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Effective Power Signal Filtering using LC Filters with Air Core Coils

机译：使用带有空心线圈的LC滤波器进行有效的电源信号滤波

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摘要

Computer controlled power supplies are usually expensive when high performance (power, wide voltage range, low ripple factor and low response time) are required. This paper presents a simple and effective computer controlled DC system based on a commercial V/f inverter combined with a three-phase bridge rectifier and a LC power filter. Because of the widely variable frequency range of the V/f inverter when a wide range of voltage is required, amorphous or ferromagnetic core coils are avoided, and air core coils become an excellent solution to implement the filter and increase the efficiency of the power system. The proposed method for designing the LC filter is based on the full dynamic model of the filter-load set and the selection of the desired poles of the system according to the load to be coupled. The proposed topology lets obtain good time responses (setting time less than 100 ms) and good ripple factor (less than 1%) without any overshooting, even when low voltage output is required.
机译：当需要高性能（电源，宽电压范围，低纹波系数和低响应时间）时，计算机控制的电源通常很昂贵。本文提出了一种简单有效的计算机控制直流系统，该系统基于商用V / f逆变器，并结合了三相桥式整流器和LC电源滤波器。由于当需要大范围的电压时，V / f逆变器的频率范围变化很​​大，因此可以避免使用非晶或铁磁芯线圈，并且空芯线圈成为实现滤波器并提高电力系统效率的绝佳解决方案。设计LC滤波器的建议方法基于滤波器负载集的完整动态模型，并根据要耦合的负载选择系统的所需极点。所提出的拓扑结构即使在需要低电压输出的情况下，也能获得良好的时间响应（设置时间小于100 ms）和良好的纹波系数（小于1％），而不会产生任何过冲。

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