A power transformer is a static electrical device that is used to change a certain value of an ac voltage (current) to another value or values ​​of a different voltage (current) at the same frequency.
Gold fried how to make money free guide experts Gold and silver TD account guide Gold and silver simulated trading software bank Gold number desktop quotes tool When a winding through to AC, it produces alternating flux, alternating flux through the core guide Magnetism, in the secondary winding induction induced electromotive force. The level of the secondary induced electromotive force is related to the number of turns of the secondary winding, that is, the voltage is proportional to the number of turns. The main function is to transmit electrical energy, therefore, the rated capacity is its main parameter.
Nominal capacity is a conventional value of power performance, which is the size of the transmission power in kVA or MVA. When a rated voltage is applied to the transformer, it is used to determine the rated current that does not exceed the temperature rise limit under the specified conditions. The more energy-efficient power transformer is amorphous alloy core distribution transformer, the biggest advantage is that no-load loss is particularly low.
Ultimately ensure that the value of no-load loss is the core of the design process to be considered. When the product structure layout, in addition to considering the amorphous alloy core itself from the role of external forces, but also in the calculation must be accurate and reasonable selection of amorphous alloy parameters.
Larger domestic manufacturers of power transformers in the electrical, Paul change Tianwei, Xidian Group, Shandong Mingda Electric, Shandong Power Equipment Factory.
The role of power transformers:
Power transformers are one of the major equipment for power plants and substations. The role of the transformer is not only in many ways can raise the voltage to the electricity area, but also to reduce the voltage for all levels of use of voltage to meet the needs of electricity.
In short, both step-up and step-down must be done by the transformer. In the process of transmitting electric energy in the power system, voltage and power loss will inevitably occur. When the same power is transmitted, the voltage loss is inversely proportional to the voltage, and the power loss is inversely proportional to the square of the voltage. The use of transformers to increase voltage, reducing transmission losses.
Transformer is composed of two or more coil windings wound on the same core. The windings are connected by alternating magnetic field and work according to the principle of electromagnetic induction. Transformer installation location should be considered easy to run, overhaul and transport, should choose safe and reliable place. Transformer must be used in a reasonable choice of rated capacity. Transformer no-load operation, the need for greater reactive power. These reactive power to be supplied by the power supply system.
If the transformer capacity is too large, not only increase the initial investment, but also the long-term transformer in the no-load or light-load operation, so that the proportion of no-load loss increases, the power factor decreases, the network loss increases, this operation is neither economical nor reasonable. Transformer capacity selection is too small, will make the transformer long-term overload, easy to damage the equipment. Therefore, the rated capacity of the transformer should be based on the needs of electricity load to choose, not too big or too small.
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