High Frequency Digital Power Circuit

Abstract

The invention discloses a high-frequency digital power circuit which comprises an EMI filtering rectifier, an optical coupler drive unit, a microcontroller, a voltage regulation circuit and a switching circuit, wherein the EMI filtering rectifier, the voltage regulation circuit, the microcontroller and the optical coupler drive unit are successively connected, one end of the switching circuit is connected with the voltage regulation circuit, and the other end of the switching circuit is connected with the optical coupler drive unit. According to the high-frequency digital power circuit provided by the invention, output signals are stable in the voltage value, and damage on power supply caused by instable voltage signals in the prior art is avoided.

Description

technical field [0001] The invention relates to the field of power factor adjustment, in particular to a high-frequency digital power supply circuit. Background technique [0002] Power Factor Correction (PFC, Power Factor Correction), that is, to adjust the relationship between effective power and total power consumption, that is, the ratio of effective power divided by total power consumption (apparent power). Those skilled in the art can understand that the power factor can measure the degree of effective utilization of electric power, and the greater the value of the power factor, the higher the utilization rate of electric power. In the power factor correction system, its digital discrete sampling module needs to perform proportional integral adjustment on the mixed DC voltage and DC current signals containing harmonic components and other waveforms. In the prior art, the method of calculating the average value of discrete sampling values ​​is used for adjustment. , bu...

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Problems solved by technology

In the power factor correction system, its digital discrete sampling module needs to perform proportional integral adjustment on the mixed DC voltage and DC current signals containing harmonic components and other waveforms. In the prior art, the method of calculating the average value of discrete sampling values ​​is used for adjustment. , but for the DC output signal containing the AC second harmonic, to calculate the average value of its discrete sampling values, at least the average value of all sampling values ​​within a period of 10 milliseconds should be calculated, so that the proportional-integral adjustment will cause voltage signal delays of at least 10 milliseconds, that is, the dynamic response time of proportional integral adjustment needs at least 10 milliseconds

For high-frequency digital power supplies, if the dynamic response time is too long, it will cause damage to the power supply, and there are large fluctuations in the average value calculated for waveforms with a repeat period not equal to the calculation period, which makes the output signal of the proportional-integral adjustment not stable. Stable, so that there is a large fluctuation in the output voltage

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