新型多重载波无死区SPWM

发布时间：2018-05-01 10:18

本文选题：多重载波 + 死区效应　；参考：《中国电机工程学报》2014年12期

【摘要】：传统正弦脉宽调制(sinusoidal pulse width modulation,SPWM)加入死区后会产生逆变器输出电压能力下降、出现相位偏差和电流波形畸变等问题。为了改善逆变器交流侧电流输出波形,解决传统SPWM加入死区后出现的问题,提出一种新型多重载波无死区SPWM调制方法,该方法对调制波采用多重载波调制,产生多路驱动信号,并把电流矢量变换到dq轴进行滤波,根据滤波后电流的方向,采用简单的逻辑运算确定开关管的驱动信号,实现无死区效应的调制方法。该调制方法解决了传统SPWM+死区方法中死区效应导致波形畸变的问题,从根本上解决了死区问题,逆变交流侧输出波形不畸变,正弦度良好。通过理论分析和实验验证该方法的正确性。
[Abstract]:The traditional sinusoidal pulse width modulationsSPWM) will cause the output voltage capacity of the inverter to decrease, the phase deviation and the current waveform distortion when it is added into the dead zone. In order to improve the output waveform of AC side current of inverter and solve the problem of adding dead-time to traditional SPWM, a new multi-carrier dead-time SPWM modulation method is proposed. The method uses multi-carrier modulation to generate multi-channel driving signal. The current vector is transformed to the dq axis for filtering. According to the direction of the filtered current, the driving signal of the switch is determined by simple logic operation, and the modulation method without dead-time effect is realized. This modulation method solves the problem of waveform distortion caused by dead-time effect in traditional SPWM dead-zone method, and fundamentally solves the dead-time problem. The output waveform of inverter AC side is not distorted and the sinusoidal degree is good. The correctness of the method is verified by theoretical analysis and experiments.
【作者单位】：东北大学信息科学与工程学院;
【基金】：国家自然科学基金项目(60974141,61273010) 辽宁省自然科学基金项目(20092007)~~
【分类号】：TM464

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