Electrical conductance and temperature of electric copper busbar joints were measured under different torque moments. Experimental results show that laser surface melting can increase hardness and refine structure of ...Electrical conductance and temperature of electric copper busbar joints were measured under different torque moments. Experimental results show that laser surface melting can increase hardness and refine structure of the copper, and it does not deteriorate electric resistance. Meanwhile, the temperature of laser treated joints under electric current is slightly lower than that of original sample. Salt spray test shows that laser treated sample has better salt spray corrosion resistance than the original sample does. The electric resistance of both laser treated and original samples are increased with salt spray time. For the same salt spray time, the electric resistance of busbar joint is decreased with increasing torque moment.展开更多
随着光伏组串式逆变器功率的不断提升,对最大功率点跟踪(Maximum Power Point Tracking,MPPT)侧电流传感器的热设计提出了更高要求。为了解决铜排在MPPT侧电流传感器中的发热问题,文章基于传热学原理和铜排的电热耦合特性,建立了精确的...随着光伏组串式逆变器功率的不断提升,对最大功率点跟踪(Maximum Power Point Tracking,MPPT)侧电流传感器的热设计提出了更高要求。为了解决铜排在MPPT侧电流传感器中的发热问题,文章基于传热学原理和铜排的电热耦合特性,建立了精确的数学模型,并提出了一种铜排温升的理论计算方法。首先,利用ANSYS有限元分析软件,建立了铜排的热仿真模型,对铜排温升进行了数值模拟;然后,搭建了实验平台,对铜排实际温升进行了测量。通过对比理论计算结果、仿真结果和实验数据,发现三者具有良好的一致性,最大误差控制在3%以内。这表明本文提出的热模型和理论计算方法是准确、可靠的,可为大量程电流传感器的热设计提供重要参考。展开更多
文摘Electrical conductance and temperature of electric copper busbar joints were measured under different torque moments. Experimental results show that laser surface melting can increase hardness and refine structure of the copper, and it does not deteriorate electric resistance. Meanwhile, the temperature of laser treated joints under electric current is slightly lower than that of original sample. Salt spray test shows that laser treated sample has better salt spray corrosion resistance than the original sample does. The electric resistance of both laser treated and original samples are increased with salt spray time. For the same salt spray time, the electric resistance of busbar joint is decreased with increasing torque moment.
文摘随着光伏组串式逆变器功率的不断提升,对最大功率点跟踪(Maximum Power Point Tracking,MPPT)侧电流传感器的热设计提出了更高要求。为了解决铜排在MPPT侧电流传感器中的发热问题,文章基于传热学原理和铜排的电热耦合特性,建立了精确的数学模型,并提出了一种铜排温升的理论计算方法。首先,利用ANSYS有限元分析软件,建立了铜排的热仿真模型,对铜排温升进行了数值模拟;然后,搭建了实验平台,对铜排实际温升进行了测量。通过对比理论计算结果、仿真结果和实验数据,发现三者具有良好的一致性,最大误差控制在3%以内。这表明本文提出的热模型和理论计算方法是准确、可靠的,可为大量程电流传感器的热设计提供重要参考。
