基于PWM逆变器的LC滤波器

作者：俞杨威，金天均，谢文涛，吕征宇 日期：2007-07-06/span> 浏览：5114 查看PDF文档

                                  基于PWM逆变器的LC滤波器
                                俞杨威，金天均，谢文涛，吕征宇
                          （浙江大学 电力电子研究所，浙江 杭州 310027）

摘 要：为了使脉宽调制（PWM）逆变器具有较好的输出波形，针对PWM逆变器谐波次数较高的特点，采用二阶LC低通滤波网络。从逆变器无功容量最小的角度,介绍了一种单相电压型PWM逆变器LC滤波器的设计方法，该方法综合考虑了滤波器的频率特性、功率因数等要素，根据该方法选择LC参数，可以优化滤波器性能。
关键词：脉宽调制；逆变器；LC滤波器；无功容量

                                     LC filter based on PWM inverter
                 YU Yangwei, JIN Tianjun, XIE Wentao, LV Zhengyu
(Institute of Power Electronics, Zhejiang University, Hangzhou 310027, China)

Abstract:The orders of the harmonics of PWM inverters output voltage are very high .Two orders  LC lowerpass filter net was used to get better sinusoidal output waveform. A designed approach of filter for singlephase voltagesource PWM inverter based on the minimum reactive capacity of filter was proposed. This approach considers multielement such as frequency characteristic ,power factor,etc. The performance of the filter would be optimized if the parameters of LC are choosed by the approach presented.
Key words:pulsewidth module (PWM); inverter; LC filter; reactive capacity

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