By deriving the discrete-time models of a digitally controlled H-bridge inverter system modulated by bipolar sinu- soidal pulse width modulation （BSPWM） and unipolar double-frequency sinusoidal pulse width modulati...By deriving the discrete-time models of a digitally controlled H-bridge inverter system modulated by bipolar sinu- soidal pulse width modulation （BSPWM） and unipolar double-frequency sinusoidal pulse width modulation （UDFSPWM） respectively, the performances of the two modulation strategies are analyzed in detail. The circuit parameters, used in this paper, are fixed. When the systems, modulated by BSPWM and UDFSPWM, have the same switching frequency, the stabil- ity boundaries of the two systems are the same. However, when the equivalent switching frequencies of the two systems are the same, the BSPWM modulated system is more stable than the UDFSPWM modulated system. In addition, a convenient method of establishing the discrete-time model of piecewise smooth system is presented. Finally, the analytical results are confirmed by circuit simulations and experimental measurements.展开更多
为了缩短对大功率电子装置(如逆变电源)的研制周期和减少研制费用,借助计算机仿真技术,利用Matlab软件中Simulink和Power System B lochset建立了以IGBT(绝缘栅双极性晶体管)为开关器件具有数字PI调压功能的SPWM电压型逆变电源仿真模型...为了缩短对大功率电子装置(如逆变电源)的研制周期和减少研制费用,借助计算机仿真技术,利用Matlab软件中Simulink和Power System B lochset建立了以IGBT(绝缘栅双极性晶体管)为开关器件具有数字PI调压功能的SPWM电压型逆变电源仿真模型,对其输出特性进行仿真,并利用傅里叶快速变换(FFT)分析工具对其仿真输出电压进行谐波分析。仿真模型分别考虑了主电路和控制器模型,较为精确地反映了实际情况,验证了此模型和仿真方法的正确性,同样适用于其他电力电子线路。展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 51277146)the Foundation of Delta Science,Technologythe Education Development Program for Power Electronics (Grant No. DREG2011003)
文摘By deriving the discrete-time models of a digitally controlled H-bridge inverter system modulated by bipolar sinu- soidal pulse width modulation （BSPWM） and unipolar double-frequency sinusoidal pulse width modulation （UDFSPWM） respectively, the performances of the two modulation strategies are analyzed in detail. The circuit parameters, used in this paper, are fixed. When the systems, modulated by BSPWM and UDFSPWM, have the same switching frequency, the stabil- ity boundaries of the two systems are the same. However, when the equivalent switching frequencies of the two systems are the same, the BSPWM modulated system is more stable than the UDFSPWM modulated system. In addition, a convenient method of establishing the discrete-time model of piecewise smooth system is presented. Finally, the analytical results are confirmed by circuit simulations and experimental measurements.
文摘为了缩短对大功率电子装置(如逆变电源)的研制周期和减少研制费用,借助计算机仿真技术,利用Matlab软件中Simulink和Power System B lochset建立了以IGBT(绝缘栅双极性晶体管)为开关器件具有数字PI调压功能的SPWM电压型逆变电源仿真模型,对其输出特性进行仿真,并利用傅里叶快速变换(FFT)分析工具对其仿真输出电压进行谐波分析。仿真模型分别考虑了主电路和控制器模型,较为精确地反映了实际情况,验证了此模型和仿真方法的正确性,同样适用于其他电力电子线路。
