Guangdong Menlo Electric Power CO.,LTD is a High-tech enterprise integrating research and development, the production, the sale and the post-sale service.
Guangdong Menlo Electric Power CO.,LTD is a High-tech enterprise integrating research and development, the production, the sale and the post-sale service.
Guangdong Menlo Electric Power CO.,LTD is a High-tech enterprise integrating research and development, the production, the sale and the post-sale service.
Guangdong Menlo Electric Power CO.,LTD is a High-tech enterprise integrating research and development, the production, the sale and the post-sale service.
Guangdong Menlo Electric Power CO.,LTD is a High-tech enterprise integrating research and development, the production, the sale and the post-sale service.
滤波电容的选用原则
滤波电容用在电源整流电路中,用来滤除交流成分,使输出的直流更平滑。
选用原则:
在电源设计中,滤波电容的选取原则是: C≥2.5T/R
其中: C为滤波电容,单位为UF;
T为频率, 单位为Hz
R为负载电阻,单位为Ω
当然,这只是一般的选用原则,在实际的应用中,如条件(空间和成本)允许,都选取C≥5T/R.
如何区分电路中的滤波电容和去耦电容
电容在电路中的作用:具有隔断直流、连通交流、阻止低频的特性,广泛应用在耦合、隔直、旁路、滤波、调谐、能量转换和自动控制等。
1、滤波电容:它接在直流电压的正负极之间,以滤除直流电源中不需要的交流成分,使直流电平滑,通常采用大容量的电解电容,也可以在电路中同时并接其它类型的小容量电容以滤除高频交流电。
2、退耦电容:并接于放大电路的电源正负极之间,防止由电源内阻形成的正反馈而引起的寄生振荡。