正激变换器的峰值电流控制模式的建模  

Modeling of Peak Current Controlling Mode for Forward Converter

作　　者：杨华 

机构地区：[1]深圳市核达中远通电源技术有限公司,深圳518055

出　　处：《电源世界》2005年第8期27-33,40,共8页The World of Power Supply

摘　　要：众所周知,在电源领域峰值电流控制模式的补偿网络比电压控制模式的补偿网络好调整。然而,峰值电流控制模式建模要比电压控制模式建模复杂得多。在早期,有大量国外文献及众多电源专家介绍过电压控制模式的建模,但后来,峰值电流控制模式的建模相对提及较少,直到20世纪90年代以后才得以充分完善。RayRidley提出的更为精确的峰值电流控制模式的建模思想及结论广为应用,尤其是其结论。然而,一个简单的结论里面隐藏了太多的东西,在理论分析中令许多电源工程师没有足够的信心将此结论运用下去。受RayRidley峰值电流控制模式结论的启发,作者对其间的建模过程进行了反复的推敲与演算,本文正是基于RayRidley的建模思想而衍生的演算物,先以Buck电路为支点,分9个部分描述Bcuk电路的建模过程,并重点放在公式的演化和推导上,最后将其结论用于正激式峰值电流控制模式。It is well know that the parameters adjustment of compensate part in current programmed control mode power supply comes more easy than that in voltage control mode,however theoretically,peak-current programmed control mode is more and more complicate than voltage control mode,modeling the rwo modes is a good example.A great deal of original documents and power books have made a contribution to voltage control mode internationally,even more pave the way for the development of current programmed control,however,not until1990＇s,current programmed control did come to consummation,Ray Ridley＇s theory and modeling thought regarding this was greatly prevailing duringhis period,especiallythe result,whereas,more of the knowledgeseemed to be obscuredin such a simple result.Many engineers can not put it into application with enough assurance.Enlightened by Ray Ridley＇s result,the writer had made a full researchrelated to modeling way＇s full elaboration and detailed formular evolvement,hopefully,it was made up.On the basis of Ray Ridley＇s theory,This article,in some way,may be a derivation of Ray Ridley＇s modeling,which mainly focused on transfer funciton＇s derivation and evolvement after the modeling course was given,and finally,this result was put into current-mode forward converter＇s application.

关 键 词：小信号 建模 离散采样 传递函数 

分 类 号：TM92[电气工程—电力电子与电力传动]