DC tsis kam kuaj ntawm transformer winding yog ib qho tseem ceeb xeem yam khoom tom qab lub transformer raug xa mus, overhauled thiab kais changer yog hloov. Nyob rau hauv ib txwm muaj xwm txheej, ntsuas DC tsis kam ntawm transformer windings thiab high-power inductive cov cuab yeej los ntawm cov txheej txheem ib txwm siv yog lub sijhawm siv sijhawm thiab ua haujlwm hnyav.
