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Hans Behn-Eschenburg
Hans Behn-Eschenburg (10 January 1864 – 18 May 1938) was born in Obertrass (now Zurich), Switzerland. His work on the AC single-phase motor was important to the electrification of railways. He studied mathematics and physics in Zurich and Berlin between 1886 and 1890. In 1892, Behn-Eschenburg worked at Maschinenfabrik Oerlikon, where he became chief electrician (1897-1911), director (1911–1913), director General Technical (1913-1928) and Administrative Counselor (1919-1938). Oerlikon was prominent in the construction of single-phase motors with commutators for traction. He died on 18 May 1938 in Küsnacht. His work focussed on alternating current technology, including the asynchronous motor An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor c ... and the AC single-phase motor. wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Behn-Eschenburg
Hans Behn-Eschenburg (10 January 1864 – 18 May 1938) was born in Obertrass (now Zurich), Switzerland. His work on the AC single-phase motor was important to the electrification of railways. He studied mathematics and physics in Zurich and Berlin between 1886 and 1890. In 1892, Behn-Eschenburg worked at Maschinenfabrik Oerlikon, where he became chief electrician (1897-1911), director (1911–1913), director General Technical (1913-1928) and Administrative Counselor (1919-1938). Oerlikon was prominent in the construction of single-phase motors with commutators for traction. He died on 18 May 1938 in Küsnacht. His work focussed on alternating current technology, including the asynchronous motor An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor c ... and the AC single-phase motor. wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universal Motor
The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field. It is a commutated series-wound motor where the stator's field coils are connected in series with the rotor windings through a commutator. It is often referred to as an AC series motor. The universal motor is very similar to a DC series motor in construction, but is modified slightly to allow the motor to operate properly on AC power. This type of electric motor can operate well on AC because the current in both the field coils and the armature (and the resultant magnetic fields) will alternate (reverse polarity) synchronously with the supply. Hence the resulting mechanical force will occur in a consistent direction of rotation, independent of the direction of applied voltage, but determined by the commutator and polarity of the field coils.Herman, Stephen L. ''Delmar's Standard Textbook of Electricity, 3rd Edition.'' Clif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Electrification System
A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply. Electric railways use either electric locomotives (hauling passengers or freight in separate cars), electric multiple units (passenger cars with their own motors) or both. Electricity is typically generated in large and relatively efficient generating stations, transmitted to the railway network and distributed to the trains. Some electric railways have their own dedicated generating stations and transmission lines, but most purchase power from an electric utility. The railway usually provides its own distribution lines, switches, and transformers. Power is supplied to moving trains with a (nearly) continuous conductor running along the track that usually takes one of two forms: an overhead line, suspended from poles or towers along the track or from structure or tunnel ceilings, or a third rail mounted at track level and contacted by a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berlin
Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constituent states, Berlin is surrounded by the State of Brandenburg and contiguous with Potsdam, Brandenburg's capital. Berlin's urban area, which has a population of around 4.5 million, is the second most populous urban area in Germany after the Ruhr. The Berlin-Brandenburg capital region has around 6.2 million inhabitants and is Germany's third-largest metropolitan region after the Rhine-Ruhr and Rhine-Main regions. Berlin straddles the banks of the Spree, which flows into the Havel (a tributary of the Elbe) in the western borough of Spandau. Among the city's main topographical features are the many lakes in the western and southeastern boroughs formed by the Spree, Havel and Dahme, the largest of which is Lake Müggelsee. Due to its l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maschinenfabrik Oerlikon
Maschinenfabrik Oerlikon was a Swiss engineering company based in the Zürich district of Oerlikon known for the early development of electric locomotives. It was founded in 1876 by the industrialist Peter Emil Huber-Werdmüller, and occupied a large site immediately to the west of Oerlikon railway station. In 1906 the armaments business was demerged to form ', which evolved into the technology company OC Oerlikon and the armaments company Rheinmetall Air Defence (formerly ''Oerlikon Contraves''). In 1967 Maschinenfabrik Oerlikon was taken over by Brown, Boveri & Cie, which in 1988 merged with ASEA to form ABB Group. The site of the company's works has been redeveloped, including the innovative public MFO-Park The MFO-Park is a public park in the Oerlikon quarter of the Swiss city of Zürich. The area to the north of Zürich Oerlikon railway station was once home to the extensive works of ''Maschinenfabrik Oerlikon'' (MFO), as site that has now been .... In the seco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traction Motor
