Abstract
In this article, a nonisolated bidirectional dc-dc converter is proposed based on coupled inductor (CL) and switched capacitor (SC). The converter can achieve a high voltage conversion ratio (VCR) by using CL and SC. The CL is operated not only as a filter inductor to regulate voltage but also as a transformer to improve the VCR. Furthermore, the voltage stresses of capacitors and switches are reduced by introducing SC structure. The pulsewidth modulation plus phase-shift control is employed, where the duty cycle is used to ensure that the voltages of two sides are matched and the phase-shift angle is used to control the direction and amount of power flow. In addition, all the switches can achieve zero voltage switching in both forward and backward modes under a wide operating range, which can improve the efficiency of power conversion. The operating principle and steady-state analysis are examined, and a 400-W prototype is designed to verify the validity of the proposed converter.
| Original language | English |
|---|---|
| Article number | 8967216 |
| Pages (from-to) | 1155-1165 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 68 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 2021 |
Keywords
- Bidirectional dc-dc converter (BDC)
- coupled inductor (CL)
- high voltage conversion ratio (VCR)
- nonisolated
- switched capacitor (SC)
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering