﻿ IH Cooking HeaterExamples | Product | Murata Software Co., Ltd.

# Example2IH Cooking Heater

General

• This is an example of the magnetic field-thermal analysis.

• The joule loss due to the induction current is solved by magnetic analysis. The resulting temperature rise is calculated by thermal analysis.

• The vectors of the magnetic field and the temperature distribution by the heating are viewed.

• Unless specified in the list below, the default conditions will be applied.

### Analysis Space

 Item Settings Analysis Space 3D Model unit mm

### Analysis Conditions

 Item Settings Solvers Magnetic Field Analysis [Gauss] Thermal Analysis [Watt] Analysis Type Magnetic field analysis: Harmonic analysis Thermal analysis: Steady-state analysis Options N/A

The frequency of the current is set to 10[kHz].

 Tab Setting Item Settings Harmonic analysis Frequency Minimum: 10×10^3[Hz] Maximum: 10×10^3[Hz] Step Linear step: Division number: 0

Set the Mesh Tab as follows.

Select “Apply the surface impedance boundary” for faster calculation.

“Apply the surface impedance boundary” is selectable when there is no induced current on the conductor.

See “Frequency-Dependent Meshing” of [Mesh Tab].

 Tab Setting Item Settings Mesh Meshing Setup Automatically set the general mesh size: Deselect General mesh size: 20[mm] Frequency-Dependent Meshing Reference frequency: 10×10^3[Hz] Surface treatment for conductors: Apply the surface impedance boundary

### Model

Solid bodies of a frying pan (Metal) and a coil (Coil) are defined.

The automatically created ambient air is analyzed only in the magnetic field analysis, not in the thermal analysis.

### Body Attributes and Materials

Finer meshes are set on the area where the magnetic field changes drastically.

 Body Number/Type Body Attribute Name Material Name 1/Solid Coil1 008_Cu * 3/Solid Coil2 008_Cu * 11/Solid METAL METAL 10/Solid Handle Wood

* Available from the Material DB

The material properties are set up as follows:

 Material Name Tab Properties Wood Thermal Conductivity Thermal Conductivity: 0.5[W/m/deg] METAL Permeability Relative Permeability: 5×10^3 Conductivity Conductivity Type: Conductor Conductivity: 1×10^7 Thermal Conductivity Thermal Conductivity: 80

Body attribute is set up as follows to apply current to the loop coil.

The analysis domain is the magnetic field analysis only as Coil is not used in the thermal analysis.

 Body Attribute Name Tab Settings Coil Current Waveform: AC Current: 10[A] Turns: 20[Turns] Induced current: N/A Direction: Loop Coil/Magnetic Field Direction Direction Vector of Magnetic Field: X=0, Y=0, Z=1 Analysis Domain For use in magnetic field analysis

### Boundary Conditions

“Natural convection (automatic calculation)” is set on the outer boundary condition (surrounding the frying pan in the case of the thermal analysis).

 Boundary Condition Name/Topology Tab Boundary Condition Type Settings Outer Boundary Condition * Thermal Heat Transfer/Ambient Radiation Natural convection (automatic calculation) Room Temperature : 25[deg]

To set Outer Boundary Condition, go to the [Model] tab

and click [Outer Boundary Condition] .

### Results

The vectors of the magnetic field are shown below.

The vectors of the current density are shown below.

The eddy current is induced in the pan.

The temperature contour as a result of Watt is shown below.

The temperature goes up to around 110[deg].

﻿