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An Adaptive Switching Method for Sensorless Startup of High-Speed SPMSM Based on the Cosine of the Angle Error.

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Title: An Adaptive Switching Method for Sensorless Startup of High-Speed SPMSM Based on the Cosine of the Angle Error.
Authors: Chen, Wei1,2 (AUTHOR) chen_wei@tju.edu.cn, Zhang, Shiwei1,2 (AUTHOR), Wang, Zhiqiang1,3 (AUTHOR), Li, Xinmin1,4 (AUTHOR), Xiao, Shuxin1,3 (AUTHOR), Xu, Zhezhun2,4 (AUTHOR)
Source: Energies (19961073). May2026, Vol. 19 Issue 9, p2140. 18p.
Subject Terms: *Sensorless control systems, *Adaptive control systems, *Closed loop systems, *Brushless electric motors
Abstract: To address the current surge and speed fluctuation that occur when high-speed surface-mounted permanent magnet synchronous motors (HSPMSMs) switch from I-f open-loop control to sensorless closed-loop control, an adaptive switching method based on the cosine of the angle error is proposed. In this method, the angle error between the I-f open-loop reference angle and the angle estimated by the sensorless observer serves as the regulating variable, and its cosine is introduced to construct an adaptive attenuation factor, so that the rate of current reduction can vary continuously with the angle error. Specifically, a relatively large rate of current reduction is generated in the early stage of the switching process, when the angle error is large, to shorten the switching time. As the angle error decreases, the rate of current reduction is gradually lowered, allowing the current regulation process to better match the convergence process of the angle error and thereby improving switching stability. The proposed switching method is validated on a high-speed air compressor experimental platform. The experimental results show that the proposed method can shorten the switching time, reduce the current surge and speed fluctuation at switching, and exhibit good robustness under varying operating conditions. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 193716036
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: An Adaptive Switching Method for Sensorless Startup of High-Speed SPMSM Based on the Cosine of the Angle Error.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Wei%22">Chen, Wei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> chen_wei@tju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Shiwei%22">Zhang, Shiwei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhiqiang%22">Wang, Zhiqiang</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xinmin%22">Li, Xinmin</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiao%2C+Shuxin%22">Xiao, Shuxin</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Zhezhun%22">Xu, Zhezhun</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. May2026, Vol. 19 Issue 9, p2140. 18p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Sensorless+control+systems%22">Sensorless control systems</searchLink><br />*<searchLink fieldCode="DE" term="%22Adaptive+control+systems%22">Adaptive control systems</searchLink><br />*<searchLink fieldCode="DE" term="%22Closed+loop+systems%22">Closed loop systems</searchLink><br />*<searchLink fieldCode="DE" term="%22Brushless+electric+motors%22">Brushless electric motors</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To address the current surge and speed fluctuation that occur when high-speed surface-mounted permanent magnet synchronous motors (HSPMSMs) switch from I-f open-loop control to sensorless closed-loop control, an adaptive switching method based on the cosine of the angle error is proposed. In this method, the angle error between the I-f open-loop reference angle and the angle estimated by the sensorless observer serves as the regulating variable, and its cosine is introduced to construct an adaptive attenuation factor, so that the rate of current reduction can vary continuously with the angle error. Specifically, a relatively large rate of current reduction is generated in the early stage of the switching process, when the angle error is large, to shorten the switching time. As the angle error decreases, the rate of current reduction is gradually lowered, allowing the current regulation process to better match the convergence process of the angle error and thereby improving switching stability. The proposed switching method is validated on a high-speed air compressor experimental platform. The experimental results show that the proposed method can shorten the switching time, reduce the current surge and speed fluctuation at switching, and exhibit good robustness under varying operating conditions. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/en19092140
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 2140
    Subjects:
      – SubjectFull: Sensorless control systems
        Type: general
      – SubjectFull: Adaptive control systems
        Type: general
      – SubjectFull: Closed loop systems
        Type: general
      – SubjectFull: Brushless electric motors
        Type: general
    Titles:
      – TitleFull: An Adaptive Switching Method for Sensorless Startup of High-Speed SPMSM Based on the Cosine of the Angle Error.
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            NameFull: Chen, Wei
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            NameFull: Zhang, Shiwei
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            NameFull: Wang, Zhiqiang
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            NameFull: Li, Xinmin
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            NameFull: Xiao, Shuxin
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            NameFull: Xu, Zhezhun
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 19
            – Type: issue
              Value: 9
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            – TitleFull: Energies (19961073)
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