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一种采用虚拟磁链模型预测的新型PWM算法

DOI: 10.13334/j.0258-8013.pcsee.2015.03.023, PP. 688-694

Keywords: 脉宽调制,模型预测,虚拟磁链,单目标优化,多目标优化

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Abstract:

针对变流器脉宽调制(pulse-widthmodulation,PWM),基于虚拟磁链的模型预测,提出一种新型脉宽调制算法(novelalgorithmofpulse-widthmodulation,NPWM)。建立由正弦调制电压和变流器输出电压构成的虚拟磁链模型,以磁链误差最小为优化目标建立价值函数,采用模型预测获取最优目标电压矢量。基于单一目标预测方法,提出一种多目标预测方案,确保在磁链误差范围一定的前提下降低器件平均开关频率,依据建立的价值函数分析算法流程。仿真和实验比较两种预测算法下NPWM调制和空间矢量脉宽调制的控制效果,验证两种预测方法下NPWM算法的有效性。

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