【2018年必威体育精装版整理】传感器英文论文.docxVIP

《电气工程及其自动化专业英语》课程论文 年 级 专 业 姓 名 学 号 TransformerThe basic concept of transformerPower transformer is a kind of static electrical equipment, is used for AC voltage is a numerical (current) into a voltage value of the same frequency one or several different (current) equipment. When a winding with alternating current, is generated by the alternating magnetic flux, the alternating magnetic flux through the iron core of the magnetic effect, the AC induction electromotive force in the two secondary winding. The two induction electromotive force level and one or two times the number of winding turns the number of voltage size and number of turns is proportional to. The main function is to transmit electricity, therefore, the rated capacity is its main parameters. Rated capacity is used in a performance of power value, it is the characterization of electrical energy transmission size, with kVA or MVA said that when the rated voltage is applied to the transformer, according to it to determine under specified conditions does not exceed the rated current value of temperature riseThe development trend of transformerDistribution transformer in China usually refers to the voltage of 35kV and 10kV and below, capacity below 6300kVA power transformer terminal user directly to the power supply. At present, the national online operation of distribution transformer total power loss is about 41100000000 kWh, accounting for about 3.16% of total generating capacity in 2000. Although the distribution transformer is high-efficiency equipment (95-99%), but because of the large quantity and fixed the no-load power consumption, transformer efficiency even small improvements can also considerable energy saving and reduction of greenhouse gas emissions, so its itself there is a huge energy saving potentialIn the late 90, the speed of the development of industry of our country distribution transformer faster. Since 1997, due to urban and rural power grid r