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固体继电器
2022-07-27 19:25:00 【CupidoZ】

固态继电器(SOLIDSTATERELAYS,以下简写成“SSR”),是一种全部由固态电子元件组成的新型无触点开关器件,它利用电子元件(如开关三极管、双向可控硅等半导体器件)的开关特性,可达到无触点无火花地接通和断开电路的目的,因此又被称为“无触点开关”。固态继电器是一种四端有源器件,其中两个端子为输入控制端,另外两端为输出受控端.它既有放大驱动作用,又有隔离作用,很适合驱动大功率开关式执行机构,较之电磁继电器可靠性更高,且无触点、寿命长、速度快,对外界的干扰也小,已被得到广泛应用 。


由于固体继电器是应用各类半导体或导体的等效电路封装而来的,所以在其工作过程中一般不会产生实体性质的物理合闸操作,此类继电器则有效避免了电火花和强电磁干扰的产生,此类继电器的合闸频率也较高,所以非常适用于一些对开关频率高和干扰低的工况当中,但是使用时也要充分考虑到其在维修和检查方面的不便,当然,质量可靠的继电器产品,一般只要按照额定参数去使用,也很少会出现工作不稳定或者不安全的情况。
由于其物理原理,它的电磁辐射量和范围都比实体物理合闸的继电器种类要小,它可适用的范围则更加广泛,一些对于干扰源要求不苛刻或者对频率要求较高的工况均可选用。
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