Digital V2 Control of DC-DC Switching Converters Based on Leading-Edge Modulation
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摘要: 为促进数字控制技术的发展,基于数字控制器的基本功能模块和V2控制方法的基本原理,提出了基于前缘调制的数字V2控制算法,并探讨了该算法消除次谐波振荡的原理.基于MATLAB仿真软件平台,对采用数字V2控制算法的开关变换器进行了计算机仿真,并采用FPGA(现场可编程门阵列)作为硬件平台进行了实验.在相同的Buck变换器上,将采用数字V2控制算法与电压型控制算法的仿真结果和实验结果进行了比较,结果表明,采用数字V2控制算法可提高开关变换器的动态性能.Abstract: In order to accelerate the development of digital control technique,a digital V2 control algorithm based on leading-edge modulation was proposed by introducting the blocks of digital controller and the theory of V2 control,and the principle of eliminating the sub-harmonic oscillation was investigated deeply.Numerical simulation of the switching converter with digital V2 control algorithm was performed based on MATLAB software platform,and experiments were carried out on FPGA(field-programmable-gate-array) hardware platform.The simulation and experiments results obtained respectively using the digital V2 control algorithm and a digital voltage control algorithm with the same Buck converter were compared.The results show that better performances of a switching converter can be obtained with the digital V2 control algorithm based on leading-edge modulation than with the voltage control algorithm.
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Key words:
- digital control /
- V2 /
- DC-DC switching converter
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