小功率开关电源的Multisim仿真设计  

The Multisim Simulation Design of the Low Power Switching Power Supply

作　　者：李立平[1] 王振玉[1] 高艳玲[1] 王庆芬[1] 

机构地区：[1]石家庄铁道大学四方学院电气工程系,河北石家庄051132

出　　处：《通信电源技术》2013年第5期22-24,共3页Telecom Power Technology

摘　　要：开关电源具有小型、薄型、轻量化、高效化等诸多优点,逐渐与人们的工作、日常生活密切相连。利用计算机对开关电源进行设计和虚拟实验十分有效,能够克服成本高、工作量大等条件限制,是最为快速经济的设计方法。文中基于电流模式PWM控制芯片UC3842,设计了一款40 W的小功率开关电源,利用Multisim11.0软件的仿真工具箱进行了建模和仿真,可以随时改变仿真参数并用示波器观察仿真波形,使得仿真过程更加方便、快捷,提高了效率和精度,由仿真输出波形可见该电源具有较强的稳定性。The switching power mode supply with small, thin, lightweight, high efficiency and other advantages, make it gradually work with people, close link to daily life. Due to the limitation of the high cost, heavy workload and oth- er conditions, the making use of the computer switching mode power supply design and virtual experiment is very effective. The design method is rapid and economic. It designed a 40 W low power switching mode power supply based on the chip UC3842 of the current mode PWM control. It made a model and simulation which use toolbox of Multisim 11.0 software. It can change the simulation parameters at any time and observe the waveform with an oscilloscope, making the process more conveniently and quickly, the design showed that it can improve the efficiency and accuracy of the simulation. The output waveform of the power supply is visible with high stability.

关 键 词：开关电源 UC3842 Multisimll 0 仿真 

分 类 号：TN86[电子电信—信息与通信工程]