2015年度全国大学生电子设计竞赛论文模板.docVIP

2013年全国大学生电子设计竞赛 双向DC-DC变换器（A题） 20年月日 摘 要 Abstract DC Current Stabilized Power Supply used in the modern electronic equipment is divided into two categories:linear power supply and switch power supply.Compared with the linear power supply ,switching power supply have advantages of efficiency, volume, weight and so on,especially high frequency switching power supply is becoming lighter, smaller, more efficient and reliable, which makes the high frequency switching power supply become the most widely used power supply.Switching constant-current source can adjust pulse width and the output voltage by means of a current sampling of reflecting the change of load to keep the output current constant.Usually the constant-current source sampling circuit collects the output current signal.But in fact the acquisition is the voltage signal which can respect the current size through the I / V conversion .A design of the constant current source using TL494 chip as PWM controller is introduced in this paper,of which the input voltage of DC 30V, output current of 1-2A, open circuit voltage voltage of 24V. It mainly introduces the designing idea of the power supply, the working principle and characteristics. Parameters of the main circuit and control circuit were calculated and selected on this basis.According to the existing experiment condition, a power board is designed while the experimental waveforms are given. Keywords:TL494; half-bridge converter; constant current source 目 录 1系统方案 2 1.1 XXXX的论证与选择 2 1.2 XXXX的论证与选择 2 1.3 控制系统的论证与选择 2 2系统理论分析与计算 2 2.1 XXXX的分析 2 2.1.1 XXX 2 2.1.2 XXX 2 2.1.3 XXX 2 2.2 XXXX的计算 2 2.2.1 XXX 2 2.2.2 XXX 2 2.2.3 XXX 3 2.2.4vs岁v 3 2.3 XXXX的计算 3 2.3.1 XXX 3 2.3.2 XXX 3 2.3.3 XXX 3 3电路与程序设计 3 3.1电路的设计 3 3.1.1系统总体框图 3 3.1.2 XXXX子系统框图与电路原理图 3 3.1.3 XXXX子系统框图与电路原理图 3 3.1.4电源 3 3.2程序的设计 4 3.2.1程序功能描述与设计思路 4 3.2.2程序流程图 4 4测试方案与测试结果 4 4.1测试方案 4 4.2 测试条件与仪器 4 4.3 测试结果及分析 5 4.3.1测试结果(数据) 5 4.3.2测试分析与结论 5 附录1：电路原理图 6 附录2：源程序 7 双向DC-DC变换器（A题） 【组】 1系统方案