The working principle of transformer core

Transformer iron core power system for power transmission, often using ac voltage, large current loop send electricity to the user, and the role of the transformer is ac voltage and high current in proportion to the instrument could be used directly to measure value, facilitate instrument direct measurement, at the same time provide power supply for relay protection and automatic device. Transformer quality determines whether the personal and equipment safety, and the role of iron core in the transformer determine his position. The working principle of transformer and transformer, are run by the principle of electromagnetic induction, so most used in the iron core of transformer can be applied to transformer iron core. South China sea, an iron core manufacturing co. , LTD. Production of ring core, c-type iron core, ladder type iron core, rectangular iron core, cut/laminated iron core, EI type iron core, opens the mouth to roll core and different core, they can apply to the transformer can also be used in the transformer. The discretion of the transformer core permeability has enormous influence on the accuracy of measurement of transformer. C type iron core, ring type iron core, ladder type iron core, rectangular core as winding core, adopts excellent orientation cold-rolled silicon steel materials, ensure the direction of the magnetic flux and the consistency of grain oriented silicon steel sheet, used in the transformer is safe and effective, low noise, low loss, such as short circuit capacity, compression resistance peculiar advantages, has been commonly used in transformer transformer product parts is the main function of the ac voltage and high current in proportion to the instrument could be used directly to measure value, facilitate instrument direct measurement, at the same time provide power supply for relay protection and automatic device. Transformer quality determines whether the personal and equipment safety, and the key role in the iron core in the transformer determine his position. Unlike the iron core of transformer magnetic flux density ( General design of transformer for less than 1. 7 t) Core, transformer magnetic flux density of the general design more low, about 0. 08 -- — Between 1 t. Commonly used C type transformer core orientation of cold rolled silicon steel rolled material cutting and become, its structure is two and a half C shape spell closed circuit synthesis, to the open structure. Especially suitable for low frequency electromagnetic components, in addition to the application in transformer, also applied to electronic equipment in the transformer, reactor, reactor. Field current is the main cause of low voltage current transformer error ( Reduce the excitation current) 。 In addition, also with the design of the core itself, such as production have a significant relationship, from the aspects of core can have the following methods to reduce error: first of all, using material of high permeability core, because the core magnetic can not only affect the contrast and the Angle difference, also affect the saturation ratio. Second, increase the core section, shorten the length of the magnetic circuit, increase the coil number of turns. Core section or coil ampere-turns will increase or decrease the corresponding increase and decrease saturation ratio, and to increase core section or coil of ampere turns to improve the contrast and the Angle difference, need to consider the effect on the saturation ratio.
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