**5. Inductor modeling with field concentrator**

Given the advantages of concentrator field magnetodielectric materials, in this case study was modeled an inductor, witch use a concentrator field made by magnetodielectric material, by the type obtained, by using modeling and numerical simulation with FLUX2D software[4].

The field concentrator made of magnetodielectric material, have the following materials data:



Magnetodielectric Materials – Use in Inductive Heating Process 87

Geometry made for this case is shown in Figure 10.

**Figure 10.** Inductor geometry for monolayer inductor with field concentrator

**Figure 11.** The power density distribution

Was analyzed for this case, the power density distribution in the work piece - Figure 11. , and temperature variation on a point on the surface during the heating process - Figure 12.

**Table 5.** Measured and calculated values

**Figure 9.** Dependence B = f (H).

Geometry made for this case is shown in Figure 10.

86 Dielectric Material

Φ [mWb] *B[T]* H

**Table 5.** Measured and calculated values

**Figure 9.** Dependence B = f (H).

[A/cm]

5 1,05 0,9 105 5 0,52 0,4 105 4,5 0,9 0,7 94,58 4,5 0,45 0,3 94,58 4 0,75 0,6 84 4 0,6 0,5 84 3,5 0,75 0,6 73,56 3,5 0,6 0,5 73,56 3 0,6 0,5 63 3 0,52 0,4 63 2,5 0,45 0,3 52,54 2,5 0,3 0,2 52,54 2 0,3 0,2 42 2 0,15 0,1 42 1,5 0,15 0,1 31,52 1,5 0,15 0,1 31,52 1 0,01 0,08 21 1 0,01 0,08 21

I[A] Φ

[mWb]

*B[T]* H

1 0,15 0,1 21 1 0,15 0,1 21 1,5 0,01 0,08 31,52 1,5 0,3 0,2 31,52 1,5 0,15 0,1 31,52 2 0,01 0,08 42 2 0,45 0,3 42 2 0,3 0,2 42 2,5 0,15 0,1 52,54 2,5 0,75 0,6 52,54 2,5 0,37 0,3 52,54 3 0,15 0,1 63 3 0,9 0,7 63 3 0,37 0,3 63 3,5 0,15 0,1 73,56 3,5 1,2 1 73,56 3,5 0,6 0,5 73,56 4 0,15 0,1 84 4 1,35 1,1 84 4 0,6 0,5 84 4,5 0,3 0,2 94,58 4,5 1,35 1,1 94,58 4,5 0,6 0,5 94,58 5 0,3 0,2 105

[A/cm]

I[A] Φ

[mWb]

*B[T]* H

[A/cm]

I [A]

**Figure 10.** Inductor geometry for monolayer inductor with field concentrator

Was analyzed for this case, the power density distribution in the work piece - Figure 11. , and temperature variation on a point on the surface during the heating process - Figure 12.

**Figure 11.** The power density distribution

Magnetodielectric Materials – Use in Inductive Heating Process 89

 The initial temperature of the work piece and the concentrator of magnetodielectric material used were 120C. Final temperature of the work piece at the end of heating processing was 8400C, temperature reached during the 80s. Final temperature of the outer

The primary endpoint of this chapter is evidence increased electrical energy conversion efficiency, in the inductor-piece ensemble, that use a magnetodielectric material field

For the heating inductive process, without magnetodielectric field concentrator calculated is:

There is a significant increase of 15% for hot and cold regime of electrical energy conversion

These values increase efficiency reveal clearly the advantage of using electromagnetic processing systems for heating that are made up of field concentrators made by

[1] Valery I. Rudnev – An objectiv assessmeant of magnetic flux concentrators – heat

[3] D.Hoble, C. Stasac - Modern materials utilised in electromagnetic field concentrators - Revista " Acta Electrotehnica", Cluj Napoca, Vol.48, Nr.1-2007 ISSN 1841-3323

[5] D.A.Hoble – Contributions to increase energy conversion efficiency of inductive heating

surface of the concentrator field at the end of the heating process was 140C.

**magnetodielectric field concentrators use** 

concentrator of the type obtained as explained above.

η i could reg = 96% η i hot reg = 69%

η i could reg = 81% η i hot reg = 54%,

magnetodielectric materials

D.A. Hoble and M.A. Silaghi *University of Oradea, Romania* 

Treating Progress - 2004

inductors - PhD Thesis 2001.

[6] htpp://fluxtrol.com

[2] http://www.alpha1induction.com/concentrator\_top.html

[4] Flux2D User,s Guide , CEDRAT , MEYLAN F-38246 , France , 2006

**Author details** 

**7. References** 

efficiency, the inductor-piece ensemble.

Efficiency for this case, determined from data modeled is:

**6. The electrical efficiency in inductive heating processes who** 

**Figure 12.** Temperature variation

Based on the results of modeling and simulation was made an inductor with magnetodielectric material concentrator. The image of this inductor during the heating process is shown in the figure below.

**Figure 13.** The inductor during the heating process

Current drawn from the supply of inductive heating during the process was 60A, and the measured line voltage was 378V.

 The initial temperature of the work piece and the concentrator of magnetodielectric material used were 120C. Final temperature of the work piece at the end of heating processing was 8400C, temperature reached during the 80s. Final temperature of the outer surface of the concentrator field at the end of the heating process was 140C.
