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A 1-kV Input SiC LLC Converter With Split Resonant Tanks and Matrix Transformers.

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Title: A 1-kV Input SiC LLC Converter With Split Resonant Tanks and Matrix Transformers.
Authors: Ren, Xiaoyong1 (AUTHOR) renxy@nuaa.edu.cn, Xu, Zhi-Wei1 (AUTHOR) xzwfred@nuaa.edu.cn, Zhang, Zhiliang1 (AUTHOR) zlzhang@nuaa.edu.cn, Li, Haoran1 (AUTHOR) haoranli1991@nuaa.edu.cn, He, Mingxie1 (AUTHOR) mingxiehe@nuaa.edu.cn, Tang, Jiachen1 (AUTHOR) tjc325@nuaa.edu.cn, Chen, Qianhong1 (AUTHOR) chenqh@nuaa.edu.cn
Source: IEEE Transactions on Power Electronics. Nov2019, Vol. 34 Issue 11, p10446-10457. 12p.
Subjects: Power density, Matrix converters, High voltages, Electric transformers, Metal oxide semiconductor field-effect transistors, Tanks, Electric capacity
Abstract: A 1-kV input SiC LLC converter with the matrix planar transformers is proposed to achieve high efficiency and high power density. With fast switching speed 140 ns of SiC mosfets at 1-kV input voltage, high dv/dt of 11.8 kV/μs can cause large displacement current via the parasitic capacitance between the primary and secondary sides of high-frequency planar transformers. The displacement current via the interwinding capacitance can distort the resonant current seriously. This causes the control mosfets not to realize ZVS and induces high switching loss at 1 kV. An LLC topology with split resonant tanks is proposed for high input voltage applications. The resonant tank is split into two identical resonant tanks to provide symmetrical resonant current with the same impedance. Compared with the conventional LLC converters, the input and output current of the resonant tank is symmetrical, avoiding the current distortion. Therefore, all of the control mosfets can realize ZVS. The transformer interwinding capacitance modeling and a reduction solution are presented, which reduces the waveform distortion by 68%. Two SiC prototypes of 3 and 4 kW with an input of 1 kV and output of 32 and 48 V were built, respectively. The efficiency is 94.9% at full load at 300 kHz for a 3-kW module and 96.0% at full load for a 4-kW module. The power density is 3.87 kW/L (63.4 W/in3) and 4.11 kW/kg for the 4-kW module. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: A 1-kV Input SiC LLC Converter With Split Resonant Tanks and Matrix Transformers.
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  Data: <searchLink fieldCode="AR" term="%22Ren%2C+Xiaoyong%22">Ren, Xiaoyong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> renxy@nuaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Zhi-Wei%22">Xu, Zhi-Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xzwfred@nuaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Zhiliang%22">Zhang, Zhiliang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zlzhang@nuaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Haoran%22">Li, Haoran</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> haoranli1991@nuaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22He%2C+Mingxie%22">He, Mingxie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mingxiehe@nuaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Tang%2C+Jiachen%22">Tang, Jiachen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> tjc325@nuaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Qianhong%22">Chen, Qianhong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chenqh@nuaa.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Power+Electronics%22">IEEE Transactions on Power Electronics</searchLink>. Nov2019, Vol. 34 Issue 11, p10446-10457. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink><br /><searchLink fieldCode="DE" term="%22Matrix+converters%22">Matrix converters</searchLink><br /><searchLink fieldCode="DE" term="%22High+voltages%22">High voltages</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+transformers%22">Electric transformers</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+oxide+semiconductor+field-effect+transistors%22">Metal oxide semiconductor field-effect transistors</searchLink><br /><searchLink fieldCode="DE" term="%22Tanks%22">Tanks</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+capacity%22">Electric capacity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A 1-kV input SiC LLC converter with the matrix planar transformers is proposed to achieve high efficiency and high power density. With fast switching speed 140 ns of SiC mosfets at 1-kV input voltage, high dv/dt of 11.8 kV/μs can cause large displacement current via the parasitic capacitance between the primary and secondary sides of high-frequency planar transformers. The displacement current via the interwinding capacitance can distort the resonant current seriously. This causes the control mosfets not to realize ZVS and induces high switching loss at 1 kV. An LLC topology with split resonant tanks is proposed for high input voltage applications. The resonant tank is split into two identical resonant tanks to provide symmetrical resonant current with the same impedance. Compared with the conventional LLC converters, the input and output current of the resonant tank is symmetrical, avoiding the current distortion. Therefore, all of the control mosfets can realize ZVS. The transformer interwinding capacitance modeling and a reduction solution are presented, which reduces the waveform distortion by 68%. Two SiC prototypes of 3 and 4 kW with an input of 1 kV and output of 32 and 48 V were built, respectively. The efficiency is 94.9% at full load at 300 kHz for a 3-kW module and 96.0% at full load for a 4-kW module. The power density is 3.87 kW/L (63.4 W/in3) and 4.11 kW/kg for the 4-kW module. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IEEE Transactions on Power Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1109/TPEL.2019.2896099
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 10446
    Subjects:
      – SubjectFull: Power density
        Type: general
      – SubjectFull: Matrix converters
        Type: general
      – SubjectFull: High voltages
        Type: general
      – SubjectFull: Electric transformers
        Type: general
      – SubjectFull: Metal oxide semiconductor field-effect transistors
        Type: general
      – SubjectFull: Tanks
        Type: general
      – SubjectFull: Electric capacity
        Type: general
    Titles:
      – TitleFull: A 1-kV Input SiC LLC Converter With Split Resonant Tanks and Matrix Transformers.
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          Name:
            NameFull: Ren, Xiaoyong
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            NameFull: Xu, Zhi-Wei
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            NameFull: Zhang, Zhiliang
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            NameFull: Li, Haoran
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            NameFull: He, Mingxie
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            NameFull: Tang, Jiachen
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            NameFull: Chen, Qianhong
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            – D: 01
              M: 11
              Text: Nov2019
              Type: published
              Y: 2019
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