control systems that include some sensing of the results they are trying to achieve are making use of feedback and so can, to some extent, open-loop control systems do not make use of feedback, and run only in pre-arranged ways. There are two classes of control systems, open loop control systems, and closed loop control systems. In an open loop system, the control action from the controller is independent of the process output. A good example of this is a central heating boiler controlled only by a timer, so heat is applied for a constant time. In a closed loop system, the control action from the controller is dependent on the desired. A closed loop controller therefore has a loop which ensures the controller exerts a control action to give a process output the same as the Reference input or set point. For this reason, closed loop controllers are also called feedback controllers, logic control systems for industrial and commercial machinery were historically implemented at mains voltage using interconnected relays, designed using ladder logic. Today, most such systems are constructed with programmable logic controllers or microcontrollers, the notation of ladder logic is still in use as a programming idiom for PLCs. Logic controllers may respond to switches, light sensors, pressure switches, etc. and can cause the machinery to start, logic systems are used to sequence mechanical operations in many applications. PLC software can be written in different ways – ladder diagrams. Examples include elevators, washing machines and other systems with interrelated stop-go operations, logic systems are quite easy to design, and can handle very complex operations
10.
Maglev
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Maglev is a transport method that uses magnetic levitation to move vehicles without making contact with the ground. With maglev, a vehicle travels along a guideway using magnets to create lift and propulsion, thereby reducing friction by a great extent and allowing very high speeds. In itself, maglev technology includes no moving parts, Maglev trains move more smoothly and more quietly than wheeled mass transit systems. The power needed for levitation is not a large percentage of its overall energy consumption, most goes to overcome drag. Maglev trains hold the record for trains. Compared to conventional trains, differences in construction affect the economics of maglev trains, for high-speed trains with wheels, wear and tear from friction from wheels on rails accelerates equipment wear and prevents high speeds. Conversely, maglev systems have much more expensive to construct. Despite decades of research and development, maglev systems are in operation in just three countries. In April 2004, Shanghais Transrapid system began commercial operations, in March 2005, Japan began operation of its relatively low-speed HSST Linimo line in time for the 2005 World Expo. In its first three months, the Linimo line carried over 10 million passengers, South Korea became the worlds fourth country to succeed in implementing maglev technology with the Incheon Airport Maglev beginning regular operation on February 3,2016. In Japan a new high speed line, the Chuo Shinkansen is planned to become operational in 2027. In the late 1940s, the British electrical engineer Eric Laithwaite and he became professor of heavy electrical engineering at Imperial College in 1964, where he continued his successful development of the linear motor. Since linear motors do not require physical contact between the vehicle and guideway, they became a fixture on advanced transportation systems in the 1960s and 70s. Laithwaite joined one such project, the hovercraft, although the project was cancelled in 1973. The linear motor was naturally suited to use with maglev systems as well, working at the British Rail Research Division in Derby, along with teams at several civil engineering firms, the transverse-flux system was developed into a working system. The first commercial maglev people mover was simply called MAGLEV and officially opened in 1984 near Birmingham and it operated on an elevated 600-metre section of monorail track between Birmingham Airport and Birmingham International railway station, running at speeds up to 42 km/h. The system was closed in 1995 due to reliability problems, High-speed transportation patents were granted to various inventors throughout the world. Early United States patents for a linear motor propelled train were awarded to German inventor Alfred Zehden, in 1907, another early electromagnetic transportation system was developed by F. S. Smith
11.
