半导体温差发电器匹配负载的热电耦合分析  

Thermal electric coupling analysis of matched load of semiconductor thermoelectric generator

作　　者：张韬[1] 周孑民[1] 黄学章[1] 梁高卫[1,2] 徐冰[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]邵阳学院,湖南邵阳422000

出　　处：《电源技术》2010年第10期1084-1086,1100,共4页Chinese Journal of Power Sources

摘　　要：根据实际温差发电器的结构及尺寸建立三维数学模型,模拟了温差发电器的热电耦合工作过程,分析了在发电器两端陶瓷片恒温工作状态下回路中负载电阻值对发电器工作性能的影响,结果表明改变负载会影响半导体内部温度分布并导致出现最大输出功率时的负载与发电器内阻不一致而出现漂移,结合模型从理论上解释了出现这种现象的原因并计算得出此时匹配负载的值。Three-dimensional mathematical model for thermoelectric generator based on the structure and size of the real model was established,the relationship between the working performance and the load resistance in loop was analyzed when the two ends of generator operated at the constant temperature.The result shows that the temperature distribution of the elements changes with the variation of the load resistance and the matched load drifts.the reason is explained theoretically and the value of matched load resistance is calculated.

关 键 词：温差发电 热电耦合 匹配负载 漂移 

分 类 号：TM913[电气工程—电力电子与电力传动]