NDLI: Coupled inductor-based DC–DC converter with high voltage conversion ratio and smooth input current

Content Provider	IET Digital Library
Author	Samuel, Vijay Joseph Keerthi, Gna Mahalingam, Prabhakar
Abstract	In this study, a coupled inductor (CI)-based high step-up DC–DC converter is presented. The proposed topology is developed from a primitive quadratic boost converter (QBC) structure. A two-phase interleaved QBC structure is obtained by employing multi-winding CIs instead of discrete inductors as the energy storage magnetic element. The voltage gain is further extended by using (i) voltage lift capacitor, (ii) CIs and (iii) voltage multiplier cells. Consequently, the voltage stress on the main switches is reduced to 18.9% of the output voltage. Moreover, interleaving mechanism helps in achieving a smooth input current profile; the input current ripple is only 4.59% of the total input current magnitude. To validate the proposed concept, 18 V/380 V, 150 W prototype converter is constructed and experimented. Under experimentation, the converter delivers the required power to the load at 95% full-load efficiency. Further, under closed-loop condition, the output voltage from the converter is regulated to the required standard value of 380 V DC.
Starting Page	733
Ending Page	743
Page Count	11
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 4, Mar (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.0933
Journal	IET Power Electronics
Publisher Date	2019-11-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	150 W Prototype Converter Control of Electric Power System Coupled Inductor-based DC–DC Converter Coupled Inductor-based High Step-up DC–DC Converter DC-DC Power Converter Discrete Inductors Employing Multiwinding CIs Instead Energy Storage Magnetic Element High Voltage Conversion Ratio Inductor Inductors And Transformer Input Current Ripple Output Voltage Power 150.0 W Power Converter Power Electronics Power Supplies to Apparatus Power Supply Primitive Quadratic Boost Converter Structure Smooth Input Current Profile Supervisory Circuit Total Input Current Magnitude Two-phase Interleaved QBC Structure Voltage 18.0 V Voltage 380.0 V Voltage Gain Voltage Lift Capacitor Voltage Multipliers Voltage Stress
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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