ISOP型DC/DC变换器无电流传感器均流控制研究  

Research on Current Sharing Control of Current Sensorless of the ISOP Combined DC/DC Converter

作　　者：毕洪大 韩菁 BI Hong-da;Han Jing(CRRC Dalian R ＆ D Co.,Ltd.,Dalian 116000,China)

机构地区：[1]中车大连电力牵引研发中心有限公司,辽宁大连116000

出　　处：《电力电子技术》2018年第11期79-82,共4页Power Electronics

摘　　要：DC/DC直流变换器广泛应用于铁路机车领域,所研究的输入串联输出并联(ISOP)型车载DC/DC变换器能够有效减小功率开关器件的电压应力,十分适合应用于功率大、输入电压高的场合,其关键技术问题是要保证各子模块输入侧的电压均压,同时还要确保各模块输出侧的电流均流。通过建立系统模型对ISOP型DC/DC变换器输入侧电压的均压控制和输出侧电流的均流控制之间的关系进行了深入分析研究。提出了一种无需输出电流传感器便可实现输入均压、输出侧电流均流的闭环解耦控制策略。同时引入了交错控制方式,实现了输出电流纹波相互抵消的效果,并通过Matlab仿真软件进行仿真验证,最后研制了一台应用于地铁车辆的ISOP型DC/DC变换器样机进一步验证控制策略的有效性。Input-series output-parallel（ISOP） DC/DC converter can reduce the voltage stress of all switches.The key problem of reliable operation for this circuit topology structure is how to realize the input voltage sharing and the out- put current sharing.The relationship is analyzed between voltage sharing and current sharing of the ISOP DC/DC converter, and a kind of control strategy of input voltage feedforward and output voltage closed loop without output current sensor is put forward.The method can realize input voltage and output voltage decoupling control.At the same time, the canceling effect of the current wave reduces the filter capacitor for the interleaving control, the simulation results with Matlab simulation software are presented to verify the effectiveness of the proposed method.Finally,an ISOP DC/DC converter for metro vehicles is made to verify the effectiveness of the control strategy.

关 键 词：变换器 输入串联输出并联 均压控制 均流控制 

分 类 号：TM46[电气工程—电器]