The transformer, also called the converter, is to convert the high-voltage electricity produced by the power plant into the low-voltage electricity required by the electric appliance in the long-distance transportation of electric energy. It has various functions such as variable pressure and variable flow. According to the role of transmission and distribution power, the boost, step-down and distribution transformers can be divided. According to different cold cloth media, it can be divided into three types: air self-cooling, dry type and oil type. The oil type transformer is the most common type of application. It mainly consists of the main part (core coil), cooling part (tank, heat pipe), take-off device (insulation bushing and tap changer) and protection device (reservoir cabinet, explosion-proof tube, gas relay).
How the transformer works
A pair of or three pairs of coils (single or three phase) are wound on a closed core. The coil that is connected to the power source is called the primary coil (primary or primary coil). The coil that is connected to the load is called a secondary coil (secondary or secondary coil). When the primary coil is connected to the AC power source, current flows through the primary coil, thereby generating an alternating magnetic flux Φ in the closed iron core. This alternating magnetic flux Φ passes through both the primary coil and the secondary coil. According to the principle of electromagnetic induction, the primary coil will generate a self-induced electromotive force, and the secondary coil will generate a mutual electromotive force. At this time, the bulb (load) is connected to the secondary coil, the light is illuminated, and current flows through the loop.
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