摘要
针对双三相电机谐波问题严重带来的噪声问题,提出了一种混合式脉宽调制技术。该调制技术在传统连续型最大四矢量空间矢量脉宽调制(SVPWM)算法的基础上进行改进,把4种零矢量进行有效利用和有效矢量时序重新分配,并将此改进型SVPWM方法与周期频率调制方法相结合,提出一种新型混合式脉宽调制技术。与传统连续型最大四矢量调制方式相比,该调制技术在保证双三相电机矢量控制运行性能的前提下,以仅增加一次的开关次数为代价,使开关频率及其整数倍谐波含量分布更加均匀,显著降低了相电流的高频谐波幅值,同时还将z1-z2谐波子平面谐波幅值波动进行了大幅度抑制。所提方法既不会改变基波的特性,也不会在驱动器中使用额外的电路,最后仿真结果验证了所提策略的有效性。
Aiming at the noise caused by the serious harmonic problem of dual three-phase motor, a hybrid pulse width modulation technology is proposed. This modulation technology is improved on the traditional continuous maximum four-vector space vector pulse width modulation(SVPWM) algorithm. The four kinds of zero vectors are used effectively and the time sequence of effective vectors is redistributed. The improved SVPWM method is combined with the periodic frequency modulation method, and a new hybrid pulse width modulation technology is proposed. Compared with the traditional continuous maximum four-vectors modulation method, the modulation technology makes the distribution of switching frequency and its integral multiple harmonic content more uniform at the cost of increasing the switching times only once, and significantly reduces the high-frequency harmonic amplitude of phase current on the premise of ensuring the operation performance of vector control of dual three-phase motor. At the same time, the fluctuation of z1-z2 harmonic sub plane harmonic amplitude is suppressed greatly. The proposed method neither changes the fundamental wave characteristics nor uses additional circuits in the driver. Finally, the effectiveness of the proposed strategy is verified by simulation.
作者
刘伽
张志锋
孙全增
LIU Jia;ZHANG Zhifeng;SUN Quanzeng(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《电机与控制应用》
2022年第10期10-19,共10页
Electric machines & control application
基金
国家自然科学基金(61603263)。
关键词
双三相电机
谐波抑制
改进型空间矢量脉宽调制
周期频率调制
混合式脉宽调制技术
dual three-phase motor
harmonic suppression
improved space vector pulse width modulation
periodic frequency modulation
hybrid pulse width modulation technology
