Principle Of Constant Voltage Transformer

The principle of Constant Voltage Transformer(CVT) is to maintain the output voltage constant based on electromagnetic induction and ferromagnetic resonance. ‌

The constant voltage transformer, also known as the voltage regulating transformer, is a special transformer mainly used to provide a constant voltage output. Its core principle is as follows:

‌Electromagnetic induction‌

When AC is passed through the primary coil, the iron core generates an alternating magnetic field. This magnetic field passes through the secondary coil, thereby inducing a voltage in it. By changing the turns ratio of the primary and secondary coils, the output voltage can be precisely adjusted‌.

‌Ferromagnetic resonance‌

The constant voltage transformer uses the principle of ferromagnetic resonance to maintain the stability of the output voltage. In the transformer, there is a "日"-shaped iron core, the primary coil is in one window hole, and the secondary coil and the resonant coil are in another window hole. When the primary power supply is turned on, the resonant circuit starts to oscillate, causing the secondary iron core to be shallowly saturated, forming a constant alternating magnetic field. This magnetic field is not affected by changes in the input voltage, so the induced electromotive force of the secondary coil remains unchanged‌.

‌Automatic voltage stabilization and anti-interference‌

In addition to the above principles, the constant voltage transformer also has automatic voltage stabilization and anti-interference functions. It can automatically adjust the output voltage according to the changes in the load to ensure that the load is supplied with stable power. At the same time, its design also effectively resists the interference of clutter in the power grid and improves the stability and reliability of the equipment‌.

‌Application scenarios‌

Because the constant voltage transformer can provide precise and reliable power supply, it is widely used in industrial applications that require stable power support, such as automation equipment, lighting and electrical control systems, etc.‌