多输出反激式开关电源的研究与设计  

Research and Design of multi-output flyback switching power

作　　者：曹子轩 郎宝华[1] 杨泽睿 Cao Zixuan;Lang Baohua;Yang Zerui(School of Electronic In formation Engineering.Xi’an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学电子信息工程学院,西安710021

出　　处：《电子测量技术》2020年第4期11-15,共5页Electronic Measurement Technology

摘　　要：针对应用于逆变器内部,为逆变器提供直流电的应用场合设计了一款多输出反激式开关电源。该电源有三路输出端,分别为+12、-12和+5 V输出端。为使输出电压更为稳定,系统响应速度更块、抗干扰能力更强,设计了反激式开关电源基于电流型控制方式的双闭环反馈回路和零点-极点补偿网络。该开关电源电路主要有以下各部分组成:主电路、控制电路还有采样电路。PWM控制电路采用UC3844芯片,采样电路由PC817与TL431组成。经仿真验证,所设计的反激式开关电源输出精度高,且输出效果稳定。This paper designs a multi-output flyback switching power supply for the application of direct current in inverter. This power has three output terminals are respectively +12,-12 and +5 V output terminal. In order to make the output voltage more stable, the response speed of the system more block and the anti-interference ability more strong, this paper designs the double closed-loop feedback based on current mode control and zero-pole compensating network. The switch power circuit mainly consists of the following parts: main circuit, control circuit, sampling circuit. PWM control circuit adopts UC3844 chip, the sampling circuit consists of PC817 and TL431. Simulation results show that the flyback switching power supply designed in this paper has high output precision and stable output effect.

关 键 词：反激式开关电源 多路输出 双闭环反馈 补偿网络 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]