Paper Info
Title
Three-Phase Bidirectional Ultra-Wide Output Voltage Range Current Dc-Link Ac/Dc Buck-Boost Converter
Abstract
High power EV chargers connected to AC power distribution architectures employ a three-phase (3-Phi) PFC rectifier front-end and a series-connected isolated DC/DC converter to cover a wide range of traction battery voltages and efficiently supply the required charging current. In this paper, the operating principle of a two-stage 3-Phi buck-boost current DC-link PFC rectifier system is first introduced. Its optimal operating modes, minimizing conduction losses, switching losses, and CM noise emissions for every DC output voltage level, are identified. Adequate modulation strategies are proposed and explained through detailed switching patterns. Importantly, the two stages of the PFC rectifier system, i.e. the 3-Phi buck-type current source rectifier input stage and the subsequent three-level boost DC/DC stage, are controlled synergetically which ensures an automatic selection and seamless transition between the optimal combinations of operating modes of both stages. Simulation results verify the operation of the described power converter for different output voltage and output power levels. Furthermore, a new common-mode (CM) filtering method, requiring a CM DC-link inductor and a capacitive connection between an artificial 3-Phi neutral point and the DC output mid-point, is analyzed with the support of a derived CM equivalent circuit. Finally, a complete guideline for the design of the CM filter, based on analytical calculations of the CM voltage-time area, is presented.
Year
DOI
Venue
2020
10.1109/IECON43393.2020.9254753
IECON 2020: THE 46TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
Keywords
DocType
ISSN
Three-Phase Buck-Boost Current DC-Link PFC rectifier system, Three-Phase Buck-Type Current Source Rectifier, CM Equivalent Circuit, CM Filter Design
Conference
1553-572X
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Daifei Zhang100.34
Mattia Guacci200.34
Johann W. Kolar300.34
Johann W. Kolar4577151.35