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History Of The Electric Vehicle
Crude electric carriages were invented in the late 1820s and 1830s. Practical, commercially available electric vehicles appeared during the 1890s. An electric vehicle held the vehicular land speed record until around 1900. In the early 20th century, the high cost, low top speed, and short range of battery electric vehicles, compared to internal combustion engine vehicles, led to a worldwide decline in their use as private motor vehicles. Electric vehicles have continued to be used for loading and freight equipment, and for public transport – especially rail vehicles. At the beginning of the 21st century, interest in electric and alternative fuel vehicles increased due to growing concern over the problems associated with Fossil fuel, hydrocarbon-fueled vehicles, including damage to the air pollution, environment caused by their exhaust gas, emissions; the sustainability of the current hydrocarbon-based transportation infrastructure; and improvements in electric vehicle techno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Electric Vehicle
A hybrid electric vehicle (HEV) is a type of hybrid vehicle that couples a conventional internal combustion engine (ICE) with one or more electric engines into a hybrid vehicle drivetrain, combined propulsion system. The presence of the electric powertrain, which has inherently better energy conversion efficiency, is intended to achieve either better fuel economy in automobiles, fuel economy or better acceleration performance than a conventional vehicle. There is a variety of HEV types and the degree to which each functions as an electric vehicle (EV) also varies. The most common form of HEV is hybrid electric passenger cars, although hybrid electric trucks (pickup truck, pickups, tow trucks and tractors), buses, motorboats, and aircraft also exist. Modern HEVs use energy recovery technologies such as motor–generator units. and regenerative braking to recycle the vehicle's kinetic energy to electric energy via an alternator (automotive), alternator, which is energy storage, st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ányos Jedlik
Ányos István Jedlik (1800 – 1895) was a Hungarian inventor, engineer, physicist, and Benedictine priest. He was also a member of the Hungarian Academy of Sciences, and author of several books. He is considered by Hungarians and Slovaks to be the unsung father of the dynamo and electric motor. Career He was born in Szimő, Kingdom of Hungary (today Zemné, Slovakia). His parents were Ferenc Jedlik and Rozália Szabó. His mother was a member of a Hungarian noble family, while his paternal grandfather was of Slovak origin moving in 1720 from Liptó County to Szimő. ("It is likely that the Jedlik family arrived from Liptó by boat on the River Vág in 1720 and started to live in Szimő.") Jedlik's education began at high schools in Nagyszombat (today Trnava) and Pozsony (today Bratislava). In 1817 he became a Benedictine, and from that time continued his studies at the schools of that order, where he was known by his Latin name . In 1818-20 he studied humanities at the Ly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reluctance Motor
A reluctance motor is a type of electric motor that induces non-permanent magnetic poles on the ferromagnetic rotor. The rotor does not have any windings. It generates torque through magnetic reluctance. Reluctance motor subtypes include synchronous, variable, switched and variable stepping. Reluctance motors can deliver high power density at low cost, making them attractive for many applications. Disadvantages include high torque ripple (the difference between maximum and minimum torque during one revolution) when operated at low speed, and noise due to torque ripple. Until the early twenty-first century, their use was limited by the complexity of designing and controlling them. Advances in theory, computer design tools, and low-cost embedded systems for control overcame these obstacles. Microcontrollers use real-time computing control algorithms to tailor drive waveforms according to rotor position and current/voltage feedback. Before the development of large-scale integrat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct-drive
A direct-drive mechanism is a mechanism design where the force or torque from a prime mover is transmitted directly to the effector device (such as the drive wheels of a vehicle) without involving any intermediate couplings such as a gear train or a belt.Asada, H., & Kanade, T. (1983) Design of direct-drive mechanical arms' in ''Journal of Vibration, Acoustics, Stress, and Reliability in Design'', Volume 105, Issue 3, pp.312-316 History In the late 19th century and early 20th century, some of the earliest locomotives and cars used direct drive transmissions at higher speeds. Direct-drive mechanisms for industrial arms began to be possible in the 1980s, with the use of rare-earth magnetic materials. The first direct-drive arm was built in 1981 at Carnegie Mellon University. Today the most commonly used magnets are neodymium magnets. Design Direct-drive systems are characterized by smooth torque transmission, and nearly-zero backlash.Bruno Siciliano, Oussama Khatib (Eds., 2008 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Scottish Society Of Arts
The Royal Scottish Society of Arts is a learned society in Scotland, dedicated to the study of science and technology. It was founded as The Society for the Encouragement of the Useful Arts in Scotland by Sir David Brewster in 1821 and dedicated to ''"the promotion of invention and enterprise"''. The Society was granted a Royal Charter in 1841. Background For many years the promotion of invention and improvements of all sorts was the main business of the Society, and its meetings were the focus of a large and active cross-section of Edinburgh society - academics, gentry, professionals such as civil engineers and lawyers, and skilled craftsmen such as instrument makers, engravers and printers. The Society's published Transactions provide a record of changes in technology, and the Society's archive is held by the National Library of Scotland, and is a valuable resource to researchers. In more recent times, the Society's meeting programme has been based on lectures given by exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galvanic Cell