Tokyo
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Tokyo, officially Tokyo Metropolis, is the capital of Japan and one of its 47 prefectures. The Greater Tokyo Area is the most populous area in the world. It is the seat of the Emperor of Japan and the Japanese government, Tokyo is in the Kantō region on the southeastern side of the main island Honshu and includes the Izu Islands and Ogasawara Islands. Formerly known as Edo, it has been the de facto seat of government since 1603 when Shogun Tokugawa Ieyasu made the city his headquarters. It officially became the capital after Emperor Meiji moved his seat to the city from the old capital of Kyoto in 1868, Tokyo Metropolis was formed in 1943 from the merger of the former Tokyo Prefecture and the city of Tokyo. The Tokyo metropolitan government administers the 23 Special Wards of Tokyo, the metropolitan government also administers 39 municipalities in the western part of the prefecture and the two outlying island chains. The population of the wards is over 9 million people. The prefecture is part of the worlds most populous metropolitan area with upwards of 37.8 million people, the city hosts 51 of the Fortune Global 500 companies, the highest number of any city in the world. Tokyo ranked third in the International Financial Centres Development IndexEdit, the city is also home to various television networks such as Fuji TV, Tokyo MX, TV Tokyo, TV Asahi, Nippon Television, NHK and the Tokyo Broadcasting System. Tokyo ranked first in the Global Economic Power Index and fourth in the Global Cities Index. The city is considered a world city – as listed by the GaWCs 2008 inventory – and in 2014. In 2015, Tokyo was named the Most Liveable City in the world by the magazine Monocle, the Michelin Guide has awarded Tokyo by far the most Michelin stars of any city in the world. Tokyo ranked first in the world in the Safe Cities Index, the 2016 edition of QS Best Student Cities ranked Tokyo as the 3rd-best city in the world to be a university student. Tokyo hosted the 1964 Summer Olympics, the 1979 G-7 summit, the 1986 G-7 summit, and the 1993 G-7 summit, and will host the 2020 Summer Olympics, Tokyo was originally known as Edo, which means estuary. During the early Meiji period, the city was also called Tōkei, some surviving official English documents use the spelling Tokei. However, this pronunciation is now obsolete, the name Tokyo was first suggested in 1813 in the book Kondō Hisaku, written by Satō Nobuhiro. When Ōkubo Toshimichi proposed the renaming to the government during the Meiji Restoration, according to Oda Kanshi, Tokyo was originally a small fishing village named Edo, in what was formerly part of the old Musashi Province. Edo was first fortified by the Edo clan, in the twelfth century
12.
Bombardier Transportation
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Bombardier Transportation is the rail equipment division of the Canadian firm Bombardier Inc. Bombardier Transportation is one of the worlds largest companies in the rail vehicle, the division is headquartered in Berlin, Germany, and has regional offices and major development facilities in Canada and the United States. Bombardier Transportation has many production and development facilities worldwide. Bombardier Transportation produces a range of products including passenger rail vehicles, locomotives, bogies, propulsion and controls. Laurent Troger is the president and chief operating officer of Bombardier Transportation, in January 2011, the company had 34,900 employees,25,400 of them in Europe, and 60 manufacturing locations around the world. Bombardier Transportations first order for mass transit rolling stock was in 1974 for the Société de transport de Montréal to build trains for the Montreal Metro. The core of the Transportation group was formed with the purchase of Montreal Locomotive Works in 1975, with that purchase, Bombardier acquired MLWs LRC tilting train design which it produced in the 1980s. The group also purchased Urban Transportation Development Corporation from the Government of Ontario, MLW was sold to General Electric in 1988. GE ended railcar operations in Canada in 1993, Bombardier Transportation continues to operate the railcar operations in Thunder Bay. In 1987, Bombardier bought the assets of US railcar manufacturers Budd, in 1990, Procor Engineering Ltd. of Horbury near Wakefield, UK, a manufacturer of bodyshells, was acquired, and renamed Bombardier Prorail. In 1991, the grouping Bombardier Eurorail was formed consisting of the companys European subsidiaries, BN, ANF-Industrie, Prorail, in 1992, the company acquired Mexicos largest railway rolling-stock manufacturer, Concarril, from the Mexican government. In 1995, Waggonfabrik Talbot KG in Aachen, Germany, and in 1998, Deutsche Waggonbau AG, DWA encompassed the major portion of the railway equipment industry of the former East Germany, and had its principal sites in Bautzen and Görlitz. In 2001, Bombardier Transportation acquired Adtranz from DaimlerChrysler, and became by many measurements the Western worlds largest rail-equipment manufacturer, the addition of ADtranz made Bombardier a manufacturer of locomotives along with its existing product lines of passenger carriages, multiple-unit trains, and trams. With the acquisition of ADtranz, Bombardier also gained competence in the propulsion components business. Other sites had their work reduced in scope, or were closed. In Sep 2014 the downsizing and eventual closure of the Maryborough factory was announced, in January 2015, the government of Hungary nationalised the loss-making and under-utilised Bombardier carriage works at Dunakeszi, acquiring a 64. 9% stake for $7.8 million. An IPO was planned for late 2015, the investment initially representing a 30% stake - a valuation of $5 billion. The sale was required in part to continue the financing of the parent companys C-Series jet, in Aug 2016 Bombardier opened a 6,000 square metres production facility in Isando, Johannesburg, South Africa
