下载后可任意编辑全国电子设计竞赛ACDC 变换电路 A 题设计报告12024 年 4 月 19 日 全国大学生电子设计竞赛单相 AC/DC 变换电路(A 题)下载后可任意编辑 9 月 7 日32024 年 4 月 19 日下载后可任意编辑摘 要 本系统以 Boost 升压斩波电路为核心,采纳 PFC 功率因数校正专用控制芯片 UCC28019 产生 PWM 波形,进行闭环反馈控制,从而实现稳压输出。实验结果表明:电源进线的沟通电压和负载电流在比较宽的范围内变化时,电源输出直流电压能够保持较高的稳定性,电源沟通输入功率因数达到 89%,效率达到 92%,具有良好的电压调整率和负载调整率,另外,本系统还具有输出2.5A 过流保护,输出功率因数的测量与显示功能。关键词:开关电源 UCC28019 Boost 电路 功率因数校正 【Abstract】This system in order to Boost the Boost chopper circuit as IV2024 年 4 月 19 日下载后可任意编辑the core, adopts PFC control chip dedicated power factor correction UCC28019 PWM waveforms, the closed-loop feedback control, so as to realize the voltage output. The experimental results show that the power supply into line voltage and load current changes in a comparatively wide scope, can maintain the stability of the high power output dc voltage, power supply ac input power factor reaches more than 89%, efficiency of 92%, has the good voltage regulation and load regulation, In addition, this system also has 2.5 A output over-current protection, the measurement and display of power factor of the output.V2024 年 4 月 19 日下载后可任意编辑目 录1 系统方案.................................................................................................11.1DC/DC 变换模块的论证和选择............................................11.2PFC 控制方案的论证和选择...................................................22 系统理论分析与计算...........................................................................22.1 电路设计的分析...........................................................................22...