摘要
使用传统型漆包线圈变压器的反激变换器由于原边漏感较大的影响导致RCD箝位电路耗散了大量能量,系统效率较低。本文用PCB铜箔印制线取代漆包线,并选用低高度、小体积的平面磁芯替代传统立式变压器,提高系统集成度的同时,既提高了变换器的功率密度,又提高了产品的加工一致性。使用Saber软件对采用UC3842结合TL431+PC817的系统方案进行仿真,优化了电路的设计参数。设计出平面变压器后打样并制作了一台样机进行测试,样品原边漏感仅占原边电感量的1.8%。同时与传统型漆包线圈变压器样机进行效率对比,实验证明在24 V^36 V的输入电压范围以及全负载范围内,平面变压器都相较传统型变压器有着更高的传输效率,效率最高可达86%。输出电压、输出功率以及输出电压纹波均满足设计要求。
Flyback converters using traditional enameled coil transformers have a large effect on the primary side leakage inductance,which causes a large amount of energy to be dissipated in the RCD clamp circuit and the system efficiency is low.In this paper,PCB copper foil printed wires are used to replace enameled wires,and low-height,small-volume planar magnetic cores are used to replace traditional vertical transformers.While improving system integration,it not only improves the power density of the converter,but also increases the product’s processing consistency.The system solution using UC3842 and TL431+PC817 is simulated using Saber software,and the design parameters of the circuit are optimized.After designing the plane transformer and proofing and making a prototype for testing,the primary leakage inductance of the sample only accounts for 1.8%of the primary inductance.At the same time,compared with the efficiency of the traditional enameled coil transformer prototype,the experiment proves that the plane transformer has higher transmission efficiency than the traditional transformer in the input voltage range of 24 V^36 V and the full load range,and the efficiency can reach 86%.The output voltage,output power,and output voltage ripple all meet the design requirements.
作者
林豪
石启元
洪峰
LIN Hao;SHI Qiyuan;HONG Feng(College of Electronic and Information Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 211111,China)
出处
《电子器件》
CAS
北大核心
2020年第5期1016-1020,共5页
Chinese Journal of Electron Devices
