微功耗功率因数校正器

摘要

The voltage compensation method was applied in the micro power consumption power factor correction to achieve the power factor correction of power grid system to be ＂1＂ for the power factor and ＂0＂ for the total harmonic distortion （THD）. The advantage of the method is without the pulse width Modulation （PWM） and no generation of electromagnetic interference （EMI）. It takes a small portion of input power thru power conversion process and obtains total output power, that is, most portion of input power needs neither power conversion process, nor linear transformer or inductor transmit process. It connects to output terminal and become output power. Therefore, the power consumption is very small with long life, safe and more reliable than current standard methods. Efficiency of this method is nearly 100%, and cost is low enough to maintain and install.%微功耗功率因数校正器采用电压补偿的方法，实现了对电网电压的功率因数校正，达到网侧功率因数为1、总谐波畸变THD为零。其最大优点是，不采用PWM脉宽调制，不产生EMI干扰，只须将输入功率中的极小部份进行功率变换，就可以获得全部输出功率，即输入功率中极大部份不必进行实际的功率变换，也不必磁芯变压器或电感传递，真接到达输出端，成为输出功率。因此功耗极小而寿命极长，安全可靠，节能环保，效率接近lOO％，成本低，制作安装容易。