Induction Heating

Induction heating has been used for various purposes from production technology such as quenching and shrink fitting through to the design of home appliances as in Induction cooking system.
Induction heating is the technology based on the eddy current, and it becomes a key issue for design to control the eddy current accurately.
However, since the eddy current depends on factors such as geometry, material characteristics, frequency, and temperature, its behavior is complicated.
Such complicity makes it difficult to appropriately control the quantity and location of eddy current.
JMAG correctly reproduces and visualizes the induction-heating phenomenon that changes intricately, and realizes the optimal design for various purposes using induction heating.

Evaluation items

Temperature distribution, heat generation density distribution, eddy current distribution within the work piece, current density distribution inside of wires, magnetic flux density, flux line, heating efficiency, input power, heat source, electromagnetic force.

Case Studies / Functions

Induction hardening of a crankshaft

High-frequency induction hardening rapidly heats up parts contacting with a piston as a crankshaft rotates. Examines the hardened area based on the temperature distribution results obtained.

JMAG function :Rotational motion

Validates uniform quenching of parts contacting with a piston in an analysis, rotating induction heating needs to be taken into account.

JMAG function : Skin mesh function

Optimizes local heating, it requires accurate management of the eddy currents concentrating near the surface of the work piece. Our skin mesh function generates mesh and accurately predicts eddy current distribution, which is vital to simulate the high-frequency quenching process.

Optimal design of edge heater

When designing an edge heater, design parameters such as coil geometry, current conditions and feeding speed are vital issues.
An edge heating analysis simulates the induction heating process of a long steel sheet being conveyed taking account for such parameters.

JMAG function : Translation motion

Simulates the process of the scanning heat treatment for steel sheets.

JMAG function : Material modeling

Supports detailed modeling taking into account temperature changes such as magnetic and electric properties, and specific heat caused by the quenching process.

Induction hardening of a gear

As a precision component, a gear requires an accurate evaluation of dimensional tolerance due to thermal deformation resulting from induction hardening.

JMAG function : Coupled thermal and magnetic field analysis

Covers work piece temperatures beyond the Curie point in high-frequency induction hardening. A two-way coupled analysis of thermal and magnetic field accounting for temperature variations in physical values is indispensable.

JMAG function : Multiple frequencies for power supply

Enables to heat both the gear tip of the wheel and the gear base by controlling the power supply frequency.

Loss distribution of steel sheet by resistance heating

Obtains the temperature distribution, joule loss distribution by running resistance heating analysis using the electric resistance of the steel sheet.

JMAG function : Joule loss analysis

Obtains the joule loss distribution by solving the electromagnetic phenomena and heat transfer phenomena simultaneously.

Uniform heating for induction cooking system

Estimation of the uniformity of temperature distribution on the pot bottom can be led from the loss distribution Confirms if no flux leakage is causing malfunctioning of electric devices surrounding the system by checking to the 3D flux lines.

JMAG function : Circuit component

Enables direct input of power when actual current and voltage are unknown.

JMAG function : Leakage flux calculation in the air ambient

Calculates with high-accuracy the leakage flux distribution on a specified point in the air by integration method.

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    • Application Catalog

    83 – Magnetic Shielding Analysis of an Induction Furnace

    OverviewAn induction furnace is an apparatus that uses high-frequency induction heating to melt metal. Running current through the coil surrounding the crucible starts electromagnetic induction pheno…

    30 Jan 2009

    • JMAG Users Conference Proceedings

    Finite Element Analysis of a Steering Rack Shaft Subjected to the High-Frequency Induction Hardening Process

    Manabu Fukumoto,Katsuhiko Kizawa,Kazuo Okamura,Atsuhiko Ohta, Sumitomo Metal Industries, Ltd/JTECT Corporation

    12 Dec 2008

    • JMAG Users Conference Proceedings

    Analysis of an induction-heating fusing unit using JMAG


    • Application Catalog

    47 – High-Frequency Induction Heating Analysis of a Crankshaft

    OverviewMachine parts like shafts and gears are made to be resistant to wear and tear. This is accomplished by giving them a certain degree of flexibility by maintaining their interior toughness whil…

    29 Aug 2008

    • Application Catalog

    49 – High-Frequency Induction Heating Analysis of a Steel Sheet

    OverviewThe rolling process of steel sheets changes the strength and properties of the product, so heat treatment is used. High frequency induction heating is a type of heat treatment that uses a hig…

    18 Apr 2008

    • Application Catalog

    50 – High-Frequency Induction Heating Analysis of a Steel Wire (Translational Induction Hardening)

    OverviewSteel wires are made to be resistant to wear and tear. This is accomplished by giving them a certain degree of flexibility by maintaining their inner toughness while increasing the hardness o…

    • Application Catalog

    85 – High-Frequency Induction Heating Analysis of a Constant Velocity Joint

    OverviewConstant velocity joints are used in the connections at each end of a drive shaft in a vehicular drive system. The inside of the outer race of a constant velocity joint makes direct contact w…

    30 Jan 2008

    • Application Catalog

    51 – High-Frequency Induction Heating Analysis of a Gear

    OverviewGears are created in such a way that the surfaces of their teeth are hard in order to resist the wear and tear that occurs when they come into contact with the teeth of other gears. However, …

    16 Jan 2008

    • Application Catalog

    13 – High-Frequency Induction Heating Analysis of a Shaft

    OverviewShafts are used in parts like axles, which transfer power from the engine to rotate the tires, so the need to have sufficient strength to handle the torsion. They also need to have increased …

    • Application Catalog

    45 – High-Frequency Induction Heating Analysis of an IH Cooking Heater

    OverviewAn IH cooking heater cooks food by heating a pot that acts as a conductive body. It heats this pot with an induction heating method that uses electromagnetic induction. Eddy currents flow in …

  1. Computer Analysis of Dual Frequency Induction Heating using JMAG-Studio

    Takashi Horino, NETUREN CO.,LTD.

    6 Nov 2007

    • 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

    • JMAG Users Conference Proceedings

    High-frequency Induction Heating, etc.

    Ishikawajima-Harima Heavy Industries Co., Ltd.

    22 Feb 1999

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