Multi-Phase Hybrid Boost Converter with High Conduction Loss Reduction and Fast Dynamic Response for Automotive Applications
2022 20th IEEE Interregional NEWCAS Conference (NEWCAS)(2022)
摘要
In this paper, the concept of multi-phase hybrid buck and boost converters (MP-HBUC and MP-HBOC), is presented. By using single-phase hybrid buck and boost converters (HBUC and HBOC), the proposed MP-HBUC and MP-HBOC significantly reduce conduction loss as compared to the conventional buck and boost converter (CBUC and CBOC). Thus, the proposed MP-HBUC and MP-HBOC maintain high efficiency at heavy loads. Furthermore, the proposed MP-HBOC achieves a minimum-phase characteristic (without right half-plan zero); therefore, the bandwidth and load transient response of the proposed MP-HBOC can be respectively much wider and faster than a CBOC. Implemented in PSIM with extensive analysis, a two-phase 97.16hybrid boost converter showed a max/min efficiency % and 91.3 %, respectively, over a load current of up to 0.25-10 A at 12 V input, 18 V output voltage. The efficiency improvement is up to 4.95 % at the maximum load. This work can be considered as the very first reported combination of multi-phase and hybrid concepts to design high power-efficient buck/ boost converters for automotive applications.
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关键词
Boost converter,hybrid DC-DC converter,multiphase DC-DC converters,loss reduction,GaN,PSIM
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