Modelling and control of a multi-stage interleaved DC-DC converter with coupled inductors for super-capacitor energy storage system

De, Dipankar and Klumpner, Christian and Patel, Chintanbhai and Kulsangcharoen, Ponggorn and Rashed, Mohamed and Asher, Greg (2013) Modelling and control of a multi-stage interleaved DC-DC converter with coupled inductors for super-capacitor energy storage system. IET Power Electronics, 6 (7). pp. 1360-1375. ISSN 1755-4543

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Abstract

Interleaved converters with coupled inductors are widely used to share load current in high power applications. It offers high equivalent switching frequency and reduced output current ripples using small size magnetic components. Due to smaller common-mode inductance, control system can be designed to achieve fast dynamic response. This paper proposes 8 channel interleaved DC/DC converter for interfacing super-capacitor energy storage system to a 400V DC voltage bus. Multi-stage interleaving magnetic circuit with two-phase coupling inductor as a building block is proposed. A methodology is developed to construct the model of the multi-stage magnetic circuit from the basic two-phase coupled inductor model. The derived model is successfully used to evaluate the system power losses and to design the magnetic circuit parameters and its current controller to fulfil the DC/DC converter steady state and dynamic performance specifications. A 20kW/four stage/8 channel DC/DC converter laboratory prototype has been built to connect a super-capacitor stack to 400V DC voltage bus. Experimental investigation validates the modeling, the system losses calculations and the design specifications of the system.

Item Type: Article
Additional Information: c2013 IET This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library
Keywords: Interleaved converter, Coupled inductor, Controller design, Modeling, Loss calculation
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: https://doi.org/10.1049/iet-pel.2012.0529
Depositing User: Klumpner, Dr Christian
Date Deposited: 06 Jul 2016 12:07
Last Modified: 16 Sep 2016 09:55
URI: http://eprints.nottingham.ac.uk/id/eprint/34659

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