电测与仪表2012，Vol.49Issue(8)：14-17,4.
电流谐波最优PWM开关角计算及数字实现
The Current Harmonic Optimal PWM (CHOPWM) Method and Its Digital Implementation
王从刚 1何凤有 1邓庆伟 1刘战 1曹晓冬1
作者信息
- 1. 中国矿业大学信息与电气工程学院,江苏徐州221008
- 折叠
摘要
Abstract
The current harmonic Optimal PWM (CHOPWM) method for three level converters operating at low switching frequency is introduced. Its basic principle and the solution of the switching angle is researched. The three -level inverter output voltage and current is analyzed using fourier series and the expression of current distortion rate is calculated. The expression of current distortion rate is regarded as a nonlinear transcendental equation and the voltage fundamental amplitude is equal to the reference voltage amplitude seen as nonlinear constraints. Then the switching angle of CHOPWM is solved by using the function of ga and fmincon function in MATLAB optimization toolbox. A simulation model was built using MATLAB software. Results of the switching angle at 250Hz switching frequency are verified. CHOPWM digital implementation is analyzed based on the TMS320F2812. The experimental results verify the availability of the scheme.关键词
变频器/电流谐波最优/开关角Key words
inverter/ current harmonics optimal/ switching angles分类
信息技术与安全科学引用本文复制引用
王从刚,何凤有,邓庆伟,刘战,曹晓冬..电流谐波最优PWM开关角计算及数字实现[J].电测与仪表,2012,49(8):14-17,4.
