传统LC滤波器与新型阻尼滤波器的比较

输出滤波器多采用传统的LC无阻尼滤波器,该滤波器电路结构因无阻尼,在输出端极易产生振荡分量而严重影响电器性能。阻尼滤波器由于采用改进了的电路结构:用一电容与电阻串联之后与另一电容并联构成的组合电路来取代传统LC无阻尼滤波器的滤波电容,并通过计算与计算机仿真,合理选择参数,使电路具有适当阻尼比的同时,系统损耗较小,抑制振荡效果显著,增加了系统的稳定性,改善了系统的性能。将2种滤波器利用仿真进行研究分析,用实例证明新型阻尼滤波器的有效性且电路结构简单、成本低。

Comparison of LC filters and damping filters

Since its electric circuit structure has no damping,the traditional LC filter,which is normally applied to output filters,is inclined to generate oscillations at the output port.The damping filter is introduced,which replaces the capacitor C of traditional LC filter with a damping circuit of two capacitors and one resistor.Circuit parameters are set properly by calculation and simulation to ensure the output filter has both good damping effect and low power loss,which suppresses vibration and enhances system stability and performance.Analysis with simulations shows the damping filter is effective,simple and cheap.