Abstract
In this letter, an asymmetrical pulsewidth modulated (PWM) scheme is proposed to solve the inductor current unbalance and nonlinear voltage gain issues of the series-capacitor (SC) high-conversion-ratio (HCR) converter when $D > 0.5$. With the proposed scheme, the converter can achieve both current balancing and high step-down conversion even for $D > 0.5$. As a result, combined with the conventional PWM scheme, the duty cycle limitation of the SC-HCR converter is completely eliminated. A 2-kW prototype SC-HCR converter was fabricated and tested to validate the performance of the proposed PWM scheme.
| Original language | English |
|---|---|
| Article number | 9346028 |
| Pages (from-to) | 8628-8633 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 36 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2021 |
Keywords
- Asymmetrical pulsewidth modulated (PWM)
- buck converter
- high conversion ratio (HCR)
- interleaved
- series-capacitor (SC)