A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric vehicle, electric or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles (electric multiple units) and other electric vehicles including electric milk floats, elevators, roller coasters, conveyors, and trolleybuses, as well as vehicles with electrical transmission systems (Diesel locomotive#Transmission types, diesel-electric locomotives, electric hybrid vehicles), and battery electric vehicles. Motor types and control DC motor, Direct-current motors with series Field coil, field windings are the oldest type of traction motors. These provide a speed-torque characteristic useful for propulsion, providing high torque at lower speeds for acceleration of the vehicle, and declining torque as speed increases. By arranging the field winding with multiple taps, the speed characteristic can be varied, allowing relatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Küsnacht
Küsnacht is a municipality in the district of Meilen in the canton of Zurich in Switzerland. History Küsnacht is first mentioned in 1188 as ''de Cussenacho''. Earliest findings of settlement date back to the stone age. There are also findings from the Bronze Age. During Roman times, a mansion was located on the commons. It was called ''fundus Cossiniacus'' which is probably the origin of the name of Küsnacht. In the 7th century the name was recorded as ''Chussenacho''. The coat of arms shows a golden cushion on a red background. It is probably a derivate of the coat of arms of the aristocrats of Küssnacht am Rigi. In the Middle Ages, the land was governed by the House of Regensberg who lived in the castle of Wulp in Küsnacht. After 1531 Küsnacht was governed by Zurich. Like most other municipalities along Lake Zürich, Küsnacht started to become a suburb of the city of Zürich with the development of the railway link in 1896. The psychiatrist Carl Jung had his cli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternating Current
Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', as when they modify ''current'' or ''voltage''. The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa. In certain applications, like guitar amplifiers, different waveforms are used, such as triangular waves or square waves. Audio a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asynchronous Motor
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without electrical connections to the rotor. An induction motor's rotor can be either wound type or squirrel-cage type. Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, 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 (VFD) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel-cage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seebach-Wettingen Railway Electrification Trial
The Seebach-Wettingen railway electrification trial (1905-1909) was an important milestone in the development of electric railways. Maschinenfabrik Oerlikon (MFO) demonstrated the suitability of single-phase alternating current at high voltage for long-distance railway operation with the Seebach-Wettingen single-phase alternating current test facility. For this purpose, MFO electrified the 19.45-kilometre-long Swiss Federal Railways (SBB) route from Seebach to Wettingen at its own expense with single-phase alternating current at 15,000 volts. Overview By 1900, the use of direct current (DC), usually at 500-600 volts, to supply power to electric trams and trains was well-established. Examples include Trams in Budapest (from 1887) and the Liverpool Overhead Railway (opened 1893). This was satisfactory for urban systems but, for long distance railways, a higher voltage was desirable to reduce energy losses. The 106 km Valtellina line in Italy was electrified using three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1864 Births
Events January–March * January 13 – American songwriter Stephen Foster ("Oh! Susanna", "Old Folks at Home") dies aged 37 in New York City, leaving a scrap of paper reading "Dear friends and gentle hearts". His parlor song " Beautiful Dreamer" is published in March. * January 16 – Denmark rejects an Austrian-Prussian ultimatum to repeal the Danish Constitution, which says that Schleswig-Holstein is part of Denmark. * January 21 – New Zealand Wars: The Tauranga campaign begins. * February – John Wisden publishes '' The Cricketer's Almanack for the year 1864'' in England; it will go on to become the major annual cricket reference publication. * February 1 – Danish-Prussian War (Second Schleswig War): 57,000 Austrian and Prussian troops cross the Eider River into Denmark. * February 15 – Heineken brewery founded in Netherlands. * February 17 – American Civil War: The tiny Confederate hand-propelled submarine ''H. L. Hunl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
