摘要
分析比较了SVPWM与SPWM的基本思想、实现原理和调制函数,并在Matlab/Simulink中建立交流调速系统进行比较仿真。理论分析和仿真结果表明,两者既有区别又有联系。相比于传统SPWM,SVPWM直流电压利用率提高15.47%;相同条件下,SVPWM可获得更低的转矩波动,更低的电压谐波畸变率,在电机空间内形成更接近圆形的旋转磁场。SVPWM实质上是基于空间矢量、对在三相正弦波中注入了零序分量的调制波进行规则采样的一种变型SPWM。
In this paper, analysis and comparison of the basic idea, implementation principle as well as modulation function of space vector PWM （SVPWM） and SPWM are presented. And a model of AC speed regulating system is built in Matlab/ Simulink environment in order to conduct a comparative simulation. The theoretical analysis and simulation result demonstrate differences between SVPWM and SPWM as well as their connections. Compared with conventional SPWM, SVPWM gains a 15.47% increase in DC voltage utilization ratio. Given the same condition, SVPWM yields lower torque ripple, lower total harmonic distortion of output voltage as well as a rotating magnetic field closer to a circular in motor space. SVPWM is essentially a variant of SPWM whose modulation wave is derived by adding a zero - sequence compo nent to that of SPWM.
出处
《机械与电子》
2013年第1期3-7,共5页
Machinery & Electronics
基金
国家重点基础研究发展计划(2011CB711202)
中央高校专项资金项目
