Energy Shaping Control for Wireless Power Transfer System in Automatic Guided Vehicles

Wenjie Chen,Liyan Zhang,Jia Liu,Si Chen

doi:10.3390/en13112959

Wenjie Chen, Liyan Zhang + Show 2 more

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https://doi.org/10.3390/en13112959

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Journal: Energies	Publication Date: Jun 9, 2020
Citations: 7	License type: CC BY 4.0

Affiliation: Wuhan University of Technology, Zhejiang University

Abstract

This paper proposes an energy shaping controller of a DC/DC converter for automatic guided vehicles (AGVs) wireless power transfer (WPT). A transformer is inserted after the LCC topology to improve the transfer power, and the DC/DC boost converter is added before this topology to obtain desired systematic power dynamically. The system power transfer model is derived based on the idea of voltage transformation and the desired power can be implemented indirectly through regulating desired output voltage of DC/DC converter. With the proposed controller, this WPT system will have a much better dynamic performance and the effective working time can be increased significantly. Furthermore, this paper proposes dynamical regulation strategy for output power to get real time target power according to the charging curve of the battery. Simulation and experimental results verified the control performance of the proposed control scheme. A WPT prototype with power up to 1.65 kW was built, and 92.12% efficiency from DC power source to battery load is achieved, which is 4% higher than that obtained by the conventional PID method.

Highlights

With the advantages of strong adaptability, high flexibility and automatic cruise, automatic guided vehicles (AGVs), referred to as mobile robots with guidance lane, have been widely applied in automated and intelligent logistics industry [1]
This paper aims to verify the energy shaping controller for the primary sided DC/DC converter of the wireless power transfer (WPT) system in AGVs
In order to validate the dynamic performance of the proposed interconnection and damping assignment passivity-based control (IDA-PBC), tests have been done in PLECS

Summary

Introduction

With the advantages of strong adaptability, high flexibility and automatic cruise, automatic guided vehicles (AGVs), referred to as mobile robots with guidance lane, have been widely applied in automated and intelligent logistics industry [1]. AGVs have played an important role in logistics and transportation, automatic processing, mechanical assembly and other related fields. The battery needs to be recharged and energized cycle by cycle, resulting in low utilization rate and high use cost [2]. Traditional charging systems require plug-in operation and there are some potential security issues. In order to realize automatic charging and solve the safety problems, it has great economic value to adopt new charging method to increase the effective working time of AGVs [3,4].

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