The paper introduces a multi-level H-bridge converter, which produces 18-step waveform according to required control method. The standard sine waveform can be gotten after passing through the filter.
介绍了一种多级H桥并联变换器，通过一定的控制方式使每个H桥变压器副边产生的波形叠加成18阶梯波，经滤波后可得到比较标准的正弦波。
The new cognition of the octothorpe shaped distributing pattern is gotten after synthesized deliberation of coal resource geologic, geographic and socioeconomic regional differentiating phenomena.
中国煤炭资源的“井”字型分布格局，是对煤炭资源地质的、地理的、社会经济的区域分异现象，进行综合考量后所得出之新认识。
The new cognition of the octothorpe shaped distributing pattern is gotten after synthesized deliberation of coal resource geologic, geographic and socioeconomic regional differentiating phenomena.
中国煤炭资源的“井”字型分布格局，是对煤炭资源地质的、地理的、社会经济的区域分异现象，进行综合考量后所得出之新认识。
应用推荐