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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    • 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

    • 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

    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, Electrical Engineering & Information Systems, Graduate School of Engineering, APET, The University of Tokyo

    14 Feb 2018

    • Application Catalog

    190 – Arrangement Optimization of Wireless Power Transfer System

    OverviewA solenoid type injector used in engines opens a valve and injects fuel by moving a plunger with magnetic force created by an electromagnet. Originally there were only two types of wireless p…

    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 – Stray Loss Analysis of Wireless Power Transfer

    OverviewIn recent years, using an electromagnetic induction type power supply system has been studied in Wireless Power Transfer systems for electric vehicles (hereinafter referred to as EVs) and plu…

    13 Mar 2018

    • JMAG White Papers

    [W-SE-73] Influence of Element Shapes Near the Coil on Convergence

    1. IntroductionMesh is essential for the accuracy and convergence of iterative calculations such as ICCG in the finite elementmethod. If the necessary resolution for required areas is not appropriate…

    26 Mar 2018

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