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矿用宽输入电压范围级联变换器设计

刘扬清 周远

刘扬清,周远. 矿用宽输入电压范围级联变换器设计[J]. 工矿自动化,2022,48(5):123-127.  doi: 10.13272/j.issn.1671-251x.2021100013
引用本文: 刘扬清,周远. 矿用宽输入电压范围级联变换器设计[J]. 工矿自动化,2022,48(5):123-127.  doi: 10.13272/j.issn.1671-251x.2021100013
LIU Yangqing, ZHOU Yuan. Design of mine cascade converter with wide input voltage range[J]. Journal of Mine Automation,2022,48(5):123-127.  doi: 10.13272/j.issn.1671-251x.2021100013
Citation: LIU Yangqing, ZHOU Yuan. Design of mine cascade converter with wide input voltage range[J]. Journal of Mine Automation,2022,48(5):123-127.  doi: 10.13272/j.issn.1671-251x.2021100013

矿用宽输入电压范围级联变换器设计

doi: 10.13272/j.issn.1671-251x.2021100013
基金项目: 中国煤炭科工集团有限公司科技创新创业资金专项资助项目(2021-TD-ZD004)。
详细信息
    作者简介:

    刘扬清(1993—),男,重庆人,助理工程师,硕士,主要从事智慧矿山工程设计和工程管理工作,E-mail:1162241237@qq.com

  • 中图分类号: TD60

Design of mine cascade converter with wide input voltage range

  • 摘要: 针对目前用于电源的变换器电压增益低、功率管电压应力大、电气非隔离、控制复杂等问题,为满足煤矿 AC127~1 140 V供电电压等级,设计了一种矿用宽输入电压范围级联变换器,能够自适应AC70~1 400 V电压输入。该变换器采用3路Buck变换器与LLC变换器串联方式提高变换器电压增益;采用电容串联分压方式降低功率管电压应力;Buck变换器采用输入电压前馈补偿降低输入电压波动影响,同时通过输出电压闭环PI调节以提高变换器稳定性;LLC变换器具有输入输出电气隔离性能,采用脉冲频率调制技术对输出电压进行闭环PI调节,再通过压控振荡器对功率管进行变频驱动,调节变换器谐振频率,从而稳定输出电压。仿真和实验结果表明,在输入电压为AC70~1 400 V时,变换器负载效应在5%以内,输出电压偏离值在5%以内,满足MT/T 408—1995《煤矿用直流稳压电源》要求。

     

  • 图  1  矿用宽输入电压范围级联变换器拓扑结构

    Figure  1.  Topology of mine cascaded converter with wide input voltage range

    图  2  Buck变换器控制原理

    Figure  2.  Control principle of Buck converter

    图  3  LLC变换器控制原理

    Figure  3.  Control principle of LLC converter

    图  4  负载突变时输出电压和电流仿真波形

    Figure  4.  Output voltage and current simulation waveforms under load mutation

    图  5  输入电压AC70 V时功率管驱动实验波形

    Figure  5.  Power tube drive experimental waveforms under input voltage AC70 V

    图  6  输入电压AC70 V时输出电压和电流波形

    Figure  6.  Output voltage and current waveforms under input voltage AC70 V

    图  7  输入电压AC1 400 V时功率管驱动实验波形

    Figure  7.  Power tube drive experimental waveforms under input voltage AC1 400 V

    图  8  输入电压AC1 400 V时输出电压和电流波形

    Figure  8.  Output voltage and current waveforms under input voltage AC1 400 V

    表  1  矿用宽输入电压范围级联变换器参数

    Table  1.   Parameters of mine cascaded converter with wide input voltage range

    参数数值参数数值
    输入电压/V70~1 400LLC变换器漏磁电感/μH12
    输出电压/V35LLC变换器励磁电感/μH1.3
    额定功率/W200LLC变换器谐振电容/μF1
    Buck变换器电感/mH1LLC变换器输出电容/μF1 000
    Buck变换器电容/μF1 000变压器匝比2∶3∶3
    IGBT开关频率/kHz35LLC变换器PI调节器
    比例系数
    65
    Buck变换器PI调节器比例系数15LLC变换器PI调节器
    积分系数
    1
    Buck变换器PI调节器积分系数2LLC变换器压控振荡器
    转换精度比例因数
    8
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-12
  • 修回日期:  2022-04-25
  • 网络出版日期:  2022-03-05

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