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Modeling & Calculation of the Magnetic Field Given by an Helmholtz Coil for Orthoferite Daniel Victoras ENE Vice-Chair of the IEEE-CPMT SBC Department of Electronic Technology Politehnica University of Bucuresti Splaiul Independentei 313, 77206, Bucharest, Romania Phone +004014116674, Fax +004014115182 E-mail: victoras@cadtieccp.pub.ro WWW: http://cadtieccp.pub.ro victoras@cadtieccp.pub.ro WWW: http://cadtieccp.pub.rovictoras@cadtieccp.pub.ro WWW: http://cadtieccp.pub.ro Daniel Victoras ENE Vice-Chair of the IEEE-CPMT SBC Department of Electronic Technology Politehnica University of Bucuresti Splaiul Independentei 313, 77206, Bucharest, Romania Phone +004014116674, Fax +004014115182 E-mail: victoras@cadtieccp.pub.ro WWW: http://cadtieccp.pub.ro victoras@cadtieccp.pub.ro WWW: http://cadtieccp.pub.rovictoras@cadtieccp.pub.ro WWW: http://cadtieccp.pub.ro IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Goals Biot-Savart formula Numerical and Analytical Computation 1 st Model Variation of the Magnetic Field Components 2D and 3D Model Simulation Results IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Modeling of the Magnetic Field for Half of a Winding Diagram for evaluating the vectors from Biot-Savard formula IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Vectorial Product Calculation IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Comparation between Numerical and Analytical Methods Analytical formula r=d/2 Our case x=z1 r=d/2 Our case x=z1 IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Comparation between Numerical and Analytical Methods Both of them The relative error obtained when using the numerical method IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Modeling of the Magnetic Field for More Windings IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Modeling of the Magnetic Field for More Windings Up side: diameter(n) = 2*[raz+(n-1)*D1] diameter(n) = 2*[raz+(n-1)*D1] shift in y = 0 shift in y = 0 Down side: diameter(n) = 2*[raz+0.5*(2*n-1)*D1] diameter(n) = 2*[raz+0.5*(2*n-1)*D1] shift in y = -0.5*D1 shift in y = -0.5*D1 IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Variation of the B components along x,y and z axis are for the Up side. IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Variation of the B components along x,y and z axis are for the Down side. IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Modeling of the Magnetic Field – 2 sides of the Coil IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Bztotal along x axis (TOP) Bytotal along y axis(TOP) Bxtotal along y axis (TOP) Variation of the Btotal components along x,y and z axis for TOP & BOTTOM side. Fig 9. Bztotal along x axis (BOTTOM) Bytotal along y axis (BOTTOM) Fig 11. Bxtotal along y axis (BOTTOM) Bztotal along z axis (BOTTOM) Bxtotal along y axis (BOTTOM) IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Modeling of the Magnetic Field – one dimension IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Modeling of the Magnetic Field – two dimension IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Variation of the Magnetic Field on Number of Windings IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Inductance of the Planar Inductor IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Variation of the Inductance on Number of Windings IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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What is needed? Induction of the Coil 1mT….10mT for 1mmX1mm square Constant Value of the Magnetic Field no more than 10% relative error Low Value of the Inductance IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Simulation Results zp=0 the field in the XOY plane; raz=0.001 the radius of the first half circle D1=0.00025 distance between the radius; N1=3 number of windings; h=0.001 the thickness of the substrate; t=0.0003 the thickness of the track coil; w=0.00003 the width of the cooper pellicle; n1=n2=10 the number of the divisions I1=1A current pulse IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Simulation Results IEEE-CPMT Student Branch Chapter Meeting November, 1 st, 2002

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Design: Daniel Victoras Ene (victoras@cadtieccp.pub.ro) Design: Daniel Victoras Ene (victoras@cadtieccp.pub.ro) Thank you for your attention ! Thank you for your attention !

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