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CRRC MA HR4000
The HR4000 is a rapid transit railcar being manufactured by CRRC and assembled in Springfield, Massachusetts for the Los Angeles Metro Rail heavy rail lines. A total of 64 cars are being built as part of the base order, primarily for initial section of the D Line Extension, with 5 (contradictory information exists about this) options that total 218 cars, 282 cars total, intended to replace the Breda A650 as well as for overall expansion and to accommodate the later parts of the extension. Development Shortly after the groundbreaking of the Purple Line Extension in 2014, procurement started for new trains to run on it. The base order consists of 64 cars, 34 for the Purple Line Extension Phase 1, and 30 to replace the first order A650s (cars 501-530) with DC motors, which would have been retired in 2021, although this has not occurred. In 2014 there were 4 option orders totaling to 218 cars; 112 cars for general expansion, 20 cars for Purple Line Extension Phase 2, 12 for Phase 3, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springfield, Massachusetts
Springfield is a city in the Commonwealth of Massachusetts, United States, and the seat of Hampden County. Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers: the western Westfield River, the eastern Chicopee River, and the eastern Mill River. At the 2020 census, the city's population was 155,929, making it the third-largest city in Massachusetts, the fourth-most populous city in New England after Boston, Worcester, and Providence, and the 12th-most populous in the Northeastern United States. Metropolitan Springfield, as one of two metropolitan areas in Massachusetts (the other being Greater Boston), had a population of 699,162 in 2020. Springfield was founded in 1636, the first Springfield in the New World. In the late 1700s, during the American Revolution, Springfield was designated by George Washington as the site of the Springfield Armory because of its central location. Subsequently it was the site of Shays' Rebellio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breda A650
The A650 is an electric multiple unit subway car built for use on the Los Angeles Metro Rail system. The cars were manufactured by the Italian company Breda at its Pistoia plant between 1988 and 1997 and are used on the Metro B and D Lines. Details The fleet of 104 vehicles was supplied in two orders. The first batch of vehicles (fleet numbers 501–530) were built between 1988 and 1993 and are propelled by chopper control and DC motors designed and manufactured by Garrett Air Research, later supported by ABB. The second batch of vehicles (fleet numbers 531–604), were built between 1995 and 1997 and include 3-phase AC 4-pole asynchronous traction motors and VVVF inverter control using GTO thyristor technology, manufactured by General Electric. Both types of vehicles use electronic sliding pocket doors, air conditioning and braking systems built by Wabtec. Costing $1.5 million each, the trains usually run in four to six car consists, and feature automatic train contro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pocket Door
A pocket door is a sliding door that, when fully open, disappears into a compartment in the adjacent wall. Pocket doors are used for architecture, architectural effect, or when there is no room for the swing of a hinged door. They can travel on rollers suspended from an overhead track or tracks or guides along the floor. Single- and double-door versions are used, depending on how wide an entry is desired. Design Installing a pocket door rather than a hinged door can free up an average of of floor space, according to building expert Tim Carter, who considers the pocket door "one of the top ten most overlooked items when many architects and builders plan a home". The doors were particularly common in Victorian homes to close off such areas as sitting rooms or dens; however, as architectural tastes changed, many of the hardware manufacturers went out of business. With improvement in the hardware and the growth of the market for condominiums and town homes, there has been a resurgenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Current Collector
Electric current collectors are used by trolleybuses, trams, electric locomotives or EMUs to carry electrical power from overhead lines, electrical third rails, or ground-level power supplies to the electrical equipment of the vehicles. Those for overhead wires are roof-mounted devices, those for rails are mounted on the bogies. Typically, electric current connectors have one or more spring-loaded arms that press a collector or contact shoe against the rail or overhead wire. As the vehicle moves, the contact shoe slides along the wire or rail to draw the electricity needed to run the vehicle's motor. The current collector arms are electrically conductive but mounted insulated on the vehicle's roof, side or base. An insulated cable connects the collector with the switch, transformer or motor. The steel rails of the tracks act as the electrical return. Electric vehicles that collect their current from an overhead line system use different forms of one- or two-arm pantograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CRRC
CRRC Corporation Limited (known as CRRC) is a Chinese state-owned and publicly traded rolling stock manufacturer. It is the world's largest rolling stock manufacturer in terms of revenue, eclipsing its major competitors of Alstom and Siemens. It was formed on 1 June 2015 through the merger of CNR and CSR. As of 2016 it had 183,061 employees. The parent company is CRRC Group, a state-owned enterprise supervised by the State-owned Assets Supervision and Administration Commission of the State Council. The State Council also owned additional shares via China Securities Finance and Central Huijin Investment. History CNR Group and CSR Group, were once one company, (LORIC). The company was split up in 2002. In late 2014, CNR Group and CSR Group agreed to merge, subject to approval by the Chinese state. Under the agreement, CNR Group would formally acquire CSR Group (but CSR Corporation Limited would acquire China CNR Corporation Limited), and the combined business would be renamed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles Metro Rail
