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引用本文:	夏兴国1，陈乐柱2，潘小波1，张庆丰1.基于小信号模型的新型Buck变换器补偿网络设计(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2016，33（1）：52-58
	CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435

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基于小信号模型的新型Buck变换器补偿网络设计
夏兴国1，陈乐柱2，潘小波1，张庆丰1^1,2
1.马鞍山职业技术学院电气工程系, 安徽马鞍山 243031;2.安徽工业大学电气与信息工程学院, 安徽马鞍山 243002

摘要:

对Buck变换器主电路在CCM工作模式下进行动态小信号分析，详细推导其状态方程得出小信号模型.先后设计3种闭环控制补偿网络，即PD，PID和双极点-双零点补偿网络，推导出补偿网络后系统的开环传递函数，由Matlab仿真出补偿网络补偿前后的开环传递函数的伯德图.结果表明，双极点-双零点补偿网络设计后，相角裕度为51.1°，稳态误差为0，在高频段幅频特性的下降频率为-40 dB/dec，获得了更好的稳态和动态性能，能更好地抑制高频干扰，这对研究其他开关电源有着非常好的借鉴作用.

关键词: Buck变换器补偿网络 CCM模式小信号模型双极点-双零点

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Design of a Novel Buck Converter Compensation Network Based on Small Signal Model

XIA Xing guo1, CHEN Le zhu2, PAN Xiao bo1, ZHANG Qing feng1

Abstract:

The main circuit of Buck converter is analyzed in CCM mode, and the small signal model is derived in detail. Three kinds of closed loop control compensation networks have been designed and named PD, PID and the “double pole and double zero” compensation networks. This paper derived the system of the open loop transfer function after compensation network, and simulated the Bode plot of the open loop transfer function before and after the compensation network in matlab. The results indicated that the phase margin was 51.5 degrees, the steady state error was zero, and the down frequency of amplitude frequency characteristics was 40dB/dec at high frequencies after“double pole and double zero” compensation network. The results had better stability and dynamic performance, and better suppress in high frequency interference. The result has a very good reference for further research of other switching power supply.

Key words: Buck converter compensation network inductor current continuous mode small signal model double pole and double zero