CPS-SPWM级联H桥激励的变压器铁耗快速计算方法  

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

作　　者：张新生[1] 王瑞田[1] 肖飞[1] 任强[1] 谢沁园 ZHANG Xinsheng;WANG Ruitian;XIAO Fei;REN Qiang;XIE Qinyuan(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《西南交通大学学报》2024年第3期581-589,599,共10页Journal of Southwest Jiaotong University

基　　金：电磁能技术全国重点实验室资助课题(614221722030201)

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%.Aiming at the transformer fed by cascaded H-bridges with carrier phase-shifted(CPS)sinusoidal pulsewidth modulation(SPWM),a fast method is proposed to calculate the iron loss on the basis of the classical loss separation model.Firstly,the lumped duty cycle of the SPWM voltage waveform is defined,and the analytical model for modulation ratio is derived.Secondly,based on the classical loss separation model and the lumped duty cycle,the iron loss calculation model is built for CPS-SPWM cascaded H-bridge.The method can directly use the modulation ratio,DC bus voltage,and other parameters to calculate the iron loss,thus avoiding the harmonic analysis or numerical integration process in conventional methods.Then,based on the proposed iron loss model,an equivalent simulation method is proposed for the iron loss under the SPWM voltage excitation.With this method,the relative error of iron loss is less than 3.6%and the used time is reduced by 74.5%.Finally,the proposed method is verified by experiments and the maximum calculation error of iron loss is less than 7.6%.

关 键 词：载波移相正弦脉宽调制 级联H桥 变压器 硅钢片 铁耗 

分 类 号：TM275[一般工业技术—材料科学与工程]