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A Time-Decoupled PWM Implementation Architecture Based on Predictive Duty-Cycle Sequences for High-Switching-Frequency Three-Phase Buck Rectifiers.

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Title: A Time-Decoupled PWM Implementation Architecture Based on Predictive Duty-Cycle Sequences for High-Switching-Frequency Three-Phase Buck Rectifiers.
Authors: Ding, Li1 (AUTHOR), Zhou, Dehong1,2 (AUTHOR) dhzhou@uestc.edu.cn, Feng, Siping1,2 (AUTHOR), Zou, Jianxiao1,2 (AUTHOR)
Source: Energies (19961073). Sep2026, Vol. 19 Issue 17, p4213. 27p.
Subject Terms: *Pulse width modulation, *Converters (Electronics), *Digital control systems
Abstract: High-switching-frequency operation substantially reduces the available time for sampling, control computation, modulation mapping, PWM-register updating, and auxiliary interrupt operations in digitally controlled three-phase buck rectifiers. Given this, this paper presents a time-decoupled PWM implementation architecture (TD-PWM) based on predictive duty-cycle sequences that enables sufficient computational redundancy. In the proposed architecture, the sampled information is used to generate an N-element duty-cycle sequence for the following control period. The generated sequence is stored in a buffer and subsequently loaded into the PWM registers one element per switching period. Consequently, prediction, control calculation, and SVPWM mapping are performed at the control frequency, whereas the duty-cycle values are updated at the switching frequency. A two-timescale execution structure is implemented in which the control-period task performs sampling and sequence generation, while the high-priority switching-period task performs sequence indexing and PWM-register loading. Experimental validation is conducted on a 400 W three-phase buck-rectifier prototype with a switching frequency of 100 kHz, a control frequency of 20 kHz, and N = 5. Under the investigated operating conditions, the proposed architecture achieves an input-current THD of 2.06% and shorter measured settling times than the two reference implementations. The results demonstrate the feasibility of the proposed implementation architecture. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 197040694
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: A Time-Decoupled PWM Implementation Architecture Based on Predictive Duty-Cycle Sequences for High-Switching-Frequency Three-Phase Buck Rectifiers.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Ding%2C+Li%22">Ding, Li</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Dehong%22">Zhou, Dehong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> dhzhou@uestc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Feng%2C+Siping%22">Feng, Siping</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zou%2C+Jianxiao%22">Zou, Jianxiao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Sep2026, Vol. 19 Issue 17, p4213. 27p.
– Name: Subject
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  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Pulse+width+modulation%22">Pulse width modulation</searchLink><br />*<searchLink fieldCode="DE" term="%22Converters+%28Electronics%29%22">Converters (Electronics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Digital+control+systems%22">Digital control systems</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High-switching-frequency operation substantially reduces the available time for sampling, control computation, modulation mapping, PWM-register updating, and auxiliary interrupt operations in digitally controlled three-phase buck rectifiers. Given this, this paper presents a time-decoupled PWM implementation architecture (TD-PWM) based on predictive duty-cycle sequences that enables sufficient computational redundancy. In the proposed architecture, the sampled information is used to generate an N-element duty-cycle sequence for the following control period. The generated sequence is stored in a buffer and subsequently loaded into the PWM registers one element per switching period. Consequently, prediction, control calculation, and SVPWM mapping are performed at the control frequency, whereas the duty-cycle values are updated at the switching frequency. A two-timescale execution structure is implemented in which the control-period task performs sampling and sequence generation, while the high-priority switching-period task performs sequence indexing and PWM-register loading. Experimental validation is conducted on a 400 W three-phase buck-rectifier prototype with a switching frequency of 100 kHz, a control frequency of 20 kHz, and N = 5. Under the investigated operating conditions, the proposed architecture achieves an input-current THD of 2.06% and shorter measured settling times than the two reference implementations. The results demonstrate the feasibility of the proposed implementation architecture. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.3390/en19174213
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 27
        StartPage: 4213
    Subjects:
      – SubjectFull: Pulse width modulation
        Type: general
      – SubjectFull: Converters (Electronics)
        Type: general
      – SubjectFull: Digital control systems
        Type: general
    Titles:
      – TitleFull: A Time-Decoupled PWM Implementation Architecture Based on Predictive Duty-Cycle Sequences for High-Switching-Frequency Three-Phase Buck Rectifiers.
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            NameFull: Ding, Li
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            NameFull: Zhou, Dehong
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            NameFull: Feng, Siping
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          Dates:
            – D: 01
              M: 09
              Text: Sep2026
              Type: published
              Y: 2026
          Identifiers:
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              Value: 19961073
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              Value: 19
            – Type: issue
              Value: 17
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            – TitleFull: Energies (19961073)
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