正弦脉宽调制(SPWM)在逆变器调制方法中应用最为广泛。通过双重傅里叶变换建立了双极性SPWM调制方法的数学模型,引入了一种新的仿真模块。通过数学模型对双极性SPWM调制方法的输出电压的谐波特性进行了定量分析,利用PSpice/ABM模块成功...正弦脉宽调制(SPWM)在逆变器调制方法中应用最为广泛。通过双重傅里叶变换建立了双极性SPWM调制方法的数学模型,引入了一种新的仿真模块。通过数学模型对双极性SPWM调制方法的输出电压的谐波特性进行了定量分析,利用PSpice/ABM模块成功实现了逆变电路的双极性SPWM调制仿真,在实验室研制的1.5 k W单相全桥逆变器上进行了双极性SPWM调制方法的实验。通过仿真和实验结果的对比,验证了双极性SPWM调制方法的输出电压的谐波理论分析的正确性。展开更多
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
文摘正弦脉宽调制(SPWM)在逆变器调制方法中应用最为广泛。通过双重傅里叶变换建立了双极性SPWM调制方法的数学模型,引入了一种新的仿真模块。通过数学模型对双极性SPWM调制方法的输出电压的谐波特性进行了定量分析,利用PSpice/ABM模块成功实现了逆变电路的双极性SPWM调制仿真,在实验室研制的1.5 k W单相全桥逆变器上进行了双极性SPWM调制方法的实验。通过仿真和实验结果的对比,验证了双极性SPWM调制方法的输出电压的谐波理论分析的正确性。
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.
