A model predictive control of an LLC resonant inverter for tin melting application

This paper presents a model predictive control of a resonant inverter with LLC load configuration. The targeted application is an induction furnace. The proposed control requires neither phase-locked loop control nor PI tuning since the LLC load model is used to predict future current values for the load. An objective function is formulated such that a proper operating frequency reflecting the targeted current to the load is obtained. The Spike current on the switching devices caused by load parameter variation at Curie's temperature has been eliminated by a phase limit control. The proposed controls have been validated through computer simulation and experiment. With the proposed predictive control, the experimental results of heating a 300-gram Tin from room temperature until its melting point at 232 °C are provided.

[1]  S. Nuttawong,et al.  A dsPIC-based constant power controller for induction heating applications , 2012, 2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology.

[2]  Sumate Naetiladdanon,et al.  Asymmetrical duty cycle control with phase limit of LLC resonant inverter for an induction furnace , 2016, 2016 13th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON).

[3]  Gholamreza Arab Markadeh,et al.  An improved model predictive control of an inverter with LC filter , 2017, 2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC).

[4]  J. Acero,et al.  Asymmetrical voltage-cancellation control for full-bridge series resonant inverters , 2004, IEEE Transactions on Power Electronics.

[5]  J. Acero,et al.  Efficiency optimization of half-bridge series resonant inverter with asymmetrical duty cycle control for domestic induction heating , 2009, 2009 13th European Conference on Power Electronics and Applications.

[6]  J. M. Espi Huerta,et al.  Design of the L - LC Resonant Inverter for Induction Heating Based on Its Equivalent SRI , 2007 .

[7]  J. A. Sabate,et al.  Design of a 10 kW, 500 kHz phase-shift controlled series-resonant inverter for induction heating , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[8]  Sung-Yeul Park,et al.  Adaptive PI gain control to realize sinusoidal ripple current charging , 2015, 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia).

[9]  Rui Yang,et al.  Induction heating appliances with phase-shifted control based on time-sharing control , 2013, 2013 25th Chinese Control and Decision Conference (CCDC).

[10]  Gan Wei,et al.  Model predictive control of single phase grid-connected inverter , 2014, 2014 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC).

[11]  Hua Han,et al.  Model predictive current control of third-harmonic injection two-stage matrix converter , 2016, 2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC).

[12]  Anawach Sangswang,et al.  An Improved $LLC$ Resonant Inverter for Induction-Heating Applications With Asymmetrical Control , 2011, IEEE Transactions on Industrial Electronics.

[13]  Chayant Koompai,et al.  An improved LLC resonant inverter for induction heating with asymmetrical control , 2009, 2009 IEEE International Symposium on Industrial Electronics.