Wireless Power Transfer

JMAG makes it possible to carry out investigations ranging from basic RLC analyses to efficiencypredictions. To determine the efficiency of a wireless power transfer design, you must analyze the power transfer as a function of position and angle. This can be done quickly in JMAG using the parametric analysis tool. This tool will not only predict optimal positioning, but it will also help develop a robust and reliable design.

Evaluation Items

Self-inductance, mutual inductance, induction voltage, load current, power, copper loss, iron loss, transmission efficiency, temperature distribution

Case Studies

Power Transmission Efficiency

In the electromagnetic induction-type wireless power supply, magnetic flux linking to the upper power-receiving side reduces due to positional misalignment. A decrease in flux linkage causes a reduction in the mutual inductance between coils. From this the resonant frequency determined by the inductance and the capacitor is shifted, and transmission efficiency decreases. Also, when the voltage of the power-receiving side coil is constant, the input voltage on the power supply side changes, and the supply power itself reduces.




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    • JMAG Users Conference Proceedings

    Electromagnetic Modelling in Teaching and Research Projects at the Unibersity of Auckland, New Zealand

    Dariusz Kacprzak, The University of Auckland

    6 Dec 2005

    • Application Catalog

    86 – Power Transmission Analysis of a Wireless Power Transfer System

    OverviewA wireless power transfer system is a device which uses electromagnetic induction to provide electric power without physical contact. They can be used for various applications, such as moving…

    30 Jan 2008

    • JMAG Users Conference Proceedings

    Efficiency improvement of non-contact power supply systems

    Hiroyasu Tomita, MURATA MACHINERY,LTD.

    12 Dec 2008

    • Application Catalog

    113 – Power Transmission Analysis of a Wireless Power Transfer System with Opposing Cores

    OverviewA wireless power transfer system is a device which uses electromagnetic induction to provide electric power without physical contact. They can be used for various applications, such as supply…

    14 Apr 2009

    • Application Catalog

    139 – Power Transmission Analysis Using Magnetic Resonance Phenomena

    OverviewRecently, magnetic resonance is gaining attention as a new type of wireless transmission technology. Magnetic resonance differs from conventional types of electromagnetic induction transmissi…

    3 Dec 2009

    • JMAG Users Conference Proceedings

    Development and Performance Evaluation of a Contactless Inductive Power Supply (IPS) System for Electric-driven Vehicles

    Yushi Kamiya,Waseda University

    10 Dec 2009

    • JMAG Users Conference Proceedings

    Electromagnetic design method of wireless charging coil mounted under a vehicle

    Hiroaki Yuasa, Nobuhiro Kibudera, BR Electric Vehicle・Charge System Development Dept, TOYOTA MOTOR CORPORATION, Norihito Kimura, Nippon Soken, Inc.

    15 Feb 2016

    • JMAG Users Conference Proceedings

    Development of a wireless power transfer technology and electromagnetic field analysis

    Tomio Yasuda, New Technology Development Department, Technova Inc.

    • JMAG Users Conference Proceedings

    Introduction to the Difference between Electromagnetic Induction and Magnetic Resonance Coupling

    Takehiro Imura, Department of Electrical Engineering & Information Systems, School of Engineering, The University of Tokyo

    • JMAG Users Conference Proceedings

    Magnetic Analysis for Wireless Power Transfer via Magnetic Resonant Coupling – Effect of Foreign Object –

    Takehiro Imura, The University of Tokyo

    14 Feb 2018

    • Application Catalog

    190 – Arrangement Optimization of Wireless Power Transfer System

    This document introduces the procedure in obtaining the optimum solution for geometries of transmission coils (angle that defines position) for simple magnetic resonance wireless power transfer syste…

    8 Mar 2018

    • Application Catalog

    196 – Analysis of coil stray capacitance

    OverviewIn a high frequency application, not only the coil's inductance component but its capacitance component cannot be ignored and results in degradation of the circuit impedance characteristics a…

    9 Mar 2018

    • Application Catalog

    199 – Efficiency Analysis of Wireless Power Transfer via Electromagnetic Induction Method using Resonance Circuits

    OverviewIn recent years, electromagnetic induction type transmission is considered for applied use in wireless power supply systems for electric vehicles (hereinafter, referred to as EV) and plug-in …

    • Application Catalog

    224 – Wireless Power Transfer Device Stray Loss Analysis

    In this example, an example is presented investigating by using electromagnetic field analysis whether stray loss can be suppressed using an aluminum shield.

    18 Feb 2019

    • JMAG Users Conference Proceedings

    Effects of the Aluminum Coil on the WPT System

    Atsushi Ogasahara, Tabuchi Electric co., ltd.

    7 Mar 2019

    • JMAG Users Conference Proceedings

    Optimum Design of Wireless Power Transfer Coils for EVs Calculated by JMAG

    Toshiyuki Fujita, Technova Inc.

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