Research And Design Of Medium Frequency Electromagnetic Induction Heating Power Supply

Compared with traditional heating technology,intermediate frequency electromagnetic induction heating technology has the advantages of high efficiency,greenness,and safety.It has been widely used in all walks of life.One of the keys to induction heating technology is the research and manufacture of medium frequency electromagnetic induction heating power supplies.Currently,the state vigorously promotes energy conservation and environmental protection projects and provides policy support.While electromagnetic induction heating power supplies are used in various related fields with their non-polluting advantages,power supplies are gradually developing in the direction of high reliability.Besides,the development needs of high-frequency intelligence must be taken into account.Furthermore,higher requirements are placed on the circuit structure of the power supply and related control methods.According to the load characteristics of RLC,the power supply is made to work in a resonant state,and the relevant characteristics of electromagnetic induction are used for heating.This paper has carried out relevant research and design for electromagnetic induction heating power supply,and the corresponding contents are as follows:The two topologies of common electromagnetic induction heating circuits in the main power supply are analyzed and compared in this paper.By comparing their advantages and disadvantages,the series resonance induction heating topology is finally selected.The relevant theories are introduced in the paper.And analysis.At the same time,the characteristics of some power adjustment methods are compared and analyzed,and finally,the control method of inductive phase-shift PWM power adjustment is selected.And according to the characteristics of the circuit,the selection of the main internal components and related parameters are calculated.Based on the above-mentioned theory,with STM32F103 as the main control chip,the main control circuit of intermediate frequency electromagnetic induction heating is designed.Besides,for the selected IGBT module,a drive and control circuit for phase-shifting and power-adjusting is designed.Including the corresponding detection module and drive circuit protection circuit.Besides,the current detection circuit and overcurrent protection circuit of the circuit is designed to increase the stability of the power supply system.At the same time,the program design is developed in C language to complete the programming of various functions and carry out related functional tests.Including frequency tracking,current protection,drive protection detection,communication display,and other functions.Finally,solder and debug the designed PCB.Establish an experimental platform,complete the software function test and hardware function test of the system,and carry out relevant experimental verification.By comparing the observation results of the waveform with the theoretical analysis,the feasibility of the theoretical analysis and system design and the reliability of the protection functions are verified.