In this paper,new SVPWM switching sequences for six-phase asymmetrical induction motor drives are derived with the aim to reduce inverter’s switching losses.Total three switching sequences are introduced in this pape...In this paper,new SVPWM switching sequences for six-phase asymmetrical induction motor drives are derived with the aim to reduce inverter’s switching losses.Total three switching sequences are introduced in this paper.These sequences are derived such that the phases get continuously clamped when a current of the phases is around its peak magnitude and hence reduced switching losses are recorded.The comparative performances of these modulation techniques are studied with two existing switching sequences.Simulation,analytical and experimental results are presented.Based on these results,it is found that new switching sequences reduce switching losses effectively in dual three phase inverters.展开更多
针对非理想电网电压不对称并含有低次谐波成分,使三相脉冲宽度调制（PWM）整流器的电网电流不对称且严重畸变而影响其正常运行的问题,提出一种PI＋多谐振控制的电流控制方法。首先建立了PWM整流器旋转坐标系下的数学模型,并分析了非理...针对非理想电网电压不对称并含有低次谐波成分,使三相脉冲宽度调制（PWM）整流器的电网电流不对称且严重畸变而影响其正常运行的问题,提出一种PI＋多谐振控制的电流控制方法。首先建立了PWM整流器旋转坐标系下的数学模型,并分析了非理想三相电网电压在旋转坐标系下的特性,然后在传统电压、电流双闭环控制的基础上,提出在电流控制环路的PI控制器上叠加多谐振控制的方法,以实现电网电流谐波的抑制和三相电流平衡控制,给出了各电流控制器的参数设计方案,进而分析了提出的控制策略的鲁棒性。最后针对10 k W的PWM整流器平台,进行了非理想电网下的仿真和实验验证。结果表明,该方法能大幅改善非理想电网电压下整流器的网侧电流质量。展开更多
文摘In this paper,new SVPWM switching sequences for six-phase asymmetrical induction motor drives are derived with the aim to reduce inverter’s switching losses.Total three switching sequences are introduced in this paper.These sequences are derived such that the phases get continuously clamped when a current of the phases is around its peak magnitude and hence reduced switching losses are recorded.The comparative performances of these modulation techniques are studied with two existing switching sequences.Simulation,analytical and experimental results are presented.Based on these results,it is found that new switching sequences reduce switching losses effectively in dual three phase inverters.
文摘针对非理想电网电压不对称并含有低次谐波成分,使三相脉冲宽度调制（PWM）整流器的电网电流不对称且严重畸变而影响其正常运行的问题,提出一种PI＋多谐振控制的电流控制方法。首先建立了PWM整流器旋转坐标系下的数学模型,并分析了非理想三相电网电压在旋转坐标系下的特性,然后在传统电压、电流双闭环控制的基础上,提出在电流控制环路的PI控制器上叠加多谐振控制的方法,以实现电网电流谐波的抑制和三相电流平衡控制,给出了各电流控制器的参数设计方案,进而分析了提出的控制策略的鲁棒性。最后针对10 k W的PWM整流器平台,进行了非理想电网下的仿真和实验验证。结果表明,该方法能大幅改善非理想电网电压下整流器的网侧电流质量。
