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独立充放时序SIDO开关变换器电流型变频控制技术

贺明智 林润泽 周述晗 冯沛 李欢 王登峰

贺明智, 林润泽, 周述晗, 冯沛, 李欢, 王登峰. 独立充放时序SIDO开关变换器电流型变频控制技术[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20220535
引用本文: 贺明智, 林润泽, 周述晗, 冯沛, 李欢, 王登峰. 独立充放时序SIDO开关变换器电流型变频控制技术[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20220535
HE Mingzhi, LIN Runze, ZHOU Shuhan, FENG Pei, LI Huan, WANG Dengfeng. Current-Mode Variable Frequency Control Technique for SIDO Switching Converter with Independent Charge and Discharge Sequence[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20220535
Citation: HE Mingzhi, LIN Runze, ZHOU Shuhan, FENG Pei, LI Huan, WANG Dengfeng. Current-Mode Variable Frequency Control Technique for SIDO Switching Converter with Independent Charge and Discharge Sequence[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20220535

独立充放时序SIDO开关变换器电流型变频控制技术

doi: 10.3969/j.issn.0258-2724.20220535
基金项目: 国家自然科学基金(62101361);四川省科技计划(2021YFQ0006);湖北省重点研发计划(2022BAA098)
详细信息
    作者简介:

    贺明智(1979—),男,教授,博士,研究方向为电解制氢电力电子解决方案、电力电子变流技术、(超)大功率电力电子系统及应用,E-mail:darmyhe@vip.126.com

  • 中图分类号: TM46

Current-Mode Variable Frequency Control Technique for SIDO Switching Converter with Independent Charge and Discharge Sequence

  • 摘要:

    单电感双输出(single-inductor dual-output,SIDO)开关变换器工作在共享充放时序下存在电感电流纹波大、输出支路间交叉影响严重以及电路参数宽范围变化下控制电路不能正常工作等问题. 为此,本文提出一种独立充放时序电流型变频控制(current-mode variable frequency control, C-VF)技术. 首先,具体描述变换器在连续导电模式(continuous conduction mode,CCM)下的工作原理,并推导主电路开环传递函数;进一步构建闭环小信号模型,推导闭环交叉阻抗,详细分析不同输出电压及负载电流下变换器的交叉影响特性. 理论分析表明:相较于共享充放时序,独立充放时序C-VF CCM SIDO buck变换器减小了交叉影响,改善了负载瞬态响应性能;当两支路负载电压不等时,减轻某一支路负载可以降低该支路的交叉影响;当两支路输出电压相同但负载不同时,重载支路对轻载支路的交叉影响更小. 仿真和实验证明了上述结论的准确性.

     

  • 图 1  独立式充放时序C-VF CCM SIDO buck变换器

    Figure 1.  C-VF CCM SIDO buck converter with independent charge and discharge sequence

    图 2  工作时序

    Figure 2.  Working sequence

    图 3  独立充放时序CCM SIDO buck变换器小信号等效电路

    Figure 3.  Small signal equivalent circuit of CCM SIDO buck converter with independent charge and discharge sequence

    图 4  独立充放时序C-VF变换器电感电流波形

    Figure 4.  Inductor current waveforms of C-VF convert with independent charge and discharge sequence

    图 5  独立充放时序C-VF小信号模型

    Figure 5.  Small signal model of C-VF with independent charge and discharge sequence

    图 6  开关频率与谷值电流参考值的关系

    Figure 6.  Relationship between switching frequency and valley current reference value

    图 7  负载不同时的闭环交叉影响阻抗Bode图

    Figure 7.  Bode diagrams of closed-loop cross-regulation impedance with different loads

    图 8  独立充放时序C-VF CCM SIDO buck变换器实验装置

    Figure 8.  Experimental device of C-VF CCM SIDO buck convert with independent charge and discharge sequence

    图 9  Iv=0.5 A和Iv=1.1 A时稳态实验波形

    Figure 9.  Steady-state experimental waveforms with iv = 0.5 A and iv = 1.1 A

    图 10  负载不同、负载电压不等时ioa跳变的瞬态实验波形

    Figure 10.  Transient experimental waveforms with sudden variation of ioa under different loads and unequal load voltages

    图 11  负载不同、负载电压不等时iob跳变的瞬态实验波形

    Figure 11.  Transient experimental waveforms with sudden sudden variation of iob with different loads and unequal load voltages

    图 12  负载不同、负载电压相等时负载跳变的瞬态实验波形

    Figure 12.  Transient experimental waveforms with sudden variation of loads under different loads and equal load voltages

    图 13  负载不同、负载电压相等时负载跳变的瞬态实验波形

    Figure 13.  Transient experimental waveforms with sudden variation of loads with different loads and equal load voltages

    表  1  独立充放时序C-VF CCM SIDO buck变换器电路参数表

    Table  1.   Circuit parameters of C-VF CCM SIDO buck converter with independent charge and discharge sequence

    名称参数值名称参数值
    Vin/V20Ioa/A1
    L/μH22Iob/A1
    Voa/V12Coa/μF470
    Vob/V5Cob/μF470
    下载: 导出CSV

    表  2  不同工况下闭环交叉影响

    Table  2.   Closed-loop cross-regulation under different working conditions

    输出电压/V负载电流/A负载跳变/AFa
    Voa=12,Vob=5ioa=1.0,iob=1.0ioa:1.0→1.50.0424
    ioa=1.5,iob=1.0ioa:1.5→2.00.0720
    ioa=1.0,iob=1.0iob:1.0→1.50.0173
    ioa=1.0,iob=1.5iob:1.5→2.00.0300
    Voa=5,Vob=5ioa=1.0,iob=1.5ioa:1.0→1.50.0760
    iob:1.5→2.00.0672
    ioa=1.5,iob=1.0ioa:1.5→2.00.0606
    iob: 1.0→1.50.0812
    下载: 导出CSV

    表  3  不同SIDO变换器性能的对比

    Table  3.   Performance comparison of different SIDO converters

    文献 工作模式 输入
    电压/V
    输出电容/μF 输出
    电压/V
    输出
    功率/W
    电感/μH 开关
    频率/kHz
    电感电流纹波率 交叉影响系数 负载瞬态响应
    本文 CCM 20 470 12, 5 17.0 22 55.1 1.05 0.0128 7T
    文献 [12] CCM 12 100 24, 15 19.5 20 68.0 1.48 0.0146 142.8T
    文献 [13] CCM 12 470 24, 15 19.5 50 50.0 1.23 0.1240 215T
    文献 [14] CCM 10 470 3.3, 5 16.1 100 50.0 0.0800 28T
    下载: 导出CSV
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  • 收稿日期:  2022-08-02
  • 修回日期:  2023-01-05
  • 网络出版日期:  2023-12-19

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