Abstract
In this article, a coupled-inductor (CI)-based bidirectional dc-dc converter with a high voltage conversion ratio (VCR) and low voltage stress is proposed. The topology can achieve high VCR by employing two CIs; moreover, the interleaved technique overcomes the defect of large current ripple in CI. A sensorless current balance between the two CIs is also realized without an auxiliary circuit and complex control method. The pulsewidth modulation plus phase-shift control is employed, where the duty cycle D is used to adjust the VCR, and the phase-shift angle φ is used to control the direction and amount of the transferred power. In addition, all switches can achieve soft-switching under a wide operation range. The steady-state analysis of the proposed converter is analyzed in detail, followed by comprehensive experimental verification under a 1-kW prototype.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 70 |
| Issue number | 3 |
| Pages (from-to) | 2450-2460 |
| Number of pages | 11 |
| ISSN | 0278-0046 |
| DOIs | |
| Publication status | Published - 1 Mar 2023 |
Bibliographical note
Publisher Copyright:© 1982-2012 IEEE.
Keywords
- Coupled-inductor (CI)
- high voltage conversion ratio (VCR)
- sensorless current balance
- wide soft-switching range