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	SVPWM逆变电源电流采样方法的比较
	耿华 ; 于艾 ; 杨耕 ; GENG Hua ; YU Ai ; YANG Geng
	2010-07-19 ; 2010-07-19
关键词	逆变器 脉宽调制 采样 inverter PWM sampling TM464
其他题名	Comparison of Methods for Current Sampling in SVPWM Inverter
中文摘要	电流闭环控制系统中,因电流反馈值的谐波分量而导致转矩脉动,降低了系统的稳定性和控制精度。本文通过仿真和实验比较了采用SVPWM(Space Vector Pulse Width Modulation)逆变电源供电时,系统的3种电流采样方法。结果表明,在PWM波各开关周期的起点或中点时刻,对电机的电流进行采样,能够获得谐波成分相对较少的基波电流值,有利于实现高精度的电流闭环控制。; In closed loop current control systems,such as VC (Vector control) or DTC (Direct Torque Control) drive system,the performance is influenced by the property of the current sampling.Harmonic components in the feedback cur-rent which is sampled by current sensor will generate torque ripples in the torque loop and degrade stability and control precision of the system.In this paper,three methods for current sampling of the closed loop current control systems sup-plied by SVPWM (Space Vector Pulse-width modulation) inverter are compared:current sampling asynchronous with the on-off cycle of PWM (Pulse Width Modulation) wave;current sampling at the start point of each PWM on-off cycle;cur-rent sampling at the midpoint of each PWM on-off cycle.Both the results of simulation and experiment indicate that sam-pling at the start point or midpoint of each on-off cycle can achieve an ideal fundamental current wave with few harmonic components.This method can help to implement a high-precise closed loop current control.Also it can be used in other dif-ferent systems supplied by PWM inverter with moderate or small capacity,fixed PWM on-off cycle and high carrier wave ratio,such as alternate asynchronous or synchronous drive systems,APF (Active Power Filter) etc.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/76447]
专题	清华大学
推荐引用方式 GB/T 7714	耿华,于艾,杨耕,等. SVPWM逆变电源电流采样方法的比较[J],2010, 2010.
APA	耿华,于艾,杨耕,GENG Hua,YU Ai,&YANG Geng.(2010).SVPWM逆变电源电流采样方法的比较..
MLA	耿华,et al."SVPWM逆变电源电流采样方法的比较".(2010).

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