Hello friends,
Do you want to know what is the function and working principle of voltage transformer? Let's study it as following information.
The role of voltage transformer
1. the high voltage in proportion to the relationship between the conversion into 100V or lower level of the standard secondary voltage, for protection, measurement, instrumentation devices.
2. Using voltage transformer can isolate the high voltage from the electrical staff.
3. When the secondary load impedance decreases, the secondary current increases, making the primary current automatically increase a component to meet the electromagnetic balance between the primary and secondary sides.
The working principle of voltage transformer
The working principle of voltage transformer and transformer, to use the principle of electromagnetic induction to work. When the primary side of the AC voltage U1, the current flowing through the primary winding I1, the current in the iron core will produce alternating magnetic flux, so that the primary winding and secondary winding electromagnetic connection. According to the principle of electromagnetic induction, the alternating flux through the two windings will be induced electric potential, its size and the number of turns of the winding, the maximum value of the main flux is proportional to; more turns of the winding side of the voltage is high, less turns of the winding side of the voltage is low. When the secondary side of the transformer is open circuit, that is, when the transformer is no-load, one or two secondary terminal voltage is proportional to the number of turns of one or two windings, thus achieving the voltage change.
In the primary side of the voltage transformer AC voltage U1, the current flowing through the primary winding I1, the current in the core will produce alternating flux, so that the primary and secondary windings electromagnetic contact, according to the principle of electromagnetic induction, the alternating flux through the two windings will be induced by the electromotive force, the size of the winding turns and the maximum value of the main flux is directly proportional to the winding turns on the side of the voltage, the winding turns on the side of the voltage, winding turns Less turns of the winding side of the voltage is low, when the secondary side of the transformer is open circuit, that is, when the transformer is unloaded, one or two secondary terminal voltage is proportional to the number of turns of one or two windings, i.e., U1/U2=N1/N2, but the primary and secondary frequencies remain the same, so as to achieve a change in voltage.
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