混沌SVPWM策略及频谱特性分析  

Generation of Chaos-Based SVPWM and Analysis of Its Frequency Spectral Property

作　　者：陆益民[1] 张波[2] 毛宗源[3] 

机构地区：[1]广西大学电气工程学院,广西南宁530004 [2]华南理工大学电力学院,广东广州510640 [3]华南理工大学自动化科学与工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2005年第4期24-28,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目 (011652);国家自然科学基金资助项目 ( 60474066;50177009 );广西大学科研基金资助项目(DD020008)

摘　　要：基于混沌理论,提出了一种新型的空间电压矢量脉宽调制策略———CSVPWM.与开关频率固定的常规SVPWM不同,CSVPWM的开关频率按混沌映射的规律变化,从而使逆变器输出波形的谐波连续均匀分布在较宽的频带范围内,谐波峰值大为减小.对由CS VPWM电压型逆变器供电的感应电动机的仿真结果表明,电动机运行特性与常规SVP WM供电情形下相仿,同时幅值较大的电流、电压谐波能得到有效抑制.文中方法为减小由谐波引起的电磁噪声提供了一条可能的途径.A new space vector pulse-width modulation strategy, namely, CSVPWM, is proposed based on the chaos theory. Unlike the conventional SVPWM with fixed switching frequency, CSVPWM uses a chaotic changing switching frequency to spread the harmonics continuously into a wideband area, so that the peak harmonics can greatly be reduced. The proposed SVPWM scheme is then simulated on an induction motor fed by a voltage source inverter. The results show that the motor operates in a similar way as with conventional SVPWM supplying, and that larger harmonic voltage and current are effectively suppressed. The proposed method would be a new way to reduce the electromagnetic noise caused by harmonics.

关 键 词：电动机 脉宽调制 混沌 谐波 频谱特性 

分 类 号：TM301.2[电气工程—电机]