Design of Induction Cooker for All Types of Metal

The thesis presents a detailed design of 1.5kW induction cooker capable of heating all types of metals employed in the everyday cooking vessels. The design is based on newly developed control approach for resonant LLC DC-DC converters by NXP Semiconductors. The approach reduces the close loop transfer function of resonant converter to first order enabling control of resonant networks with very high quality factors. Additionally, the developed control idea regulates the power delivered to load in every cycle without the need of a power feedback. In that way the controller alleviates problems associated with power measurement and control in induction heating application, especially at high quality factors. The applicability of the control approach for induction heating application and resonant inverters is theoretically and practically verified by computer simulations and practical design. In the theoretical design possible approaches for estimation of required current ratings in the load, design of coil aiming for maximum efficiency and dimensioning of suitable resonant inverter are outlined. The output of theoretical investigation is used in the practical design of a complete induction cooking system. During the practical verification a power of 1kW was developed in aluminum cooking vessel which was limited by the maximum power ratings of the available DC power sources.Electrical Power ProcessingElectrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc