Research and Design on IGBT Induction Heating Power Supply

Research and Design on IGBT Induction Heating Power Supply https://dw-inductionheater.com/research-and-design-on-igbt-induction-heating-power-supply.html?feed_id=266356&_unique_id=6782d513e2d17

Research and Design on IGBT Induction Heating Power Supply

Research and Design on IGBT Induction Heating Power Supply

Introduction

Induction heating technology having the advantage which traditional methods don’t have, such as high heating efficiency, high speed, controllable and easy to realize automation, is an advanced heating technology, and thus it has a wide range of application in the national economy and social life.

Parallel medium frequency induction heating equipment (1~10kHz) has the advantages such as [0]low requirement on capacity of the power devices, easy to be paralleled to expand capacity, high adaptability to load and so on, so an increasing number of applications is received in induction heating power supply. Emerged in the early 80s, the entire control of power electronic semiconductor devices IGBT, with its high-speed, high input impedance, easy to drive, low on-state voltage drop and other outstanding features, has now a wide range of applications over the IF and VHF fields, and let the induction heating technology has a new leap [1] [2] .The research on the induction heating power supply has been deepening in China. With the object of 100 kW / 8 kHz shunt induction heating power supply, the key technologies of the development of medium frequency induction heating power supply will be discussed as followed……

Research and Design on IGBT Induction Heating Power Supply

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induction heating system technology PDF

Induction Heating Technology Review

1. Introduction

All IH (induction heating) applied systems are developed using electromagnetic induction which was first discovered by Michael Faraday in 1831. Electromagnetic induction heating refers to the phenom- enon by which electric current is generated in a closed circuit by the fluctuation of current in another circuit placed next to it. The basic principle of induction heating, which is an applied form of Faraday’s discovery, is the fact that AC current flowing through a circuit affects the magnetic movement of a secondary circuit located near it. The fluctuation of current inside the primary circuit provided the answer as to how the mysterious current is generated in the neighboring secondary circuit. Faraday’s discovery led to the development of electric motors, generators, transformers, and wireless communications devices. Its application, however, has not been flawless. Heat loss, which occurs during the induction heating process, was a major headache undermining the overall functionality of a system. Researchers sought to minimize heat loss by laminating the magnetic frames placed inside the motor or transformer. Faraday’s Law was followed by a series of more advanced discoveries such as Lentz’s Law. This law explains the fact that inductive current flows inverse to the direction of changes in induction magnetic movement.

Heat loss, occurring in the process of electromagnetic induction, could be turned into productive heat energy in an electric induction heating system by applying this law. Many industries have benefited from this new breakthrough by implementing induction heating for furnacing, induction quenching, and weld- ing. In these applications, induction heating has made it easier to set the heating parameters with- out the need of an additional external power source. This substantially reduces heat loss while maintaining a more convenient working environment. Absence of any physical contact to heating devices precludes unpleasant electrical accidents. High energy density is achieved by generating sufficient heat energy within a relatively short period of time……

Induction Heating System Technology

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