行回扫变压器最大输出功率测试原理及方法  

Theory and Method of Measuring Max Output Power of Fly-back-transformer

作　　者：王祥斌 严志豪 

机构地区：[1]康佳电子有限公司,江苏常熟215539

出　　处：《现代电子技术》2007年第12期35-37,40,共4页Modern Electronics Technique

摘　　要：当彩色电视机行回扫变压器在额定工作状态下工作时,在其初级线圈两端输入恒定直流电流,并且使电流方向与行回扫变压器供电电源提供的电流方向保持一致。逐惭增加恒定直流电流到达某一数值时,用示波器可以观察到行回扫变压器初级线圈电流在正向峰值附近出现非线性上升。以行回扫变压器正向峰值电流出现非线性上升临界点为标准,可得出行回扫变压器最大输出功率Pmax与电源电压Vo、电源电流Io、直流叠加电流I及行回扫变压器工作效率η的关系式为Pmax=ηVoIo+TsTηVoI。When color TV fly- back- transformer works on the rating output power, adding constant DC current between the ends of its primary coil and making its direction as same as the power supply. Slowly increasing the value of constant DC current,until the positive peak current flowing in primary coil of fly- back- transformer shows no- line rise by oscillograph.At this point, the relationship between the maximum output power of fly - back - transformer and power supply Vo, power supply Io ,etc,can be expressed by formula Pmax=ηVoIo＋Ts/TηVoI.

关 键 词：最大输出功率 直流叠加 功率余量 行回扫变压器 

分 类 号：TP206.1[自动化与计算机技术—检测技术与自动化装置]