Diseño e implementación de un prototipo de cocina de inducción electromagnética basado en un inversor monofásico de alta frecuencia

Abstract

All parameters of current, voltage, working frequency, etc. were calculated. Which helped design the necessary circuits (resonant-monophasic inverter) for the induction cooker prototype. With this data simulations were generated in order to confirm (as far as the simulation allowed) and adjust the results of the design obtained. After obtaining the designs of the circuits, an intermediate step was carried out between the construction of the circuits on PCB, which consisted of the assembly of these in protoboard and the design and implementation of the interface for manipulation and data collection, it is worth highlighting that both PIC18F4550 and an ATMEGA 328P-PU were used for both the inverter circuit and the interface circuit, which, thanks to their cost, help to make the final price of the appliance affordable for households in our country in an industrial implementation, subject of vital importance to achieve the social, environmental and economic impacts that were raised at the beginning of this project. Finally, thanks to the interface made in the previous step, the manipulation of the prototype of the functions is achieved: on, off, temperature control (data collection by means of a type K thermocouple and an NTC thermistor) and cooking time. By means of this the measurement and data collection of the prototype was carried out to calculate the efficiency of the system, comparison of the heating time of two pots with different density, a Swiss Home brand with a capacity of 2.2 liters of stainless steel, with 1.25 cm thick thermo diffuser at the base; the second, of stainless steel without thermo-diffuser checking the working frequency at the different programmed levels, comparison with type K thermocouple pattern (-40 ° C to 1000 ° C) attached to a multimeter with precision in the ranges of -40 ° C - 0 ºC [+ - 3% + 9] 0ºC - 400 ºC [+ - 1% + 5] and 400ºC - 1000 ºC [+ - 2% + 10], consumption currents at their different levels of work, voltage in the induction coil and hysteresis of the on-off control. These data are shown in tables and processed in order to obtain the correct averages and measurements of each of the variables.