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kai guan dian yuan te xing yan jiu ji qi xing neng gai shan
Author(s): 
Pages: 102-104
Year: Issue:  S3
Journal: China Nuclear Science and Technology Report

Keyword:  开关电源Y形接法阈值电压基频波;
Abstract: <正> 目前技术成熟、应用最为广泛的开关电源是半桥式脉冲调宽型(PWM)无工频变压器开关电源,它具有体积小、重量轻、对交流供电电压波动的适应性好、输出电流大、动态稳压性能好、交流-直流转换效率高等优点,我们专为LED电子显示屏研制的KGD-2型开关电源即属于此类电源,使用效果良好。但当应用于大型LED电子显示屏系统,若采用三相四线制动力和供电并采用Y形接法时,即使三相负载千衡仍发现地线中有较大电流,其值为相电流的2~3倍。这与现有的三相交流电理论不相符
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