错时采样空间矢量调制技术的频域数学分析  

MATHEMATICS ANALYSIS IN FREQUENCY DOMAIN FOR SAMPLE TIME STAGGERED SPACE VECTOR MODULATION TECHNIQUE

作　　者：王立乔[1] 胡长生[1] 张仲超[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2004年第2期26-31,共6页Automation of Electric Power Systems

摘　　要：错时采样空间矢量调制是一种新型的开关调制策略,能够在较低的器件开关频率下实现较高等效开关频率的效果,具有良好的谐波特性。文中以不连续脉宽调制为例,首先将其调制波显化,并通过双重傅里叶交换得到其频域数学模型。在此基础上,推导了错时采样空间矢量调制技术的频域数学模型,从而在理论上证明该技术能够大大提高装置的等效开关频率,同时没有基波损失。这个结论普遍适用于各种载波脉宽调制技术。仿真和实验验证了理论分析结果。Sample time staggered space vector modulation (STS-SVM) technique is a novel switching modulated strategy, which can acquire much high equivalent switching frequency at fairly lower device switching frequency and have excellent harmonic characteristics. Instanced by dead-band PWM, this paper proposes that its explicit modulated wave is attained and its mathematics model in frequency domain is derived by dual Fourier transforms. On the basis of work above, the mathematical model in frequency domain of STS-SVM is deduced. The advantages of this technique are illustrated by theoretical analysis in greatly improving the equivalent switching frequency without fundamental frequency losses. The simulation and experiment validate the analysis results.

关 键 词：错时采样空间矢量调制 不连续脉宽调制 双重傅里叶变换 频域数学模型 

分 类 号：TN76[电子电信—电路与系统]