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首页> 外文期刊>IEEE Transactions on Industry Applications >Control of Three-Phase Inverter for AC Motor Drive With Small DC-Link Capacitor Fed by Single-Phase AC Source
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Control of Three-Phase Inverter for AC Motor Drive With Small DC-Link Capacitor Fed by Single-Phase AC Source

机译：单相交流电源馈电的小型直流环节电容器控制交流电动机三相逆变器

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摘要

If a small dc-link capacitor is used in the dc link fed by a single-phase ac source, then the dc-link voltage severely fluctuates at twice of the source frequency. To handle this fluctuation, the concept of “average voltage constraint” is proposed in this study. On the basis of this concept, a flux-weakening scheme, generating the $d$-axis current reference $({i_{ds}^{r}}^{ast})$ for the interior permanent-magnet synchronous machine, is devised. The $q$-axis current reference $({i_{qs}^{r}}^{ast})$ is modified for the unity power factor operation in the viewpoint of an ac source without an additional sensor. The proposed scheme has been applied to the inverter-driven 1-kW compressor of an air conditioner. From the experimental results, it has been verified that the compressor operates well at the required operating condition, regardless of the severe fluctuation of dc-link voltage, because of the reduced dc-link capacitance. The frequency spectrum of the ac source current reveals that the harmonics of the source current meet the regulation of IEC 61000-3-2 Class A and that the overall power factor is above 96% without any additional circuit, such as an input filter and a power factor correction circuit.
机译：如果在单相交流电源馈送的直流链路中使用小型直流链路电容器，则直流链路电压会以电源频率的两倍剧烈波动。为了应对这种波动，本研究提出了“平均电压约束”的概念。基于此概念，为内部永磁同步电机生成$ d $轴电流参考$（{i_ {ds} ^ {r}} ^ {ast}）$的磁通减弱方案是设计。在没有附加传感器的交流电源的角度上，针对单位功率因数操作修改了$ q $轴电流参考$（{i_ {qs} ^ {r}} ^ {ast}）$。提议的方案已应用于空调的逆变器驱动的1kW压缩机。从实验结果可以证明，由于直流母线电容的减小，无论直流母线电压的剧烈波动如何，压缩机都能在要求的工况下良好运行。交流电源电流的频谱表明，电源电流的谐波符合IEC 61000-3-2 Class A的规定，并且在没有任何附加电路（例如输入滤波器和整流器）的情况下，总功率因数高于96％。功率因数校正电路。

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