Novel three-phase current-regulated digital PWM and its behavioral analysis
| Autor: | Eisuke Masada, Masaaki Ohshima |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Engineering
Computer science business.industry Electrical engineering Energy Engineering and Power Technology Complex programmable logic device Industrial and Manufacturing Engineering Power (physics) Controllability Three-phase Control theory Electronic engineering Inverter Digital control Electrical and Electronic Engineering business Field-programmable gate array Pulse-width modulation Digital signal processing |
| Zdroj: | Electrical Engineering in Japan. 150:62-77 |
| ISSN: | 1520-6416 0424-7760 |
| DOI: | 10.1002/eej.10330 |
| Popis: | There have been various studies of PWM algorithms for a three-phase voltage-source AC/DC power converter since the analog modulation scheme based on a triangular carrier wave was proposed in the 1960s. The PWM algorithm can be considered the heart of electronic power conversion. With progress in digital technology, there is an increasing need for gate signals to be generated directly by digital ICs, such as MPU, DSP, or FPGA/CPLD. This paper analyzes quantitatively the precision of current control of digital PWM taking account of both the sampling period and the delay time (the latter is inevitably accompanied by a digital procedure). The delay time is shown to have a double effect on the current error. In addition, the paper theoretically derives the conditions for digital PWM to meet the PPCR (Pulse Polarity Consistency Rule, that is, the next gate command moves only to the adjacent ones or commands). So far as the authors know, no paper has presented the mathematical requirements for PPCR taking account of the effect of the delay time of digital PWM. The derived theoretical results are summarized as digital PWM design criteria for a three-phase PWM converter in order to facilitate practical implementation of the theory, guaranteeing PPCR behavior as well as quantitative accuracy of current regulation. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 150(2): 62–77, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10330 |
| Databáze: | OpenAIRE |
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