CAJ | 학술논문

为减小由输入电源扰动引起的输出电压工频纹波,改善DC/DC变换器动态性能,根据平均变量建模思想,为电压型PWM控制的Buck型变换器建立连续导电工作模式（CCM）下统一的平均变量等效电路。分析等效电路并根据前馈控制的不变性原理提出Buck型变换器针对输入电压扰动的线性化小信号补偿前馈控制原理及实现方法,采用该方法的Buck型变换器可快速补偿输入电压扰动,加快变换器在输入电压扰动时的动态调节过程,显著减小输出电压中包括工频在内的低频纹波,改善变换器的动态性能。仿真研究结果验证了文中线性化小信号补偿前馈控制原理、方法及其分析的正确性。
위감소유수입전원우동인기적수출전압공빈문파,개선DC/DC변환기동태성능,근거평균변량건모사상,위전압형PWM공제적Buck형변환기건립련속도전공작모식（CCM）하통일적평균변량등효전로。분석등효전로병근거전궤공제적불변성원리제출Buck형변환기침대수입전압우동적선성화소신호보상전궤공제원리급실현방법,채용해방법적Buck형변환기가쾌속보상수입전압우동,가쾌변환기재수입전압우동시적동태조절과정,현저감소수출전압중포괄공빈재내적저빈문파,개선변환기적동태성능。방진연구결과험증료문중선성화소신호보상전궤공제원리、방법급기분석적정학성。
To improve the dynamic performance of DC/DC converter against input voltage disturbance, and reduce the low frequency ripple of output voltage, a uniform average equivalent circuit is established for buck series converters under voltage mode PWM control and in continuous conduction mode. According to the invariance principle of feedforward control and the equivalent circuit analysis, linearized small- signal compensation feedforward control method and its implementation are presented. The buck series converter using this control method can quickly compensate for the input voltage disturbance deviation, accelerate the speed of dynamic response against the input disturbance, significantly reduce the low frequency ripple of the output voltage, and improve the dynamic performance of buck series converters. Simulation results ver- ify the correctness of the linearized small-signal compensation feedforward control method and its analysis.