简述了利用太阳源测量天线增益的基本公式,讨论了各种修正因子的计算方法。当50 m天线工作于611 MHz时,测量的天线增益为47.754 dB i,天线效率为58.25%,且测量的天线增益同理论增益吻合很好。最后,对增益测量误差进行了分析,其均方根误...简述了利用太阳源测量天线增益的基本公式,讨论了各种修正因子的计算方法。当50 m天线工作于611 MHz时,测量的天线增益为47.754 dB i,天线效率为58.25%,且测量的天线增益同理论增益吻合很好。最后,对增益测量误差进行了分析,其均方根误差小于或等于±0.29 dB。展开更多
In order to avoid the bus voltage spikes caused by leakage inductance endangering the normal operation of the inverter,based on the improved Y-source inverter,the traditional clamping structure and voltage peak absorp...In order to avoid the bus voltage spikes caused by leakage inductance endangering the normal operation of the inverter,based on the improved Y-source inverter,the traditional clamping structure and voltage peak absorption circuit are introduced,and a high step-up and low-voltage stress improved Y-source inverter with the capability of absorbing bus voltage spike is proposed.This topology fully utilizes the structural characteristics of the improved Y-source inverter itself,and further increases the DC-side voltage gain on the basis of ensuring the busbar voltage peak absorption capacity,while reducing the capacitor voltage stress.This paper demonstrates the superiority of the proposed topology over improved Y-source inverter topology by analyzing its working principle and voltage gain,simulation and experiment platform are constructed to perform the circuit simulation and experiment,and the correctness of the theoretical analysis of the proposed inverter and the effectiveness of the busbar voltage peak absorption capacity are verified.展开更多
基金This paper is supported by Key R&D Program(Public Welfare)of Shandong Province(2019GGX103049)Graduate Education High-Quality Course Construction Project of Shandong Province(SDYKC17032).
文摘In order to avoid the bus voltage spikes caused by leakage inductance endangering the normal operation of the inverter,based on the improved Y-source inverter,the traditional clamping structure and voltage peak absorption circuit are introduced,and a high step-up and low-voltage stress improved Y-source inverter with the capability of absorbing bus voltage spike is proposed.This topology fully utilizes the structural characteristics of the improved Y-source inverter itself,and further increases the DC-side voltage gain on the basis of ensuring the busbar voltage peak absorption capacity,while reducing the capacitor voltage stress.This paper demonstrates the superiority of the proposed topology over improved Y-source inverter topology by analyzing its working principle and voltage gain,simulation and experiment platform are constructed to perform the circuit simulation and experiment,and the correctness of the theoretical analysis of the proposed inverter and the effectiveness of the busbar voltage peak absorption capacity are verified.
