A novel topologic structure of high frequency AC pulse density modulation converter is proposed, and its operation principle, control scheme and design are described in detail.
提出了一种新颖的高频交流脉冲密度调制变频器的拓扑结构，并详细阐述了工作原理、控制方案和设计方法。
Introduces the working principle and structure trait of CY3 hydraulic pressure operation machine, analyzes operating faults in detail, brings forward concerned treatment scheme.
介绍了CY 3型液压操作机构的工作原理及结构特点，对其实际运行中出现的故障进行了详细的分析探讨，并提出了有关处理方案。
According to the operation of the dockyard and the structure of ship lift harbor, open scheme of ship lift harbor was applied.
根据船厂的使用要求及升船机港池的结构特点，升船机港池采用放坡开放式的港池方案。
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