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CPS-SPWM级联H桥激励的变压器铁耗快速计算方法

张新生 王瑞田 肖飞 任强 谢沁园

张新生, 王瑞田, 肖飞, 任强, 谢沁园. CPS-SPWM级联H桥激励的变压器铁耗快速计算方法[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20210789
引用本文: 张新生, 王瑞田, 肖飞, 任强, 谢沁园. CPS-SPWM级联H桥激励的变压器铁耗快速计算方法[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20210789
ZHANG Xinsheng, WANG Ruitian, XIAO Fei, REN Qiang, XIE Qinyuan. Fast Calculation Method for Iron Loss of Transformer Fed by Cascaded H-Bridges with CPS-SPWM[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20210789
Citation: ZHANG Xinsheng, WANG Ruitian, XIAO Fei, REN Qiang, XIE Qinyuan. Fast Calculation Method for Iron Loss of Transformer Fed by Cascaded H-Bridges with CPS-SPWM[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20210789

CPS-SPWM级联H桥激励的变压器铁耗快速计算方法

doi: 10.3969/j.issn.0258-2724.20210789
详细信息
    作者简介:

    张新生(1992—),男,讲师,研究方向为磁性元件建模与设计,E-mail:marvinzxs@163.com

    通讯作者:

    王瑞田(1987—),男,副研究员,研究方向为大容量电能变换,E-mail:wangrt4321@163.com

  • 中图分类号: TM275

Fast Calculation Method for Iron Loss of Transformer Fed by Cascaded H-Bridges with CPS-SPWM

  • 摘要:

    针对载波移相(CPS)正弦脉宽调制(SPWM)级联H桥激励的变压器,提出一种基于经典损耗分离模型的铁耗快速计算方法. 首先,结合SPWM电压波形特征定义集总占空比,并推导其关于调制比的解析模型;其次,基于经典损耗分离模型和集总占空比,构建CPS-SPWM级联H桥的铁耗计算模型,该方法可以直接使用调制比、直流母线电压等参数对铁耗进行计算,从而避免传统方法中的谐波分析或者数值积分过程;再次,基于本文铁耗计算模型,提出了一种针对SPWM电压激励的有限元(FEM)仿真等效方法,最后,通过实验验证了本文计算方法的有效性. 研究结果表明:等效仿真铁耗误差小于3.6%、仿真用时减少74.5%;最大铁耗计算误差为7.6%.

     

  • 图 2  两级级联H桥逆变器拓扑

    Figure 2.  Topology of two-stage cascaded H-bridge convertor

    图 1  铁耗测量数据与回归曲线

    Figure 1.  Iron loss measurement data and regression curves

    图 3  两级级联H桥工作模式示意

    Figure 3.  Operating modes of two-stage cascaded H-bridges

    图 4  三电平SPWM电压和磁密波形示意

    Figure 4.  Waveforms of 3-level SPWM voltage and flux density

    图 5  五电平SPWM电压和磁密波形示意

    Figure 5.  Waveforms of 5-level SPWM voltage and flux density

    图 6  载波周期内脉冲电压

    Figure 6.  Voltage pulses in carrier period

    图 7  集总占空比和铁耗模型的数值验证

    Figure 7.  Numerical verification of lumped duty cycle and iron loss model

    图 8  FEM仿真模型

    Figure 8.  FEM simulation model

    图 9  仿真与解析模型结果对比

    Figure 9.  Comparison between simulation and analytical results

    图 10  三电平SPWM电压和等效电压

    Figure 10.  Three-level SPWM voltage and equivalent voltage

    图 11  仿真电压和损耗波形对比(第4组,M=0.8)

    Figure 11.  Comparison between simulated voltage and loss waveforms (the 4th group, M=0.8)

    图 12  SPWM激励和等效激励仿真结果对比

    Figure 12.  Comparison of simulation results under SPWM voltage excitation and under equivalent voltage excitation

    图 13  实验平台

    Figure 13.  Experimental platform

    图 14  实验电压和电流波形

    Figure 14.  Waveforms of experimental voltage and current

    图 15  SPWM铁耗计算值与实验值对比

    Figure 15.  Comparison between calculated and simulated results of iron loss under SPWM voltage excitation

    图 16  不同调制比下的铁耗对比

    Figure 16.  Comparison between iron losses under different modulation ratios

    图 17  不同载波频率下的铁耗

    Figure 17.  Iron losses under different carrier frequencies

    表  1  损耗分离模型系数

    Table  1.   Coefficients of iron loss models

    公式 a b/×10−5 c/×10−4 x MRE/%
    式(1) 0.0203 1.223 4.894 1.972 4.8
    式(2) 0.0233 2.964 1.796 5.6
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出版历程
  • 收稿日期:  2021-10-12
  • 修回日期:  2022-03-09
  • 网络出版日期:  2024-03-20

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