Concept, classification and application of single-phase transformer
Writer： Hengfeng you electric Time：2023-04-06 views：times
Working principle of single-phase transformer
It is correct that a single-phase transformer is one in which the primary and secondary windings are single-phase windings. Its working principle is as follows:
When the sinusoidal AC voltage U1 is applied at both ends of the primary coil, there is AC current I1 in the conductor and AC magnetic flux is generated ф 1. A closed magnetic circuit is formed along the primary coil and secondary coil. Iron core. The mutual inductance potential U2 is induced in the secondary coil, ф 1 The self induced potential E1 is also induced on the primary coil. The direction of E1 is opposite to that of the applied voltage U1, and the amplitude is similar, thus limiting the size of I1. To maintain magnetic flux ф 1 requires a certain power consumption, and the transformer itself also has a certain loss. At this time, although the secondary is not connected to the load, there is still a certain current in the primary coil. This current is called "no-load current".?
If the secondary is connected to the load, the secondary coil will generate current I2, thus generating magnetic flux ф 2。 ф 2 direction and ф 1 is in the opposite direction. They cancel each other and reduce the total magnetic flux in the iron core. The primary self inductance voltage E1 decreases, and I1 increases as a result. It can be seen that the primary current is closely related to the secondary load. When the secondary load current increases, I1 increases, ф 1 also increased, ф 1 The added part just supplements the ф 2 Offset part of the magnetic flux to keep the total magnetic flux in the iron core unchanged. If the loss of transformer is not considered, it can be considered that the power consumed by the ideal transformer secondary load is the electrical power obtained by the primary power supply from the power supply. The transformer can change the secondary voltage by changing the number of turns of the secondary coil as required, but it cannot change the power allowed to be consumed by the load.
Conclusion of Hengfengyou Electric Co., Ltd.: Simply put, it is to convert electric energy into magnetic energy, and then convert magnetic energy into electric energy. The output voltage is a relative voltage, but there is voltage between the two lines, but there is no voltage to the ground. It is also called safety voltage.
Classification of single-phase transformers
A single-phase transformer is a transformer whose primary and secondary windings are both single-phase windings.
Unipolar switching power supply means that the output is unipolar, that is, there are only positive and negative outputs. Compared with bipolar switching power supply, bipolar switching power supply has three outputs, including positive power supply, negative power supply and ground wire.
Single phase transformer has simple structure, small volume, low loss, mainly small iron loss, and is suitable for application and promotion in low-voltage distribution network with small load density. Suzhou has used more than 1000 sets accumulatively, saving 45GWh of electricity. The experience is worth popularizing. According to data, single-phase transformers are widely used in developed countries such as the United States and Japan, and single-phase power supply has become the main way for residents to supply power. Under such publicity, some people believe that single-phase power supply has the magic of "loss reduction", that single-phase transformer is more energy-saving than three-phase transformer, and that single-phase power supply system is superior to three-phase power supply system. Phase power supply system. In fact, single-phase transformer and single-phase power supply system are only complementary forms of three-phase power supply system at present. Due to the limitation of its own characteristics, it can only be used in some specific fields.
Application of Single Phase Transformer
The application of single-phase transformer in China, single-phase transformer and single-phase power technology has been developing. As early as the late 1950s, single-phase transformers were exported abroad. Over the years, the development of science and technology has promoted the development of single-phase transformers. The application of wound core and amorphous core technology in single-phase transformer can greatly reduce the core loss of transformer.
According to the analysis, when the urban and rural power grids are reconstructed to a certain extent, the proportion of line loss in the network loss will be greatly reduced, and the no-load loss of distribution transformers will occupy the main position of the power grid. The network is lost. Only by greatly reducing the core loss can the power loss of the power grid be further reduced. Therefore, wound core and amorphous core single-phase transformers have great development potential. At present, three-phase transformer and three-phase centralized power supply system are still dominant, while single-phase transformer and single-phase power supply system are only supplementary. In the practical application of transformer, the advantages and characteristics of three-phase transformer and single-phase transformer shall be fully utilized, and the appropriate transformer type shall be selected according to the power load, and the power supply with economic power supply radius shall be configured.
Hengfengyou Electric single-phase transformer
Hengfengyou Electric focuses on the manufacturing and export of various distribution transformers, rectifier transformers, furnace transformers and mining transformers, and has been exported to more than 30 countries and regions around the world, including Uzbekistan, Kazakhstan, Pakistan, Kuwait, Iraq, the United Arab Emirates, Zimbabwe, Tanzania, South Africa, the United States and Spain. With 30 years of power transformer manufacturing and sales experience, Hengfengyou Electric will provide you with the best electrical product solutions, www.hengfengyou com ； info@hengfengyou.com ； WhatsApp：+86158 5325 2696（Jack） +86158 5326 5269（Alisa）
