This article has presented a multiphase bilateral dc/dc converter aimed to equip a C segment, next-generation car having a 42/14V dual-voltage electric power system. In the considered automotive application, transient response is not critical because batteries are available on both sides of the converter to buffer transients. The most important considerations were cost, efficiency, and size implications in topology and magnetic components optimization. The proposed solution has been compared with a conventional single-switch converter. Experimental results show that the proposed solution has greater efficiency over the entire input voltage range. The converter requires smaller output inductances if compared with a traditional topology, thanks to the current ripple cancellation effect obtained by suitably shifting the driving signals of the three phases. Compactness of the power conversion system is also increased compared to conventional solutions, while the reliability is improved. Further advantages can be achieved using coupled inductors. Different magnetic topologies have been introduced showing a different gapping configuration for two-phase converters, which leads to higher ripple reduction. The result was significant performance improvements; the ripple current in the inductors and the MOSFETs could be reduced without degrading the transient response time.
|Titolo:||Compact, Reliable Efficiency|
|Data di pubblicazione:||2004|
|Appare nelle tipologie:||1.1 Articolo in rivista|