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Deep flux weakening control strategy for IPMSM with variable direct axis current limitations

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Abstract

To realize the smooth transition from the partial flux weakening zone I (FW-I Zone) to the deep flux weakening zone II (FW-II Zone) and avoid the current loop saturation during the deep flux weakening control for an interior permanent magnet synchronous motor, a novel deep flux weakening control strategy with variable direct axis (d-axis) current limitation (VDL-FWC) is proposed. In the framework of the traditional voltage closed-loop feedback regulation flux weakening control (FB-FWC) strategy, the d-axis flux weakening current is limited by the maximum torque per voltage, which is quickly obtained through a parabolic approximation that varies with the quadrature axis (q-axis) current. Therefore, when the d-axis weakening current exceeds its limitation, a closed-loop voltage feedback proportional-integral controller is used to adjust the q-axis current increment, which transfers the exceeding d-axis current to the q-axis current to prevent voltage saturation. This process helps the current loop avoid becoming out of control. The proposed deep flux weakening control strategy is compared with the FB-FWC strategy and flux weakening control strategy with a fixed direct d-axis current limitation (FDL-FWC). Studies show that the proposed strategy is effective and has a higher load capacity in the deep flux weakening zone.

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Funding

This work was supported in part by Yunnan Ten Thousand Talents Plan Young and Elite Talents Project (Grant No. KKRD201902062), in part by National Science Foundation of China (Grant No. 51567012).

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Authors and Affiliations

  1. Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming, 650500, China

    Renxin Xiao, Shuai Peng & Guisheng Chen

  2. Yunnan Petro-China Kunlun Gas Co., Ltd, Kunming, 650000, China

    Zhiqiang Huang

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  1. Renxin Xiao
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  2. Shuai Peng
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  4. Guisheng Chen
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Correspondence to Guisheng Chen.

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Xiao, R., Peng, S., Huang, Z. et al. Deep flux weakening control strategy for IPMSM with variable direct axis current limitations. Electr Eng 104, 3425–3434 (2022). https://doi.org/10.1007/s00202-022-01557-w

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  • DOI: https://doi.org/10.1007/s00202-022-01557-w

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