摘要
采用完全可编程的数字电源控制器UCD3138作为数字电源的主控芯片。通过片内数字电源控制环路执行数字控制。此环路由1个专用误差模数转换器(EADC)、1个基于2极点2零点数字PIDα环路补偿器CLA和具有250 ps脉宽分辨率的数字脉宽调制器(DPWM)组成。EADC将输出电压的采样值转换为数字量,利用CLA的PIDα控制律实现基准值与采样值之间的误差调节,通过片内DPWM发出PWM波,驱动数字电源主电路开关管工作,从而控制数字电源达到稳定输出。详细分析了数字环路控制基本原理和PIDα CLA设计方法,并基于Fusion Digital Power Designer软件对所设计的PIDα CLA进行仿真验证,最后使用C语言设计了相应的PIDα CLA,并在实验样机上基于PSM3750频率响应分析仪验证PIDα算法,实验验证了该数字电源PIDα CLA设计方法的正确性与可行性。
The fully programmable digital power controller UCD3138 is used as the master chip for digital power supply.Digital control is performed by the UCD3138 digital power control loop which is routed by a dedicated error analog to digital converter(EADC),a 2 poles 2 zeros digital PIDa compensator CLA and a digital pulse width module(DPWM)with 250 ps pulse width resolution.The EADC converts the sampled value of the output voltage into a digital quantity.The PIDa control law of the compensator realizes the error adjustment between the reference value and the sampled value.The on-chip DPWM sends a PWM wave to drive the main circuit switches work to control the digital power supply to achieve a stable output.The basic principles of digital loop control and the design method of digital PIDa compensator are analyzed in detail and the PIDαcompensator of the design is simulated and verified based on Fusion Digital Power Designer software.Finally,the corresponding PIDa compensator code is designed in C language.Code debugging is performed on the actual prototype based on PSM3750 frequency response analyzer.The correctness and feasibility of the design method for the digital power PIDαcompensator are verified.
作者
邹扬
赵隆冬
梁寰宇
张石磊
ZOU Yang;ZHAO Long-dong;LIANG Huan-yu;ZHANG Shi-lei(The 43rd Research Institute of CETC,Hefei 230088,China)
出处
《电力电子技术》
CSCD
北大核心
2021年第6期37-40,共4页
Power Electronics
关键词
补偿器
数字电源
零极点配置
compensator
digital power
pole-zero configuration
