整流滤波电压算法探讨

Discuss a Method to Calculate Output Voltage Value of Rectifier with Capacitance Filtering

在一些文献中,采用以锯齿波代替电容滤波整流电路输出电压波形,近似计算输出电压的平均值,这种近似计算方法是错误的.因为采用锯齿波电压违背基本定律,且推导出的电压近似平均值和RLC关系表达式与部分实际关系截然相反.给出了另一种既遵守基本定律又符合实际输出电压平均值的近似分析方法,并以实际计算结果证明了该方法的正确性.

The method is discussed to approximately calculate output voltage average value of rectifier with capacitance filtering by sawtooth wave instead of itself on some literatures. Error is pointed out since sawtooth wave voltage and basic principle back to back, and results give the expression to the relation between output voltage approximate average value and RLC turned out contrary to true partially. Another method has been given to approximately calculate output voltage average value. This result can give expression to the true relation between output voltage approximate average value and RLC correctly as well as comply with basic principle. And correctness was proved by a calculating value.