1977年国外首先研制成功脉宽调 制(PWM)控制器集成电路,美国摩托罗拉(Motorola)公司、硅通用(Silicon General)公司、尤尼特德(Unitrode)公司等相继推出一批PWM芯片,典型 产品有MC3520、SG3624、UC3842。
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LAG847 crude oil demulsifier is compounded with silicon demulsifier and general demulsifier. Its application into the hermetic process in the No.
原油破乳剂lag847由含硅破乳剂与普通破乳剂复配制得。
It is difficult to apply general PID control to the equipment of monocrystalline silicon growth with the nonlinear and great pure hysteresis characteristics.
单晶硅晶体生长炉具有非线性和大纯滞后的特点,应用常规pid控制难以实现有效控制。
Series Y3 asynchronous motors is a new series of general purpose low voltage three-phase cage motors designed with cold-rolled silicon steel sheet.
Y 3系列异步电动机是采用冷轧硅钢片作为导磁材料而设计的一般用途低压三相笼型异步电动机基本系列。
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