Small-signal analysis of PWM boost converter in CCM with complex impedance load
Small-signal analysis of PWM boost converter in CCM with complex impedance load
复制标题
DOI：
10.1109/iecon.2015.7392659
复制
发表时间：
2015-11
期刊：
影响因子：
--
通讯作者：
Dalvir K. Saini;A. Ayachit;M. Kazimierczuk;T. Suetsugu
中科院分区：
文献类型：
--
作者：
Dalvir K. Saini;A. Ayachit;M. Kazimierczuk;T. Suetsugu
本文对工作在连续导通模式（CCM）下的脉冲宽度调制（PWM）升压型DC-DC变换器在复阻抗负载下的小信号特性进行了分析。利用现有的知识，通过电路平均法获得的升压转换器的小信号模型，本文提出了一种扩展的小信号传递函数的分析，电阻和电感负载阻抗的影响下。推导了工作在CCM模式下的升压变换器的控制-输出、输入-输出电压传递函数和输出阻抗的表达式。分析了这些传递函数的特性，讨论了附加电感对极点和零点位置的影响。结果表明，固有右半平面（RHP）的零点移动到左半的S-平面，当负载电感增加超过一个特定的值。通过对具有合适设计指标的升压变换器的仿真，验证了理论分析的正确性。
This paper presents a small-signal analysis of the pulse-width modulated (PWM) boost dc-dc converters operating in continuous-conduction mode (CCM) and subject to complex impedance load. Using the existing knowledge on the small-signal model of the boost converter obtained through the circuit averaging approach, this paper presents an extended analysis of the small-signal transfer functions, under the influence of resistive and inductive load impedances. The expressions for the control-to-output, input-to-output voltage transfer functions, and the output impedance of the boost converter operating in CCM are derived. The characteristics of these transfer functions are analyzed and the effect of the added inductance on the location of poles and zeros is discussed. It is shown that the inherent right-half plane (RHP) zero shifts to the left-half of the s-plane, when the load inductance is increased beyond a specific value. The theoretical results are validated by simulations of a boost converter with suitable design specifications.