聚变堆主机关键系统综合研究设施(Comprehensive Research Facility for Fusion Technology,CRAFT)负离子源中性束注入(Negative Neutral Beam Injection,NNBI)电源首次采用逆变型整流方案,但离子源的时变、非线性及高可控等负荷特征给...聚变堆主机关键系统综合研究设施(Comprehensive Research Facility for Fusion Technology,CRAFT)负离子源中性束注入(Negative Neutral Beam Injection,NNBI)电源首次采用逆变型整流方案,但离子源的时变、非线性及高可控等负荷特征给电源电压和纹波控制带来了挑战。采用傅里叶变换分析逆变型直流高压电源拓扑,针对低频开关信号,提出一种新的逆变型直流高压电源传递函数分析方法以快速建立系统近似模型。通过PWM方式控制逆变器开关管占空比,相控整流控制直流母线电压,实现系统输出电压闭环控制以及提升纹波抑制能力,并设计1200 V/5 A实验测试平台验证控制方法的有效性。展开更多
To analyze the errors of processing data, the testing principle for jet elements is introduced and the property of testing system is theoretically and experimentally studied. On the basis of the above, the method of p...To analyze the errors of processing data, the testing principle for jet elements is introduced and the property of testing system is theoretically and experimentally studied. On the basis of the above, the method of processing data is presented and the error formulae, which are the functions of the testing system property, are derived. Finally, the methods of reducing the errors are provided. The measured results are in correspondence with the theoretical conclusion.展开更多
文摘To analyze the errors of processing data, the testing principle for jet elements is introduced and the property of testing system is theoretically and experimentally studied. On the basis of the above, the method of processing data is presented and the error formulae, which are the functions of the testing system property, are derived. Finally, the methods of reducing the errors are provided. The measured results are in correspondence with the theoretical conclusion.
