Abstract
Conventional cascaded dual-buck dc-ac inverters and dual-boost ac-dc converters can achieve high efficiency by using power MOSFETs without causing reverse recovery issues. In addition, these topologies can provide high reliability by eliminating shoot-through issues. As a result, dead-time in the switching signals can be eliminated and higher switching frequencies can be used. However, these topologies have a major and serious drawback of having more inductors in them and a high magnetic volume. This paper presents a family of improved dual-buck dc-ac inverters and dual-boost ac-dc converters with fewer inductors that can effectively mitigate the high magnetic volume and large number of inductors problems without adding any complexity to the control or hardware. The proposed dual-buck inverters (DBI) and dual-boost converters have all the aforementioned benefits of conventional DBIs and dual-boost converters, respectively. In addition, they reduce the magnetic volume, cost, and complexity of the circuit layout through the use of fewer inductors. To validate the feasibility of the proposed topologies, experimental results of the proposed 2-kW cascaded dual-buck dc-ac inverter with 310 Vdc input voltage and 420Vrms output voltage are provided.
| Original language | English |
|---|---|
| Article number | 8744365 |
| Pages (from-to) | 2930-2942 |
| Number of pages | 13 |
| Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
| Volume | 8 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 2020 |
Keywords
- Dual-boost ac-dc converter
- dual-buck dc-ac inverter
- magnetic volume
- metal-oxide semiconductor field-effect transistor (MOSFET)
- power density
- reliability