Next Article in Journal
3-D Printable Polymer Pelletizer Chopper for Fused Granular Fabrication-Based Additive Manufacturing
Next Article in Special Issue
Flywheel vs. Supercapacitor as Wayside Energy Storage for Electric Rail Transit Systems
Previous Article in Journal
Numerical Study of Latent Heat Thermal Energy Storage Enhancement by Nano-PCM in Aluminum Foam
Previous Article in Special Issue
A New Three-Level Flying-Capacitor Boost Converter with an Integrated LC2D Output Network for Fuel-Cell Vehicles: Analysis and Design
Open AccessArticle

Pulse Width and Frequency Hybrid Modulated LLC Converter Adapted to Ultra Wide Voltage Range

1
School of Electronic, Information and Electrical Engineering (SEIEE), Shanghai Jiao Tong University, Shanghai 200240, China
2
Changzhou Power Supply Company, Changzhou 213000, China
*
Author to whom correspondence should be addressed.
Inventions 2018, 3(4), 77; https://doi.org/10.3390/inventions3040077
Received: 18 September 2018 / Revised: 6 November 2018 / Accepted: 7 November 2018 / Published: 11 November 2018
In wide voltage range applications such as electric vehicles (EVs) onboard charging, conventional frequency modulated LLC topology has its intrinsic limitations. Its frequency span is extremely wide and the soft switching feature might get lost. To address this issue, this paper proposes a novel LLC resonant converter. The pulse width and frequency hybrid modulation are adopted to narrow down its switching frequency span. The operating principles, circuit modeling, and the design methodology are presented. A 1 kW rated prototype has been built to realize an efficient power flow between the 400 V DC bus and 200–440 V battery pack. The designed prototype validates the effectiveness of the proposed topology and modulation method. 96.8% peak efficiency is measured for the constructed experimental prototype. View Full-Text
Keywords: LLC; resonant converter; PWM; EV chargers LLC; resonant converter; PWM; EV chargers
Show Figures

Figure 1

MDPI and ACS Style

Khalid, U.; Khan, M.M.; Khan, M.Z.; Usman Rasool, M.A.; Xu, J. Pulse Width and Frequency Hybrid Modulated LLC Converter Adapted to Ultra Wide Voltage Range. Inventions 2018, 3, 77.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop