Electronic control unit. Contains a switching transistor controlled by a speed sensor and is used to open and close the primary circuit.

电子控制单元。包括由转速传感器控制的开关晶体管，用来断开或接通初级电路。

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The characteristics, basic circuit, and working wave pattern of transistor type optical coupler and its function in electronic control unit of hydraulic discharging machine were introduced.

介绍了晶闸管光耦合器的特性、基本电路、工作波形及其在液压下料机电子控制装置中的作用。

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