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高频继电器
2022-07-27 19:25:00 【CupidoZ】

高频继电器用以切换高频电路的继电器,切换频率在100MHz以下的高频信号继电器称为高频继电器。由陶瓷为基座组成的低剖面组件,完全匹配干簧开关和引脚间的热膨胀系数,并可减少降低任何于封装内部产生的热应力,切换寿命可达数十亿次。
高频继电器作业原理:一般由铁芯、线圈、衔铁、触点簧片等组成的。只需在线圈两头加上必定的电压,线圈中就会流过必定的电流,然后发生电磁效应,衔铁就会在电磁力招引的效果下战胜回来绷簧的拉力吸向铁芯,然后带动衔铁的动触点与静触点(常开触点)吸合。当线圈断电后,电磁的吸力也随之消失,衔铁就会在绷簧的反效果力回来本来的方位,使动触点与本来的静触点(常闭触点)吸合。这样吸合、开释,然后达到了在电路中的导通、堵截的意图。
利用了电磁效应来控制机械触点达到通断目的,给带有铁芯线圈通电-线圈电流产生磁场-磁场吸附衔铁动作通断触点,整个过程是“小电流-磁-机械-大电流”。
继电器的作用本质是用一个回路(一般是小电流)去控制另外一个回路(一般是大电流)的通断,而且这个控制过程中,两个回路一般是隔离的。
利用了电磁效应来控制机械触点达到通断目的,给带有铁芯线圈通电-线圈电流产生磁场-磁场吸附衔铁动作通断触点,整个过程是“小电流-磁-机械-大电流”。
继电器的作用本质是用一个回路(一般是小电流)去控制另外一个回路(一般是大电流)的通断,而且这个控制过程中,两个回路一般是隔离的。
高频继电器是较为特殊的一类继电器,多使用在对于开关动作要求较高的环境中。要么是开关速度高,要么是频率高。
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