Wide Range Voltage Regulator, What Are The Disadvantages Of A Simple Wide Range Voltage Regulator?

The disadvantage of the simple Wide Range Voltage Stabilizer is that changes in input voltage will cause large changes in output voltage. To this end, the improvement method is to reversely connect part of the voltage in the unsaturated zone to the output voltage V0 in series to offset the changes. L3 and L1 are wound on the same unsaturated core to form a linear transformer. L3 is connected in series with L2, but the voltage direction is opposite, thereby compensating for the change in output voltage V0 and making V0 more stable. To make the core enter the saturation state, L1 will flow into a larger magnetic excitation current. Since L1 is an inductive load, the power consumed on the load is not the product VI of I and the grid voltage V, but UICOSa (COSa is called power factor). Therefore, the total current flowing through L1 will be relatively large, that is, the power consumption is too large, and the efficiency of the wide-range regulator is only about 50. For this reason, we can overcome it by the method of parallel ferromagnetic resonance. We know that the current on the inductor lags behind the voltage phase by 90 degrees, and the current on the capacitor leads the voltage phase by 90 degrees. If the inductor and capacitor are connected in parallel and the same voltage is applied, the current IL on the inductor and the current IC on the capacitor will cancel each other out. Therefore, when the magnitude of IL and IC is close to the same, although the values ​​of IL and IC are large, the total current supplied to this parallel circuit is very small. This phenomenon is called parallel resonance. The practical value of this ferromagnetic resonance is that the inductor can be saturated without a large input current, thus overcoming the disadvantage that the voltage stabilizing circuit draws too much current from the power grid. Basic knowledge of magnetic saturation transformer: The magnetic saturation transformer, also known as the constant voltage transformer, not only has multiple functions such as AC voltage stabilization, anti-interference, voltage conversion, overcurrent protection, but also has a simple structure, economical and reliable development and short cycle, and is easy to maintain and use. Since its advent, it has immediately received attention from all aspects and has been gradually promoted and applied in the power supply of computers, machine tools, lighting, mining, transportation, telecommunications, television lights and electronic equipment.