Line-modulation-based flux-weakening control for permanent-magnet synchronous machines

Line-modulation-based flux-weakening control for permanent-magnet synchronous machines
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基于线调制的永磁同步电机弱磁控制

DOI:
10.1049/iet-pel.2017.0443
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发表时间:
2018-01
影响因子:
2
通讯作者:
Cheng Ming
Cheng Ming
中科院分区:
工程技术4区
文献类型:
--
作者:
Wang Wei;Zhang Jinghao;Cheng Ming

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针对面贴式永磁同步电机,提出了一种基于线路调制的弱磁控制方法。为了评估平均直流母线电压利用率,定义了最大线路调制比,它不能是>1。如果最大调线比等于1,则电压型逆变器的电压容量得到充分利用,这意味着直流母线电压利用率达到了最大化。在没有特别声明的情况下,过调制方案不在本研究中使用。所提出的弱磁控制采用线路调制,通过将最大线路调制比调节为1,可以最大化平均直流母线电压利用率。与传统的弱磁控制相比,所提出的弱磁控制结构简单,铜耗低。这是因为所提出的弱磁控制采用的是线调制,而传统的弱磁控制通常采用的是空间矢量脉宽调制。实验结果验证了所提出的弱磁控制的有效性。
A line-modulation-based flux-weakening control is proposed for surface-mounted permanent-magnet synchronous machines. To evaluate the average dc bus voltage utilisation, the maximum line-modulation-ratio, which cannot be >1, is defined. If the maximum line-modulation-ratio is equal to 1, the voltage capacity of voltage-source-inverter is fully utilised, which means the dc bus voltage utilisation has been maximised. Without special declarations, the overmodulation scheme is not utilised in this study. The line modulation is employed in the proposed flux-weakening control, in which the average dc bus voltage utilisation can be maximised by regulating the maximum line-modulation-ratio to 1. Compared with the conventional flux-weakening control, the proposed one is simpler and its copper loss can be reduced. The reason is that the proposed flux-weakening control employs the line modulation while the conventional flux-weakening control usually adopts the space vector pulse width modulation. The effectiveness of the proposed flux-weakening control is verified by experimental results.
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