Читать книгу Origin of Power Converters - Tsai-Fu Wu - Страница 27

Charles Darwin's dilemma is that if species are evolved from their ancestor species and if we keep tracking back to the origin, who is the original one and how to create or generate it? The same questions bother us: if PWM converters are evolved, which one is the origin and what is the mechanism to create it? In literature, there are many converters with various transfer codes, such as D/(1 − 2D), (1 − D)/(1 − 2D), D/(2 − D), D/2(1 − D), D²/(1 − D), etc., in which all of the combinational codes include the duty ratio D and it is just the transfer code of the buck converter in continuous conduction mode (CCM). Thus, we can intuitively reveal that buck converter is the original converter. In this book, we propose three approaches to creating the original converter.