中文摘要：

逆变器等输出的PWM波在经过滤波电感进行滤波后会得到所需的正弦波,但滤波电感在滤除开关器件产生的开关频率及其高次谐波的同时,也会对基波信号产生一定的衰减。滤波电感选择的难点在于滤波效果和电感基波压降无法同时达到最佳。针对这种问题,构建一种频变电感,其对高频谐波呈现高电感值（较高的感抗）,而对基波呈现低电感值（比常规电感更低的感抗）,通过磁通补偿方式实现高频滤波效果和低频基波压降均达到最佳。最后,通过仿真,对比分析了频变电感和传统滤波电感的滤波效果,验证了频变电感方案的可行性。

英文摘要：

PWM wave of the inverter will be turned into desired sine wave after passing the filter inductor. While filtering out the switch frequency and the higher harmonics generated by the switching device, the filter inductor can also produce certain attenuation to the fundamental signal. The difficulty of the filter inductor selection is that the filtering effect and fundamental inductance drop can not simultaneously achieve the best. To solve this problem, a frequency-dependent inductance is built whose value can exhibit high inductance（higher reactance） to high-frequency harmonics and exhibit low inductance（lower than normal reactance） to fundamental. Then the high frequency filtering effect and low frequency fundamental inductance drop can simultaneously achieve the best through filtering methods with magnetic flux compensation. Finally, comparing the filtering effect of the freqUency-dependent inductance with the traditional filter inductance through simulation, the paper verifies the feasibility of the frequency-dependent inductance scheme.