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Your Position: Home - Industrial Heater - What Is Induction Heating? | How Does It Work?

What Is Induction Heating? | How Does It Work?

Author: Justin

May. 13, 2024

What Is Induction Heating? | How Does It Work?

To heat non-conductive materials such as plastics or glass, induction heat a graphite susceptor which transfers the heat to the non-conducting material. 

For more induction.cominformation, please contact us. We will provide professional answers.

Induction heating is used very effectively in many processes like brazing, soldering and shrink fitting. From something as small as a hypodermic needle to a large wheel on a tank. Many companies in the automotive industry, medical device industry and aeronautics make efficient use of induction heating in their processes. 

This helps explain how induction heating works.

How Does Induction Heating Work?

The Principle Behind Induction Heating

Induction heating works on the principle of electromagnetic induction. When an alternating current passes through a coil, it creates a dynamic magnetic field around the coil. If a conductive material, such as metal, is placed within this magnetic field, electric currents (called eddy currents) are induced within the material. The resistance to these currents within the conductive material generates heat, effectively raising its temperature.

Components of an Induction Heating System

An induction heating system typically comprises several key components:

  • Induction Coil: Also known as the work coil, this is the component that creates the alternating magnetic field.
  • Power Supply: Provides power to the induction coil and controls the frequency and power levels.
  • Water Cooling System: Used to cool the coil to prevent overheating during operation.
  • Workpiece: The material or component to be heated.

Factors Affecting Induction Heating

The effectiveness and efficiency of induction heating depend on several factors:

  • Frequency of AC Power: Higher frequencies are used for heating smaller components or thin workpieces, while lower frequencies are suitable for larger or thicker workpieces.
  • Material Properties: The magnetic permeability and electrical resistivity of the workpiece material affect the heating process.
  • Coil Design: The shape and size of the induction coil must be optimized for the specific heating application.

Induction Heating | Metalworking, Heat Treatment, Melting

induction heating, method of raising the temperature of an electrically conductive material by subjecting it to an alternating electromagnetic field. The electric currents induced in the object (although it is electrically isolated from the source of the field) bring about dissipation of power in the form of heat. Induction-heating methods are applied most widely in metalworking to heat metals for soldering, tempering, and annealing. The method is also employed in induction furnaces for melting and processing metals.

The principle of the induction-heating process resembles that of the transformer. A water-cooled coil, or inductor, acting as the primary winding of a transformer, surrounds the material to be heated (the workpiece), which acts as the secondary winding. Alternating current flowing in the primary coil induces eddy currents in the workpiece, causing it to become heated. The depth to which the eddy currents penetrate, and therefore the distribution of heat within the object, depends on the frequency of the primary alternating current and the magnetic permeability, as well as the resistivity, of the material. Induction hardening, widely used to increase the resistance of steel objects to wear, can be effected by brief exposure to a high-frequency field.

If you are looking for more details, kindly visit induction forging furnace.

Britannica Quiz

Electricity: Short Circuits & Direct Currents

The related method of producing heat in nonconductors is called dielectric heating.

Contact us to discuss your requirements of induction heating furnace for forging. Our experienced sales team can help you identify the options that best suit your needs.

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