Working Principle Of Constant Voltage Transformer

The working principle of Constant Voltage Transformer(CVT) is to use the principle of electromagnetic induction to maintain the output voltage stable through the shallow saturation state of the resonant circuit and the core. ‌

Core working principle‌

The constant voltage transformer works on the principle of electromagnetic induction. Its core components include a "日"-shaped core, the primary coil in one window hole, and the secondary coil and the resonant coil in another window hole. When the primary power supply is turned on, the resonant circuit starts to oscillate, making the secondary core shallowly saturated, forming a constant alternating magnetic field. This magnetic field passes through the secondary coil, causing the induced electromotive force to remain unchanged, thereby achieving a stable output of voltage. ‌

Detailed explanation‌

Principle of electromagnetic induction‌: When a conductor is in a changing magnetic field, an induced current or induced electromotive force is generated in it. The constant voltage transformer uses this principle to ensure the stability and consistency of the output voltage through a carefully designed coil and core structure. ‌
Design of the resonant circuit‌: The frequency of the resonant circuit is close to the power frequency, which plays a role in stabilizing the output voltage. Through precise circuit design and component selection, it is ensured that the output can still be stable when the input voltage changes. ‌
Core selection‌: Use materials with high magnetic permeability to make the core to reduce magnetic resistance and increase magnetic flux, thereby enhancing the inductance effect and making the output more stable. ‌

Application scenarios‌

Constant voltage transformers are widely used in electronic devices that require stable voltage, such as precision electronic instruments, microcomputers and CNC equipment. It can effectively eliminate clutter interference in the power grid, provide a stable power supply environment, and ensure the normal operation of the equipment and data accuracy. ‌