Optimal Variable Frequency Soft Switching for Interleaved Grid Tied Inverters in Electric Vehicle Charging Applications

Youssef A. Fahmy (), Matthew Jahnes and Matthias Preindl
Additional contact information
Youssef A. Fahmy: Department of Electrical Engineering, Columbia University in the City of New York, New York, NY 10027, USA
Matthew Jahnes: Department of Electrical Engineering, Columbia University in the City of New York, New York, NY 10027, USA
Matthias Preindl: Department of Electrical Engineering, Columbia University in the City of New York, New York, NY 10027, USA

Energies, 2024, vol. 17, issue 23, 1-16

Abstract: Synchronized variable frequency soft-switching is analyzed and implemented in a 3-phase bidirectional grid-tied inverter. The common-mode connected topology and control allow for independent analysis of a single phase leg before six are combined into two interleaved, 3-phase inverters. Effective operation is enabled by discretizing the variable switching frequencies before synchronizing them with a control signal. The resulting inverter can operate at any power factor at power levels up to 50 kVA while maintaining zero-voltage switching (ZVS) throughout the grid cycle. Formal conditions for soft-switching and methods for achieving ZVS while maintaining global synchronization are presented. These conditions are then verified in a simulation. Finally, results for different power factors with and without interleaving are demonstrated in a prototype that achieves >98.1% efficiency when converting all real power.

Keywords: EV charging; grid-tied inverters; pulse width modulation converters; soft-switching; transportation electrification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/23/6077/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/23/6077/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:23:p:6077-:d:1535490

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().