In a transformer you want as many flux lines to go both through primary and secondary. Any geometrical quirks that let lines escape is a bad thing, except in some very special transformers where you want a current-limiting feature, like in neon si. 15 Sep With regards to construction, there are basically 2 types of transformers, which are the shell type transformer and the core type transformer. They are different from each other in the way they are wound around the magnetic core. As for the core type transformer, its winding surrounds a considerable part of its. Disadvantages: Threephase transformers are There is a difficulty in transporting a heavier threephase transformer These are the core type and the shell. But there are some disadvantages of dry type transformer. They are Dry type transformer is long lasting and with less chance of winding failure. advantages of shell type.
The flip side is (in case of 3 phase transformers) the zero sequence currents/ fluxes are better handled by the shell type transformers than the core type. There are advantages and disadvantages of both. A transformer for any specific rating and application can be designed to be of either type. The end. 14 Dec Core Type Transformer, Shell type transformer. The core has only one magnetic circuit. It has two magnetic circuits. Core has two limbs. Core has three limbs. It has less mechanical protection to coil. It has better mechanical protection to coil. It has better cooling since more surface is exposed to atmosphere. Two reasons. The EI core needs only one bobbin, and it needs less iron. See the attached pic of an EI core and an U core made of its parts. Double U core made of EI core. See how the EI core only needs 28 iron units while the U core needs 36? (Of course this is a simplification but even when you round.
13 Mar They are made up of two coils which are electrically separated but magnetically linked through a low reluctance (magnetic resistance) path. Construction-wise, we can divide transformers into two types. Core Type Transformer; Shell Type Transformer. A recent development is the spiral-core or wound-core. Core transformer and shell transformer - it has a one window. - it has a two windows. - less mechanical protection - better mechanical protection to the coils. to the c oils. -windings encircles the core. - core encircles the winding. - cylindrical windings are used. - sandwich type windings are used. - it is easy to repair. The shell-form transformer is a mechanically strong design for a transformer, with the coils arranged vertically and completely surrounded on all sides by the iron core. The tank of the shell-form transformer is a “form-fit design” that fits just over the core, creating a very strong reinforcement against possible coil movement.