Output Voltage Control of the SP topology IPT system based on Primary side Controller operating at ZVS

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Publication Details

Author list: Nutwong, Supapong;Sangswang, Anawach;Naetiladdanon, Sumate;Mujjalinvimut, Ekkachai

Publication year: 2017

Journal: ECTI Transactions on Computer and Information Technology (2286-9131)

Volume number: 11

Issue number: 1

Start page: 71

End page: 81

ISSN: 2286-9131

URL: https://www.tci-thaijo.org/index.php/ecticit/article/view/64857

Abstract

This paper presents a technique to control the output voltage of a series-parallel (SP) topology inductive power transfer (IPT) system using only a controller, located on the primary side. This reduces the cost, size, complexity and loss of the system compared to conventional IPT dual-side controllers. An asymmetrical duty cycle control (ADC) of full-bridge inverters was used to control the DC output voltage to its designed value. Additionally, a zero voltage switching (ZVS) operation can be obtained at all power levels by varying the switching frequencyof the inverter. Theoretical analysis was performed through a mutual inductance coupling model and verified by computer simulation. Experimental results of the circular magnetic structure IPT system with an adjustable air-gap confirm the validity of the proposed controller. The system efficiency was improved throughout the operation and the improvement became obvious as the output power was decreased.

Keywords

ADC Control, ZVS Operation