Stage High
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Stage High
High Iron Age: high speed approaching the hi and Anxiety - high-speed rail, energy conservation, railway development - Electrical industry
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With the global level of economic development reached a certain stage, high-iron hot start in the global rise. High-speed railway is no longer a luxury only the developed countries to enjoy a growing number of emerging countries to meet the economic and social development, began to finance the construction of high-speed railway. China is now the main two high-speed rail construction in respect of the infrastructure, including the roadbed, bridges, rails, etc., the second is in the motorcycle include cars, Electronic Equipment, vehicle accessories.
High-speed rail as a modern society, a new mode of transport, has very obvious advantages. Running speed, top speed of 350 km, called terrestrial flight; in the transport capacity on a long train can be grouping more than 1,000 transportation, every 3 minutes to open a train, a strong capacity; to adapt to natural environment, high-speed trains can run around the clock, basically from the impact of rain and snow fog; the train line to take "public transportation" of the model, visitors can pick-go; in energy saving Environmental protection , The high-speed railway is green transport, energy conservation is to adapt to the requirements.
High-speed rail investment is generally divided into three blocks: railway construction (civil engineering), vehicle equipment (EMU), ATC (control system), according to Beijing-Shanghai high-speed rail 1,318 km 220.9 billion yuan of investment dollars, about three proportional relationship of 60:30:10. High Speed Rail domestic costs are normally 100 000 000 -1.5 million / km (including roads, stations and vehicles), general 300 million yuan of foreign / km, according to China's long-term railway passenger line network planning to build 13,000 kilometers by 2012 PDL meter The total investment of about 1.41 trillion yuan, to be completed by 2020 16,000 km of passenger dedicated account, the estimated total investment will reach 1.8 trillion yuan.
Large-scale development of high-speed railway, its economic importance and social significance is no doubt self-evident. Ordinary people directly feel the movement in the country will be very convenient, but experts believe that the areas along with high-speed railway will become "economic corridor", the regional economy will also be a result of "iron age" of the arrival of the rapid development of efficient and convenient Transportation System to strengthen regional Cooperation Accelerate regional integration and national market integration process is of great significance.
Order to speed up railway development, as early as January 2004, the State Council executive meeting to consider the adoption of the "long-term railway network plan." However, until October 2008, "long-term railway network plan," adjust the program was officially approved by the state promulgated and implemented.
Huge investment in high-speed railway birth of the "aristocratic fare" aroused great controversy. In fact, since 2005, the Ministry of Railways on the operation of the market to determine the investment and financing system reform program, but private capital investment in the field of rail transport is still minimal. Currently, the financing of railway construction over the railway construction fund and the Ministry of Railways, the railway debt issuance. In 2009, the national railway company newly established 43 joint ventures, has reached 145, the scale of investment 3 trillion yuan. However, in the joint-venture railways, local governments to invest in land acquisition and resettlement is the most important joint venture shareholding pattern, while Other Social capital to invest in the initiative is not high.
The cost of high-speed rail not only reflected in the pre-construction costs, more may be reflected in the latter part of the operation and maintenance. From 200 km to 350 km per hour, whether it is operating, energy consumption, or system, the cost to be much higher. As a key technology of the high-speed railway train control system technology, which functions as the central nervous system and brain train. Currently only a few countries in the world to master the technology. High-speed train running in the circumstances, to ensure operation of high-density, high reliability and high security, this has as one of the key devices and key technologies of the train control system is presented enormous challenges.
Throughout the course of development of high-speed railway in China, perhaps it is in dispute among the parties to the evolving, it opened and paved a high-speed rail line with China's national conditions of road. In accordance with the overall planning, by 2020, China and over 200 km per hour high-speed railway construction mileage is expected to more than 18,000 kilometers, will account for high-speed railway in the world for more than half the total mileage.
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Multi stage high voltage transformers?
Can anyone here explain to me how multi stage transformers work, like the kind used in X ray machines. They have several pancake style stacks of windings. Is there a capacitance reactance that multiplies the voltage between them?
How do they get such high voltage from so few windings?
Why are there multiple sets (stacks) of windings instead of just one large winding?
How is the voltage calculated?
The voltage out put of a transformer is based on the ratio of the number of windings on the input to the number of winding on the output stage
On a multi stage transformer there are many windings of different number of turns giving different voltages.
06. Stage Dives and High Fives - Honor Bright
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