中(zhong)高壓(ya)固(gu)態(tai)軟(ruan)啟動器與低壓(ya)可控硅(gui)軟(ruan)啟動器基本原理(li)一樣(yang)，但是中(zhong)高壓(ya)固(gu)態(tai)軟(ruan)啟動器與低壓(ya)軟(ruan)啟動器相比,有些地方存在著(zhu)其特(te)殊性：

1.中(zhong)高(gao)壓(ya)固態軟啟(qi)動器(qi)(qi)在高(gao)壓(ya)環(huan)境下工作,各(ge)種電(dian)(dian)氣(qi)元(yuan)(yuan)器(qi)(qi)件的絕緣(yuan)性能一定要好,電(dian)(dian)子芯片的抗干擾能力要強。中(zhong)高(gao)壓(ya)固態軟啟(qi)動器(qi)(qi)組(zu)成電(dian)(dian)氣(qi)柜時,電(dian)(dian)氣(qi)元(yuan)(yuan)器(qi)(qi)件的布局以及與(yu)高(gao)壓(ya)軟啟(qi)動器(qi)(qi)與(yu)其(qi)它電(dian)(dian)氣(qi)設(she)備的連接(jie)也是非常重(zhong)要的。

2.中(zhong)高(gao)(gao)壓(ya)固(gu)(gu)態軟啟(qi)動(dong)(dong)器(qi)必須有(you)(you)一(yi)(yi)個(ge)(ge)高(gao)(gao)性能的(de)(de)(de)(de)控制點,能對信號(hao)進(jin)行及時(shi)和快速地處理。因此(ci)這個(ge)(ge)控制點一(yi)(yi)般(ban)采用高(gao)(gao)性能的(de)(de)(de)(de)DSP芯片,而不(bu)是低壓(ya)軟啟(qi)動(dong)(dong)器(qi)的(de)(de)(de)(de)普通單(dan)片機芯。低壓(ya)軟啟(qi)動(dong)(dong)器(qi)主回路由三(san)組反(fan)并聯(lian)的(de)(de)(de)(de)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)組成(cheng)。而在(zai)高(gao)(gao)壓(ya)軟啟(qi)動(dong)(dong)器(qi)中(zhong),由于(yu)目前單(dan)只高(gao)(gao)壓(ya)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)耐(nai)壓(ya)能力不(bu)夠,所以必須由多個(ge)(ge)高(gao)(gao)壓(ya)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)串聯(lian)進(jin)行分壓(ya)。但是每個(ge)(ge)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)性能參(can)(can)數(shu)(shu)沒有(you)(you)完(wan)(wan)全一(yi)(yi)致(zhi)。晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)參(can)(can)數(shu)(shu)的(de)(de)(de)(de)不(bu)一(yi)(yi)致(zhi)，會導(dao)致(zhi)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)開通時(shi)間不(bu)一(yi)(yi)致(zhi)，從而導(dao)致(zhi)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)損壞。因此(ci)在(zai)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)選配(pei)上,必須保(bao)證每一(yi)(yi)相的(de)(de)(de)(de)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)參(can)(can)數(shu)(shu)盡(jin)可(ke)能地一(yi)(yi)致(zhi)，并且每一(yi)(yi)相晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)RC濾波電路的(de)(de)(de)(de)元件(jian)參(can)(can)數(shu)(shu)盡(jin)可(ke)能一(yi)(yi)致(zhi)。高(gao)(gao)壓(ya)固(gu)(gu)態軟啟(qi)動(dong)(dong)柜的(de)(de)(de)(de)一(yi)(yi)個(ge)(ge)難點在(zai)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)觸發上。由于(yu)主回路有(you)(you)多個(ge)(ge)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan),每個(ge)(ge)晶(jing)(jing)(jing)(jing)(jing)閘(zha)(zha)管(guan)(guan)(guan)(guan)需(xu)要一(yi)(yi)塊觸發板來(lai)完(wan)(wan)成(cheng)觸發。

3.高壓(ya)(ya)固態(tai)軟(ruan)啟(qi)動(dong)器(qi)對(dui)信號(hao)(hao)的檢(jian)測(ce)比低壓(ya)(ya)軟(ruan)啟(qi)動(dong)器(qi)要求(qiu)更(geng)高。高壓(ya)(ya)軟(ruan)起動(dong)器(qi)所(suo)在的環境存在著大量的電(dian)磁(ci)干(gan)擾，并且高壓(ya)(ya)軟(ruan)啟(qi)動(dong)器(qi)所(suo)用的真(zhen)空接觸(chu)器(qi)和真(zhen)空斷(duan)路器(qi)在其分(fen)斷(duan)和閉合過(guo)程中會產生大量的電(dian)磁(ci)干(gan)擾。所(suo)以對(dui)檢(jian)測(ce)到的信號(hao)(hao)不僅要進(jin)行硬件(jian)濾波，也要進(jin)行軟(ruan)件(jian)濾波，去掉干(gan)擾信號(hao)(hao)。