Limit-Cycle-Free Digitally Controlled DC–DC Converters Based on Dyadic Digital PWM
| Autor: | Paolo Stefano Crovetti, Francesco Gregoretti, Maksudjon Usmonov, Francesco Musolino |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Limit Cycle Oscillations
Computer science 020208 electrical & electronic engineering Ripple Limit Cycle Oscillations Dyadic Digital Pulse Width Modulation (DDPWM) Dyadic Digital Pulse Modulation (DDPM) Dithering High Resolution PWM Digital Control of Power Converters 02 engineering and technology Converters Digital Control of Power Converters Liquid crystal on silicon Limit cycle 0202 electrical engineering electronic engineering information engineering Harmonic Electronic engineering Dithering Dither Dyadic Digital Pulse Width Modulation (DDPWM) High Resolution PWM Electrical and Electronic Engineering Pulse-width modulation Dyadic Digital Pulse Modulation (DDPM) Voltage |
| Zdroj: | IEEE Transactions on Power Electronics. 35:11155-11166 |
| ISSN: | 1941-0107 0885-8993 |
| DOI: | 10.1109/tpel.2020.2978696 |
| Popis: | Quantization-induced limit cycle oscillations (LCOs) in digitally controlled dc–dc converters are addressed in this article. The novel dyadic digital pulsewidth modulator is proposed to increase the effective pulsewidth modulator resolution, as required for LCO-free operation, at low cost, without sacrificing dc accuracy and with no detrimental effects on the ripple voltage. Experimental results on a synchronous buck validate the approach highlighting effective LCOs’ suppression and dc accuracy enhancement at 5× reduced peak output voltage ripple and up to 16-dB lower frequency harmonic component reduction compared to thermometric dithering for the same resolution increase. |
| Databáze: | OpenAIRE |
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