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Complex relative magnetic permeability
Posted 2017年11月2日 GMT-4 06:07 Electromagnetic Heating Version 5.3 0 Replies
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Hi, my name is Jesus and I'm mainly working in induction heating. We have simulated a 2D induction heating system with an ideal coil (i.e. modeled as a constant current density) and we have tried to calculate the resistance contribution which represents the power dissipation on the workpiece. Workpiece is modeled as a linear material with constant electrical conductivity and magnetic permeability. We have checked up to four methods: -Real part of the Poynting's vector flux. -Real part of the coil voltage divided by the coil current, i.e., the real part of the ideal coil impedance. -Volume integration of the volumetric loss density mf.Qh in the workpiece. -Volume integration of Joule's loss, defined as the product of the electrical field (mf.Ephi) and the conjugate of the current density (mf.Jphi) in the workpiece.
Results of four methods are identical excepting when complex magnetic permeability is assigned to the workpiece (for example mur= 1000-1000i). In this case, the method four gives a different result, even using induced current density mf.Jiphi. Why is it different?
Hello Jesus Acero
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