Conventional dual-buck ac-ac converter can generate a high output voltage using standard low voltage rating semiconductor devices. It has no commutation problem; however, it needs more inductors. In this paper, an improved cascaded dual-buck ac-ac converter requiring fewer inductors is presented to improve the power density and decrease the converter cost. The proposed converter is able to catch a higher output voltage with standard low voltage rating devices. The commutation problem does not occur in the proposed converter. Additionally, the proposed converter uses MOSFETs to improve efficiency, and disables their body diodes to eliminate the loss of reverse recovery and associated issues. In order to reduce the volume of inductors and capacitors, the cascaded units are phase-shifted. To validate the feasibility of the proposed converter, experimental results of the proposed 1 kW cascaded dual-buck converter with 310 V input voltage, and 350Vrms output voltage are provided.
|Title of host publication||2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||6|
|Publication status||Published - 2020 Nov 29|
|Event||9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia - Nanjing, China|
Duration: 2020 Nov 29 → 2020 Dec 2
|Name||2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia|
|Conference||9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia|
|Period||20/11/29 → 20/12/2|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT (MIST), Korea government (No. 2020R1A3B2079407).
© 2020 IEEE.
All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
- Control and Optimization