Optimized Design of Induction Cooker by Numerical Computation and Experimental Investigation

Abstract:

Optimized design of litz-wire inductor and optimal choose of working frequency is required to improve the efficiency of induction cooker. A new formula to calculate the dynamic inductance is deduced from the basic definition of the inductance, considering the case that the pot may be lifted with the inductor in working state. A method to calculate the loss of the inductor and to achieve the optimized the diameter of the litz wire by numerical calculation is presented. Take advantage of the calculation results, the resonant frequency for the induction heating system can be determined. An experimental prototype was built to verify the calculation method.

• Periodical: Applied Mechanics and Materials (Volumes 313-314)
• Pages: 1025-1029
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.313-314.1025
• Online since: March 2013
• Authors: Dong Liang Li, Xiao Guang Yang
• Keywords: Finite Element Method (FEM), Induction Cooker, Litz-Wire, Resonant Frequency

References

[1] H. W. E. Koertzen, J. D. van Wyk, and J. A. Ferreira, "An investigation of the analytical computation of inductance and AC resistance of the heat-coil for induction cookers," Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting, vol. 1, pp.1113-1119, Oct. 1992.

DOI: 10.1109/ias.1992.244423

[2] Y. Li, Y. Peng, and H. Li, "Research on increasing frequency-tracking speed for series resonant inverter," Transactions of China Electrotechnical Society, vol. 19, no. 11, pp.77-81, Nov. 2004.

[3] J. M. Burdio, L. A. Barragan, F. Monterde, D. Navarro, and J. Acero, "Asymmetrical voltage-cancellation control for full-bridge series resonant inverters," IEEE Transactions on Power Electronics, vol. 19, no. 2, pp.461-469, March 2004.

DOI: 10.1109/tpel.2003.823250

[4] S. Wang, S. Ji, and Y. Li , "Numerical analysis of eddy current losses for power transformer winding with round stranded conductors," High Voltage Engineering, vol. 29, no. 5, pp.7-10, Apr. 2003.

[5] F. Tourkhani and P. Viarouge, "Accurate analytical model of winding losses in round litz wire windings," IEEE Trans. Magn., vol. 37, no. 1, p.538–543, Jan. 2001.

DOI: 10.1109/20.914375

[6] J. P. Keradec, E. Laveuve, and J. R. Roudet, "Multipolar development of vector potential for parallel wires. Application to the study of eddy currents effects in transformer windings," IEEE Trans. Magn., vol. 27, no. 5, p.4242–4245, Sep. 1991.

DOI: 10.1109/20.105038

[7] J. A. Ferreira, Electromagnetic Modeling of Power Electronics Converters. Norwell, MA: Kluwer, 1989.

[8] P. Holmberg, M. Leijon, and T. Wass, "A wideband lumped circuit model of eddy current losses in a coil with a coaxial insulation system and a stranded conductor," IEEE Trans. on Power Delivery, vol. 18, no. 1, pp.50-60, 2003.

DOI: 10.1109/tpwrd.2002.803753