单极性SPWM的两种控制方法与过零点输出特性比较  

Comparison of Two Monopole SPWM Control Methods and Zero Output Characteristic

作　　者：赵青[1] 范洪峰[1] 吕征宇[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电源技术应用》2004年第3期133-137,共5页Power Supply Technologles and Applications

摘　　要：对于采用 SPWM 的逆变器,其中单极性逆变方式仅用到一对高频开关,相对于双极性逆变具有损耗低、电磁干扰少等优点。分别介绍了单极性逆变中的单边与双边 SPWM 的产生方法以及各自的控制方法,分析了这两种控制方法在正弦波电压过零点附近的振荡情况,经过仿真与电路试验证明了双边 SPWM 方式性能更为优越。Comparing with bipolar SPWM inverter,the monopole SPWM inverter only uses a pair of high frequency switch and has the merits of lower loss,lower EMI and so on.The generation and control method of asymmetry SPWM and sym- metry SPWM are introduced.Furthermore the oscillation occurring on the respective zero point of the sine wave for the two control type inverters is definitely analyzed.Finally both the simulation and experimental results have proved the presented concept.

关 键 词：单极性 正弦波脉宽调制 过零点振荡 

分 类 号：TN86[电子电信—信息与通信工程]