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1、电力变压器电力变压器是一种静止的电气设备，是用来将某一数值的交流电压（电流）变成频率相同的另一种或几种数值不同的电压（电流）的设备。当一次绕组通以交流电时，就产生交变的磁通，交变的磁通通过铁芯导磁作用，就在二次绕组中感应出交流电动势。二次感应电动势的高低与一二次绕组匝数的多少有关，即电压大小与匝数成正比。主要作用是传输电能，因此，额定容量是它的主要参数。额定容量是一个表现功率的惯用值，它是表征传输电能的大小，以kVA或MVA表示，当对变压器施加额定电压时，根据它来确定在规定条件下不超过温升限值的额定电流。较为节能的电力变压器是非晶合金铁心配电变压器，其最大优点是，空载损耗值特低。最终能否确保空
2、载损耗值，是整个设计过程中所要考虑的核心问题。当在产品结构布置时，除要考虑非晶合金铁心本身不受外力的作用外，同时在计算时还须精确合理选取非晶合金的特性参数。国内生产电力变压器较大的厂家有Satons，中电电气，保变天威，西电集团，山东晨宇电气，山东电力设备厂等。Power transformer is a kind of static electrical equipment, is used to convert a certain number of AC voltage (current) into a frequency of the same or different kinds o
3、f numerical value of different voltage (current) equipment. When a winding is connected to alternating current, it generates an alternating flux, and the alternating flux through the iron core, and the electric potential is induced in the two windings. The two induction electromotive force is relate
4、d to the number of the one or two winding turns, that is, the voltage is proportional to the number of turns.The main function is to transmit power, and therefore, the rated capacity is the main parameter. Rated capacity is a manifestation of the value of conventional power, it is a characterization
5、 of the power transmission size, with kVA or MVA, 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 rise. More energy efficient power transformer is a power transformer core distributio
6、n transformer, the biggest advantage is that the no-load loss value is very low. Finally, it is the core problem to be considered in the whole design process. When the product structure layout, except to consider the non crystal alloy core itself is not subject to external force, and at the same time in the calculation of the characteristics of the amorphous alloy. Domestic manufacturers of large power transformer including Satons, electrical power, and become Print-Rite, West Group, Shandong Chenyu, Shandong electric power equipment factory.2