一(yi) 電(dian)(dian)容(rong)器的電(dian)(dian)壓(ya)(ya)特性,電(dian)(dian)壓(ya)(ya)不(bu)能(neng)是暫態(tai)的。當電(dian)(dian)源(yuan)側(ce)開關的電(dian)(dian)壓(ya)(ya)不(bu)是零時(shi),電(dian)(dian)容(rong)器和(he)電(dian)(dian)源(yuan)側(ce)就(jiu)會有電(dian)(dian)壓(ya)(ya)差,因為這部分設備(bei)的阻(zu)抗(kang)很小,引(yin)線(xian)上會產(chan)生高(gao)頻電(dian)(dian)流(liu),可能(neng)會對設備(bei)造成損壞。解決方法是電(dian)(dian)源(yuan)側(ce)電(dian)(dian)壓(ya)(ya)為零,電(dian)(dian)壓(ya)(ya)差為零,不(bu)產(chan)生勵磁(ci)涌流(liu)。
二是增加電容器到電源側的阻抗,以減小勵磁涌流的大小,如串聯電抗器。當電抗器的(de)尺寸適當時,可以(yi)防止(zhi)電容器和(he)系統阻抗之間的(de)共振。
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