Rectification techniques for wireless power receiver

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dc.contributor.advisor Hu, P en Zou, Lixiang en 2012-05-01T03:54:09Z en 2012 en
dc.identifier.uri en
dc.description Full text is available to authenticated members of The University of Auckland only. en
dc.description.abstract Wireless power transfer technologies have been developed to deliver power without direct electrical contacts, IPT (Inductive Power Transfer) is one of the most popular which has many competitive advantages over conventional conductive power transfer methods and other wireless power transfer technologies. It has become very attractive and been successfully applied in various industrial and commercial fields where direct electrical contact is impossible or inconvenient. To transfer power wirelessly, an IPT system normally comprises a power transmitter which generates a high frequency alternating current in a track/coil, and one or multiple power receivers magnetically coupled to it. The design and implementation of the secondary power receiver is very important, because it affects the overall system performance and cost. A secondary power receiver usually consists of a pickup tuning circuit, rectifier, and power flow regulator; therefore, any improvement and development on these aspects are desirable. In this thesis, after a comprehensive literature review on existing rectification technologies for wireless power receivers, a new rectifier with combined power flow control capability is introduced and developed to simplify the secondary power receiver. Since the traditional wireless power receiver usually employs two separate stages (rectifier and power flow regulator) after the tuning circuit to obtain a required DC output voltage, the receiver circuit is often large and complicated. In addition, a big DC inductor often needs to be used in the power flow regulator, which further increases the receiver circuit, especially for heavy current applications, because the dc inductor is often the largest component in such a circuit. Therefore, it is desirable to develop a new rectifier with combined power flow control capability, and also to eliminate the DC inductor used in traditional wireless power receivers The operation characteristics of the proposed rectifier with combined power flow control capability have been simulated and investigated using the PLECS toolbox in a MATLAB/Simulink environment. A prototype of this new rectifier with a control circuit for a series tuned power receiver without using a DC inductor has been successfully built and tested. The power receiver size is reduced by using a new control strategy instead of using a separate power control regulator. The theoretical analysis of the proposed rectifier has been verified by simulation and experimental study. It has demonstrated that the prototype series tuned power receiver can receive about 50 watts of power when it is coupled to a push-pull resonant transmitter. The efficiency of this complete IPT system can reach about 80%. en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights Restricted Item. Available to authenticated members of The University of Auckland. en
dc.rights.uri en
dc.rights.uri en
dc.title Rectification techniques for wireless power receiver en
dc.type Thesis en The University of Auckland en Masters en
dc.rights.holder Copyright: The author en en
pubs.elements-id 345206 en
pubs.record-created-at-source-date 2012-05-01 en

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