The main components of the transformer: 
 (1) the body of: core, windings, insulation components and leads. 
 (2) regulating device: tap switch, divided into no excitation voltage and load voltage regulation 
 (3) fuel tanks and cooling equipment. 
 (4) protection devices: including the storage cabinet, safe airway, moisture, gas relays, oil purifier, and temperature measurement devices. 
 (5) insulating sleeve. 
 A core core transformer magnetic circuit. Usually by the high silicon content, the thickness of 0.35 mm \ 0.3mm \ 0.27 mm, coated with insulating paint, hot-rolled or cold-rolled silicon steel sheet piled both part of the core is divided into the core columns and the cross-piece core column set of windings; cross-piece is a closed magnetic circuit with the core structure, the basic form of heart-type and shell-and-two 
 Two winding winding winding transformer circuit, it is a flat line or enamelled round wire wound into a double silk covered insulation. The transformer's basic principle is the principle of electromagnetic induction, is single-phase two-winding transformer, for example the description of its basic operating principle: when the primary winding voltage is ú1 flow through current í1, the alternating magnetic flux in the core ? flux known as the main flux, in its role, both sides of the winding EMF é1 é2, EMF formula: E = 4.44fN? m where: E - EMF valid values ??for f - frequency N - number of turns? m - the maximum the main magnetic flux due to the secondary winding with a winding turns, EMF E1 and E2 the size of different spent within the impedance voltage drop voltage ú1 and ú2 size is different. When the transformer secondary side of the no-load, one side only flow main flux current (í0,,), this current is called the exciting current. The secondary side and the load flow of load current í2 also core flux, trying to change the main flux, but the voltage constant, the main flux is constant, the primary side should flow through two part of the current part of the exciting current í0 used to balance í2 part of for this part of the current í2 change. When the current multiplied by the number of turns, the magnetic potential. Above the balancing effect is essentially a balancing effect of the magnetic potential, transformers, the secondary side of the energy transfer through the balancing effect of the magnetic potential. The technical parameters of the transformer the technical requirements for different types of transformers have available appropriate technical parameters such as the main power transformer technology above parameters are: rated power, rated voltage and voltage, rated frequency, operating temperature rating, temperature l, voltage regulation, insulation and moisture resistant, for general low-frequency transformer technology above parameters are: the transformation ratio, the frequency characteristics of nonlinear distortion, magnetic shielding and electrostatic shielding efficiency. 
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