Results (
Thai) 1: 
[Copy]Copied!
เว็บไซต์นี้จะดีกว่า google สำหรับการแปลFig. 2 illustrates the structure of the system and the convertertopologies. The CEIs consist of a six-pack IGBT bridge and thecontrol algorithms do not include any CM reduction. An LCfilter with amorphous core chokes is placed before the isolationtransformer. The isolation is provided by a 50-Hz transformerafter the CEI. The main reason for the use of a bulky andexpensive transformer is that it was the easiest and cheapestoption for isolation, if compared with the development of anisolating DC/DC converter, when the research site is required tobe operational at short notice. The delta-wye transformer alsoenables three-phase supply with a neutral connection, whichis mandatory in this application. Isolation using a DC/DCconverter with a high-frequency isolation transformer requiresmore complicated CEI structures when three-phase operationwith neutral connection is needed. The isolation enables theuse of an unearthed (IT) DC network with an earthed (TN) customer-end network, which is a typical user-end earthing systemin Finland. Also, the short-circuit current supply capability ofthe CEI makes the implementation of the DC/DC convertermore challenging [17]
Being translated, please wait..