A galvanic cell or voltaic cell, named after the scientists Luigi Galvani and Alessandro Volta, respectively, is an electrochemical cell in which an electric current is generated from spontaneous oxidation–reduction reactions. An example of a galvanic cell consists of two different metals, each immersed in separate beakers containing their respective metal ions in solution that are connected by a salt bridge or separated by a porous membrane. Volta was the inventor of the voltaic pile, the first electrical battery. Common usage of the word ''battery'' has evolved to include a single Galvanic cell, but the first batteries had many Galvanic cells. History In 1780, Luigi Galvani discovered that when two different metals (e.g., copper and zinc) are in contact and then both are touched at the same time to two different parts of a muscle of a frog leg, to close the circuit, the frog's leg contracts. He called this " animal electricity". The frog's leg, as well as being a detector ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aberdeen
Aberdeen ( ; ; ) is a port city in North East Scotland, and is the List of towns and cities in Scotland by population, third most populous Cities of Scotland, Scottish city. Historically, Aberdeen was within the historic county of Aberdeenshire (historic), Aberdeenshire, but is now separate from the council area of Aberdeenshire. Aberdeen City Council is one of Scotland's 32 Local government in Scotland, local authorities (commonly referred to as ''councils''). Aberdeen has a population of for the main urban area and for the wider List of towns and cities in Scotland by population#Settlements, settlement including outlying localities, making it the United Kingdom's List of urban areas in the United Kingdom, 39th most populous built-up area. Aberdeen has a long, sandy coastline and features an oceanic climate, with cool summers and mild, rainy winters. Aberdeen received royal burgh status from David I of Scotland (1124–1153), which transformed the city economically. The tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Davidson (inventor)
Robert Davidson (18 April 1804 – 16 November 1894) was a Scottish inventor who built the first known electric locomotive in 1837. He was a lifelong resident of Aberdeen, northeast Scotland, where he was a prosperous chemist and dyer, amongst other ventures. Davidson was educated at Marischal College, where he studied second and third year classes from 1819-1821, including lectures from Professor Patrick Copland. He got this education in return for being a lab assistant. In the 1820s, he set up in business close to the Aberdeen-Inverurie Canal, at first supplying yeast, before becoming involved in the manufacture and supply of chemicals. He became interested in the new electrical technologies of the day. From 1837, he made small electric motors on his own principles. Exhibitions Davidson staged an exhibition of electrical machinery at Aberdeen, Scotland, and in Edinburgh, where it was viewed on 12 February 1842 by the young James Clerk Maxwell. Later he exhibited at the E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Davenport (inventor)
Thomas Davenport (July 9, 1802 – July 6, 1851) was a Vermont blacksmith who, with his wife Emily, constructed the first American Direct current, DC electric motor in 1834. Biography Davenport was born in Williamstown, Vermont. He lived in Forest Dale, a village in the town of Brandon, Vermont, Brandon. As early as 1834, he and his wife Emily Davenport developed a battery-powered electric motor. They used it to operate a small model car on a short section of track, paving the way for the later electrification of streetcars. It is the first attempt to apply electrification to locomotion. Davenport's 1833 visit to the Penfield and Taft iron works at Crown Point, New York, where an electromagnet was operating, based on the design of Joseph Henry, was an impetus for his electromagnetic undertakings. Davenport bought an electromagnet from the Crown Point factory and took it apart to see how it worked. Then he forged a better iron core and redid the wiring, using silk from his wif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blacksmith
A blacksmith is a metalsmith who creates objects primarily from wrought iron or steel, but sometimes from #Other metals, other metals, by forging the metal, using tools to hammer, bend, and cut (cf. tinsmith). Blacksmiths produce objects such as gates, grilles, railings, light fixtures, furniture, sculpture, tools, agricultural implements, decorative and religious items, cooking utensils, and weapons. There was a historical distinction between the heavy work of the blacksmith and the more delicate operations of a whitesmith, who usually worked in Goldsmith, gold, Silversmith, silver, pewter, or the finishing steps of fine steel. The place where a blacksmith works is variously called a smithy, a forge, or a blacksmith's shop. While there are many professions who work with metal, such as farriers, wheelwrights, and Armourer, armorers, in former times the blacksmith had a general knowledge of how to make and repair many things, from the most complex of weapons and armor to simple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermont
Vermont () is a U.S. state, state in the New England region of the Northeastern United States. It borders Massachusetts to the south, New Hampshire to the east, New York (state), New York to the west, and the Provinces and territories of Canada, Canadian province of Quebec to the north. According to the most recent U.S. Census estimates, the state has an estimated population of 648,493, making it the List of U.S. states and territories by population, second-least populated of all U.S. states. It is the nation's List of U.S. states and territories by area, sixth smallest state in area. The state's capital of Montpelier, Vermont, Montpelier is the least populous List of capitals in the United States, U.S. state capital. No other U.S. state has a List of largest cities of U.S. states and territories by population, most populous city with fewer residents than Burlington, Vermont, Burlington. Native Americans in the United States, Native Americans have inhabited the area for abou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primary Cell
A primary battery or primary cell is a battery (a galvanic cell) that is designed to be used once and discarded, and it is not rechargeable unlike a secondary cell ( rechargeable battery). In general, the electrochemical reaction occurring in the cell is not reversible, rendering the cell unrechargeable. As a primary cell is used, chemical reactions in the battery use up the chemicals that generate the power; when they are gone, the battery stops producing electricity. In contrast, in a secondary cell, the reaction can be reversed by running a current into the cell with a battery charger to recharge it, regenerating the chemical reactants. Primary cells are made in a range of standard sizes to power small household appliances such as flashlights and portable radios. Primary batteries make up about 90% of the $50 billion battery market, but secondary batteries have been gaining market share. About 15 billion primary batteries are thrown away worldwide every year, virtually al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
