- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
The development of power electronics in the past century and the current state of the art of power electronics converters are briefly reviewed, before giving an insight into the deficiencies of the conventional current-source and voltage-source converters and into the superiority of impedance-source converters and, then, proposing a design methodology for impedance-source converters aimed to replace the traditional tedious, manual and experience-dependent design methods. Some examples for their deployment in renewable-energy applications are discussed, and the direction into which power electronic converters will develop in the future is indicated.
This paper has briefly expounded the development history of power electronics (converters) and reviewed various converters used in the past and currently. Then, a qualitative analysis has been conducted to explain the problems of conventional converters, like shoot-through, open-circuit, and limited output-voltage/current gain, which greatly hinder wide applications of power electronics in industry. This analysis reveals, in turn, that the newly proposed impedance-source converters can overcome these problems, demonstrating great potential for industrial applications, especially in renewable energy systems.
A further analysis derives a set of criteria for designing impedancesource converters, which leads to a design methodology dealing with input- and output-impedance matching, and with load-phase matching. This overcomes the shortcomings of the traditional tedious, manual and experience-dependent design methods and eases the design of new converters. With this design methodology, a Z-source half-bridge converter for electroplating applications and a dual-output Z-source half-bridge converter for hybrid electric vehicles have been designed. It is expected that a variety of impedance-source converters will to be designed in the near future addressing the needs of specific industrial applications.