摘要
开关电源是一种性能很好的电源，它的体积小、重量轻、功耗小、效率高、调整范围宽．但是，目前的开关电源由于直接对市电进行桥式整流电容滤波，输入电流是一串串尖窄的脉冲，因而含有丰富的谐波，使电路的功率因数变低并对电网产生污染．本文对开关电源的存在问题进行了分析，并提出了一些改进方法。
Being a kind of functional power,switch power features on its small bulk,little weight,high effect and covers a wide range of adjustment.Nowadays,Switch power is directly bridge rectifying and capactance filtering the main power,but the input electric current is a scrics of pulsc which contains rich harmonics that make the powcr factor lower and pollute the electrified wire netting.The author analyses the problems of the switch power and their solutions.
出处
《广西民族学院学报（自然科学版）》
CAS
1999年第3期15-17,共3页
Journal of Guangxi University For Nationalities(Natural Science Edition)
关键词
开关电源
谐波
畸变
功率因数
正弦波
纹波
Switch power
Harmonics
Distortion
Power factor
Sine wave
Lines wave
