Fang Lin LUO,Hong YE
电工电能新技术. 2004, 23(3): 6-12.
Mathematical modelling for power DC DC converters is a historical problem accompanying DC DC conversion technology since 1940's.The traditional mathematical modelling is not available for complex structure converters since the differential equation order increases very high.We have to search otherway to establish mathematical modelling forpowerDC DC converters.We have theoretically defined a newconcept- Energy Factor(EF)in this paper and researched the relations between EF and the mathematical modelling for power DC DC converters. EF is a new concept in power DC DC conversion technology,which thoroughly differs from the traditional concepts such as power factor(PF), power transfer efficiency(η),total harmonic distortion(THD)and ripple factor(RF). EF and the subsequential EFV(and EFVD)can illustrate the system stability, reference response and interference recovery.This investigation is very helpful for system design and DC DC converters characteristics foreseeing.Two DC DC converters: Buck converter and Super-Lift Luo-Converter as the samples are analysed in this paper to demonstrate the applications of EF, EFV(and EFVD),PE,SE,VE(and VED),time constantτ and damping time constantτd.