基于改进平均电流控制的交错型磁耦合DC-DC变换器研究

陈东; 王磊; 赵君君

引用本文:	陈东,王磊,赵君君.基于改进平均电流控制的交错型磁耦合DC-DC变换器研究[J].电力系统保护与控制,2016,44(24):58-65.
	CHEN Dong,WANG Lei,ZHAO Junjun.Research of staggered parallel magnetic DC-DC converters based on improved average current control[J].Power System Protection and Control,2016,44(24):58-65

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基于改进平均电流控制的交错型磁耦合DC-DC变换器研究
陈东¹,王磊²,赵君君¹
(1.辽宁工程技术大学电气与控制工程学院，辽宁葫芦岛 125105;2.浙江艾罗电源有限公司，浙江杭州 310000)

摘要:

以多相交错型DC-DC变换器为研究对象，首先对变换器主电感进行磁集成研究，通过归一化等效电感分析，给出多相磁耦合电感设计准则。采用小信号对变换器Buck模式进行建模，推演出状态变量到控制变量的传递函数。然后依据三相磁耦合变换器的开环特性，并结合平均电流控制的不足，设计出对应补偿网络，提出补偿电流环的改进平均电流控制策略。最后通过仿真和实验，证明了所提出的新型控制策略，较之传统控制方式，可优化系统稳态及暂态特性。同时，磁耦合电感设计还改善了相电流纹波，提高了变换器暂态电流响应速度。

关键词: 交错并联磁耦合小信号建模改进平均电流控制

DOI：10.7667/PSPC151821

分类号:

基金项目:国家自然科学基金资助项目(51274118)

Research of staggered parallel magnetic DC-DC converters based on improved average current control

CHEN Dong¹,WANG Lei²,ZHAO Junjun¹

(1. College of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China;
;2. Zhejiang SolaX Power Co., Ltd., Hangzhou 310000, China)

Abstract:

Taking the heterogeneity interlocking DC-DC converter as the object of study, firstly, this paper conducts the magnetic integration research on the main inductance of the converter, and proposes the design criterion of the heterogeneity magnetic coupling inductance through the analysis of normalized equivalent inductance. The research conducts the model building of the Buck mode of the converter with the small-signal, and deduces the transfer function from the state variables to control variables. Secondly, based on both the open-loop features of three-phase magnetic coupling converter and the deficiency of average current control, the control strategy of the improved average current for the bucking current loop is proposed. Finally, through the simulation and experiment, it proves that the proposed new type control strategy can optimize the stable state and transient behavior of the system compared with the traditional control mode. Meanwhile, the design of the magnetic coupling inductance also improves the phase current ripple, as well as enhances the response speed of the transient current of the converter. This work is supported by National Natural Science Foundation of China (No. 51274118).

Key words: staggered parallel magnetic integration small signal modeling improved average current control

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