The Los Angeles Metro Rail is an urban rail transit system serving Los Angeles County, California, United States. It consists of seven lines, including five light rail lines (the A Line (Los Angeles Metro), A, C Line (Los Angeles Metro), C, E Line (Los Angeles Metro), E, K Line (Los Angeles Metro), K, L Line (Los Angeles Metro), L lines) and two rapid transit (known locally as a subway) lines (the B Line (Los Angeles Metro), B and D Line (Los Angeles Metro), D lines) serving List of Los Angeles County Metro Rail stations, 99 stations. It connects with the Los Angeles Metro Busway, Metro Busway bus rapid transit system (the G Line (Los Angeles Metro), G and J Line (Los Angeles Metro), J lines), the Metrolink (California), Metrolink commuter rail system, and several Amtrak lines. Metro Rail is owned and operated by the Los Angeles County Metropolitan Transportation Authority (Metro) and started service in 1990. It has been extended significantly since that time and several further ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D Line Extension
The Metro Purple (D Line) Extension Transit Project, formerly known as the Westside Subway Extension and the Subway to the Sea, is a construction project in Los Angeles County, California, extending the rapid transit D Line (formerly the Purple Line) of the Los Angeles Metro Rail system from its current terminus at in Koreatown, Los Angeles, to the Westside region. The project is being supervised by the Los Angeles County Metropolitan Transportation Authority (Metro). The subway has been given high priority by Metro in its long-range plans, and funding for the project was included in two county sales tax measures, Measure R and Measure M. The project's draft environmental impact statement was completed in September 2010, and a locally preferred alternative was selected in October 2010. Metro released the D Line (then the Purple Line) Extension's final environmental impact report in 2012. The entire project was approved at the Metro Board of Directors meeting on April 26, 201 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DC Motor
A DC motor is any of a class of rotary electrical motors that converts direct current (DC) electrical energy into mechanical energy. The most common types rely on the forces produced by induced magnetic fields due to flowing current in the coil. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motors widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor, a lightweight brushed motor used for portable power tools and appliances can operate on direct current and alternating current. Larger DC motors are currently used in propulsion of electric vehicle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AC Motor
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor (electric), rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings. Less common, AC linear motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation. Operating principles The two main types of AC motors are induction motors and synchronous motors. The induction motor (or asynchronous motor) always relies on a small difference in speed between the stator rotating magnetic field and the rotor shaft speed called slip to electromagnetic induction, induce rotor current in the rot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinki Sharyo P3010
The Kinki Sharyo P3010 is an articulated light rail car used on the Los Angeles County Metro Rail system manufactured by Kinki Sharyo, operated on all of the Metro Rail light rail lines. History of the contract AnsaldoBreda delivered 50 P2550 LRVs to Metro between 2006 and 2011 for use on the newly expanded Gold Line. Delivery of the vehicles was approximately three years behind schedule, and Metro claimed they were overweight; thus, the agency chose not to exercise their option to purchase more beyond this initially contracted order. However, with multiple light rail lines under construction or in planning and the P865s approaching their end of life, Metro anticipated a substantial need for LRVs and thus requested bids for a new contract, for vehicles which were dubbed the P3010 series. The base P3010 contract order was for 78 cars: 63 cars for the Expo and Blue lines, and 15 cars for the Gold Line Foothill Extension. (Phase 1 of the Expo Line used P865 cars from the exi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles Metro Rail Rolling Stock
The Los Angeles County Metropolitan Transportation Authority (Metro) operates six rail lines as part of its Metro Rail system. This system includes 5 light rail lines and 2 heavy rail lines. The agency owns, operates, and maintains a fleet of over 450 rail vehicles to operate these services. Rail vehicles Current fleet Metro operates two main types of rail vehicles: heavy rail vehicles and light rail vehicles. Metro's heavy rail vehicles, used on the B and D Lines, are electric multiple unit, married-pair cars, powered by electrified third rail, that typically run in four or six-car consists. Metro's light rail vehicles, used on the A, C, E, K and L Lines, are articulated double-ended vehicles, powered by overhead lines, which typically run in two or three vehicle consists. Future fleet Retired fleet Rail facilities Current rail facilities Rail vehicles are maintained at several facilities across Los Angeles County: Planned rail facilities Metro is pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Multiple Units Of The United States
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
