CAJ | 학술논문

　　针对串补用火花间隙的自放电特性研究，利用大电流MOSFET运放PA52设计与开发了适合火花间隙自放电试验电源的新型大功率放大器。本文理论分析了功率放大器工作效率、输出电压和系统电源的确定关系，采用了DC-DC隔离电源模块提升输出电压幅摆，设计了负反馈保护电路限制电流提高功率放大器的安全性。该功率放大器驱动20（纯阻性负载时，单端到地输出电压为-80V～+80V，电压增益20dB，电流可达4A，最大功率200W，最大效率75.3%。实验与分析表明，该功率放大器非线性失真小，带负载能力强，能满足用于研究火花间隙自放电特性的试验电源的要求。
　　침대천보용화화간극적자방전특성연구，이용대전류MOSFET운방PA52설계여개발료괄합화화간극자방전시험전원적신형대공솔방대기。본문이론분석료공솔방대기공작효솔、수출전압화계통전원적학정관계，채용료DC-DC격리전원모괴제승수출전압폭파，설계료부반궤보호전로한제전류제고공솔방대기적안전성。해공솔방대기구동20（순조성부재시，단단도지수출전압위-80V～+80V，전압증익20dB，전류가체4A，최대공솔200W，최대효솔75.3%。실험여분석표명，해공솔방대기비선성실진소，대부재능력강，능만족용우연구화화간극자방전특성적시험전원적요구。
In order to study the self-discharge characteristics of the spark gap of series compensation device, a high power amplifier which is suitable for power supply of spark gap self-discharge test is developed by utilizing a high current MOSFET power operational chip PA52. Therefore, this paper analyzed the definite relationship between the amplifier’s efficiency, output voltage and system power supply, adopted DC-DC isolated power supply modules to enhance the output voltage swing, and designed a negative feedback protection circuit to limit the current to improve the security of the power amplifier. This power amplifier can provide a maximum single-ended output voltage of 160V (peak to peak), a voltage gain of 20dB, a maximum current of 4A, a maximum power of 200W and a maximum efficiency of 75.3% with a 20(pure resistant load. The experimental results show that the power amplifier can meet the requirements of the test power supply for studying spark gap self-discharge characteristic due to its small nonlinear distortion, powerful load capacity and high efficiency.