基于FPGA的新型高分辨率DPWM控制电路

发布时间：2018-04-16 13:03

本文选题：FPGA + DPWM控制电路　；参考：《南京理工大学》2017年硕士论文

【摘要】：数字脉宽调制器(Digital Pulse Width Modulator,DPWM)具有抗干扰能力强,效率高及可重复编程等优点,因此被广泛应用于开关电源、通信、功率控制及变换等各个领域。本文基于现场可编程门阵列(Field Programmable Gate Array,FPGA)提出了新型高分辨率DPWM控制电路,解决了传统DPWM控制电路分辨率低及不稳定的问题,开展了 DPWM控制电路方面的研究。首先,给出两种基于不同FPGA资源的DPWM控制电路,即基于内嵌数字时钟管理器(Digital Clock Manager,DCM)模块以及基于IODELAY模块的控制电路;其次,对给出的两种硬件电路进行分析,找出限制其精度及造成其不稳定的因素,对两种电路同时其进行改进,并分别针对两种电路提出了改进的硬件电路;最后,利用FPGA的查找表(Look-Up-Table,LUT)模块,提出一种新型的基于数字延时电路的高分辨率DPWM控制电路。通过对DPWM控制电路的分析以及具体电路的硬件调试,在输入时钟频率为50MHz的情况下,提出的几种基于FPGA的DPWM控制电路的分辨率分别可以达到625ps、78ps和1ns。实验结果表明所提的DPWM控制电路解决了传统电路不稳定及分辨率低的问题,具有广泛的应用前景。
[Abstract]:Digital Pulse Width Modulation (DPWM) is widely used in many fields such as switching power supply, communication, power control and conversion because of its strong anti-jamming ability, high efficiency and repeatable programming.In this paper, a new high resolution DPWM control circuit based on Field Programmable Gate Array (Field Programmable Gate ArrayFPGA) is proposed, which solves the problems of low resolution and instability of traditional DPWM control circuit. The research on DPWM control circuit is carried out.Firstly, two kinds of DPWM control circuits based on different FPGA resources are given, which are based on embedded digital clock manager module and IODELAY module. Secondly, two kinds of hardware circuits are analyzed.Find out the factors that limit its precision and cause its instability, improve the two circuits at the same time, and put forward the improved hardware circuits for the two circuits respectively. Finally, the Look-Up-TableLUTS module of FPGA is used.A new high resolution DPWM control circuit based on digital delay circuit is proposed.Through the analysis of the DPWM control circuit and the hardware debugging of the specific circuit, when the input clock frequency is 50MHz, the resolution of the proposed DPWM control circuit based on FPGA can reach 625ps/ 78ps and 1nsrespectively.The experimental results show that the proposed DPWM control circuit solves the problems of instability and low resolution of traditional circuits and has a wide application prospect.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN791;TN761

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