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This article mainly shows you "what is the volt-second balance principle in the Internet". The content is simple and easy to understand and the organization is clear. I hope it can help you solve your doubts. Let Xiaobian lead you to study and learn this article "what is the volt-second balance principle in the Internet".

relevant introduction

The volt-second value is the volt-second product, that is, the product of the voltage V across the inductor and the time T, although the volt-second value is also commonly referred to as the volt-second product.

Volt-second balance, generally used in switching circuits. Voltage-second product balance does not require constant voltage source excitation, the voltage across the inductor can be changed, but the switching power supply can usually be considered that the voltage across the inductor is constant, the inductor must work stably, the current increment in the complete cycle must be zero, otherwise there is bias magnetic generation, accumulation will be saturated.

The current in the inductor must not change abruptly.

defined

Volt-second balance principle: in steady-state operation of the switching power supply inductor across the positive volt-second value is equal to the negative volt-second value.

When the switching circuit works stably, the current variation of the inductor in a switching cycle is finally 0, that is, the current increment through the inductor and the current decrease of the inductor are equal. In other words, in a switching circuit, a cycle is divided into two sections due to switching action, in which the inductor current increases during one period of time and the inductor current decreases during the other period of time. In a steady state, then in a switching cycle, the increase in current is equal to the decrease in current.

i. e. ΔI_on=ΔI_off i. e. that current change of inductor is equal when it is on and off. For example, if you turn on the switch to supply power to the inductor and then turn it off, the incremental current through the inductor ends up being zero, and the increased current equals the decreased current. This is also a steady state.

Because the voltage formula of inductance is V=L×di/dt=L×ΔI/ ΔT, VΔT_on=VΔT_off, that is, volt-second balance. Inductors are not energy-consuming elements, so in the equilibrium state inductance absorption and release of energy is consistent, w=1/2*L*i*i, that is, the amount of change in current is consistent, so V*ΔT consistent, from another point of view, it can also be seen that the higher the inductance terminal voltage, the faster the current rise, the faster the charge.

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