China's mines are hoist AC Induction Motor Drive, and its electrical control system uses a rotor series, cutting speed resistance , by the relay - contactor control devices constitute a logical.
我国矿井提升绞车大多是采用交流异步电机拖动，其电气控制系统采用转子串、切电阻调速，由继电器-接触器构成逻辑控制装置。
This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits.
本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。
This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits. It is a practicable and energy-saving technology.
本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。这是一种实用的节能技术。
This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits. It is a practicable and energy-saving technology.
本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。这是一种实用的节能技术。
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