A transformer has two or more separate coil winding placed on a common magnetic core.source site
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But the primary coil winding is responsible for supplying the alternating current AC with supplied frequency and it produces the magnetic flux in the same frequency in the magnetic core. Then the flux linkage to the secondary coil winding also changes at the same frequency resulting in induced e. But the direction of induced e. The transformer has several applications for use. So transformer design, types and its accessories are depended upon its size, application, and the location. Now there are some components and accessories of a transformer ,.
A power transformer has several types like two winding transformers, three winding transformers and the autotransformer. Besides the autotransformer and the power transformer, there are great verities of a special transformer. It includes the following,. Now if you find this post useful then please share with your friends and let them know something about power transformer.
Step up transformer increase the low primary voltage to a high secondary voltage. Again it is achieved by the ratio of primary and secondary winding ratio. For the Step Up transformer, the ratio of the primary winding and the Secondary winding remains less than 1. That means the number turns in secondary winding is higher than the primary winding. In electronics, step up transformers often used in stabilizers, inverters etc where low voltage is converted to a much higher voltage. A step-up transformer is also used in Electrical power distribution.
High voltage is required for power distribution related application.
Power Transformers-Principles and Applications [Book Review] - IEEE Journals & Magazine
Step up transformer is used in the grid to step up the voltage level before the distribution. Isolation transformer does not convert any voltage levels. The Primary voltage and the secondary voltage of an isolation transformer always remain the same. This is because the primary and the secondary winding ratio is always equal to the 1. That means the number of turns in primary and secondary winding is same in isolation transformer. The isolation transformer is used to isolate the primary and secondary.
As discussed previously, the transformer does not have any electrical connections between primary and secondary, it is also used as an isolation barrier where the conduction happens only with the magnetic flux. It is used for safety purpose and to cancel noise transfer from primary to secondary or vice-versa. The transformer transfers the energy by conducting electromagnetic flux through a core material.
Different core materials produce different flux density. Depending on the core materials, several types of transformers are used in the power and electronics domain. Iron core transformer uses multiple soft iron plates as the core material.
Due to the excellent magnetic properties of iron, the flux linkage of the iron core transformer is very high. Thus, the efficiency of the iron core transformer is also high. The soft iron core plates can be available in multiple shapes and sizes. The coils of the primary and secondary wound or wrapped on a coil former. After that, the coil former is mounted in soft iron core plates. Depending on the core size and shapes, a different type of core plates is available in the market. Few common shapes are E, I, U, L, etc.
The iron plates are thin, and multiple plates are bunched together to form the actual core. For example, E type cores are made with thin plates with a look of letter E. Iron core transformers are widely used and usually heavier in weight and shape.
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A ferrite core transformer uses a ferrite core due to high magnetic permeability. This type of transformer offers very low losses in the high-frequency application. Due to this, ferrite core transformers are used in high-frequency application such as in switch mode power supply SMPS , RF related applications, etc. Ferrite core transformers also offer a different type of shapes, sizes depending on the application requirement.
It is mainly used in electronics rather than electrical application. The most common shape in the ferrite core transformer is E core. Toroidal core transformer uses toroid shaped core material, such as iron core or ferrite core. Toroids are ring or donut shaped core material and widely used for superior electrical performance. Due to the ring shape, the leakage inductance is very low and offers very high inductance and Q factors.
The windings are relatively short and weight is much less than traditional, same rating transformers. Air Core transformer does not use any physical magnetic core as the core material. The flux linkage of the air-core transformer is made entirely using the air. In air core transformer, the primary coil is supplied with alternating current which produces an electromagnetic field around it.
When a secondary coil is placed inside the magnetic field, as per the Faraday law of induction, the secondary coil is induced with a magnetic field which further is used to power the load. However, air core transformer produces low mutual inductance compared to physical core material such as iron or ferrite core.
It is used in portable electronics as well as Radiofrequency related applications. Due to the absence of physical core material, it is very light in terms of weight. Properly tuned air core transformer also used in wireless charging solutions, where the primary windings are constructed inside the charger and the secondary windings are situated inside the targeted device.
The transformer can be classified using winding orders. One of the popular types is Auto Winding Transformers. Till now, the primary and secondary winding is fixed but in case of an auto-winding transformer, the primary and the secondary coil can be connected in series and the center tapped node is movable. Depending on the center tapped position, the secondary voltage can be varied. The auto is not the short form of Automatic; rather it is to notify the self or single coil. This coil forms a ratio which consists of two parts, primary and secondary.
The position of the center tap node determines the primary and secondary ratio thus varying the output voltage. It is also used in Power transmission and distribution related applications where the high voltage lines are needed to be changed frequently. There are several types of transformers also available which works in a specific domain. Both electronics and electrical sectors, several dedicated transformers are used as a step-down or step-up transformer based on the application of application. So, the transformers can be classified as below based on usage:.
In Electrical, the Power domain deals with the power generation, measurement, and distribution. However, it is a very large field where transformers are an essential part to accommodate safe power conversion and successful power delivery to the substation and to the end users. The transformers which are used in the power domain can be both outdoor and indoor but mostly outdoor.
Power Transformers are larger in size and used to transfer the energy to the substation or the public electricity supply. This transformer acts as a bridge between the power generator and the primary distribution grid. Depending on the Power rating and specification, Power transformers can further be classified into three categories: Small power transformer, Medium Power transformers, and the Large power transformers.