The Working Principle and Advantages of Induction Heater
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Induction Heating Machine Working Principle Principle
Induction heater, as the name suggests, is a machine for heating. It is not heated by traditional fire, but heated by high-frequency alternating current. But it is different from traditional heating, and it is much faster than traditional heating. (The machine can heat up to about one thousand degrees Celsius in a few seconds). Its characteristic is that the surface of the heated object is very hot and the temperature rises quickly. But the temperature inside rises slowly. This feature makes it very well used in the field of metal surface quenching.

Let's introduce how induction heating works in detail for you.

Induction heaters are also called induction China heating machine, which are widely used in machinery manufacturing, welding, and pipe manufacturing. When it works, it uses alternating current to generate an electromagnetic field. When we put the metal original into the device, this electromagnetic field will affect the metal original's own magnetic field, causing a magnetic vortex inside the metal original. In this way, the molecules begin to become active, which in turn heats up the metal workpiece rapidly.

Its heating effect is related to the size of the current, the size of the magnetic field, and the frequency of the magnetic field. (I need to remind everyone here that only the original metal can be heated, because only the metal inside has this kind of magnetic field.) Finally, since the heater itself is also made of metal, the device itself will also generate heat, so at the end, cooling water is required for the machine to cool down.

The Temperature Control Method of Induction Heating Machine
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As the popularity of induction heating machines gradually rises in different industry areas, the temperature requirements for different workpieces has also gotten higher and higher. To better control the temperature during the heating process, you can use the following two methods:

1. Induction heating temperature control: According to the temperature rise curve of the heating process, use infrared temperature measurement or thermocouple for temperature sampling and convey the corresponding feedback to the industrial induction heating machine China. Then, control the heating process by adjusting the working time and power of the equipment through the single-chip microcomputer. Typical applications of this method: Preheating of the metal heating machine before welding and heat preservation after welding

2. Heating temperature online and induction heating control: According to the heating process temperature requirements, use infrared temperature measurement or thermocouple to take temperature sampling and send feedback to the induction heating equipment. Then, adjust the start and stop of the equipment through the single-chip microcomputer control equipment. Typical applications of this method: melting and welding heat preservation.

The Main Components Of Induction Heating Machine
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The design and manufacturing requests of an industrialized induction heating machine are usually very complicated. Let us show you the four main functional modules:

Rectification Part of Induction Heating Machine
This part of the induction heating machine is responsible for converting the alternative 50/60HZ current into DC current through the rectifier. Cooperating with the filter capacitor modular calculated by JKZ engineers, the rectification part of an induction heat machine normally offers continuous stable DC current for the followed-up modular.

Converter Part of Induction Heating Machine
The capacitor inverts the DC current into a high-frequency AC current by the MOSFET, IGBT, resonant inductance. The basic frequency is designed according to the applications. For different applications, the choices for the frequencies of the induction heating machines are also different. After the basic frequency confirmed, we need to match it with a different capacitor and inductance. As a professional china induction heater manufacturer, JKZ offers high-quality induction heaters with different frequencies. Our production line includes high-end high-frequency induction heating machine, machine for medium frequency induction heating, ultra high frequency induction heating machine, etc.

The Difference Between Medium Frequency Induction Heating Machine and High Frequency Induction Heating Machine
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What Is High Frequency Heating?
The induction heating power supply originated in the 1950s and has now become a more popular heating power supply in industrial production. Its heating products are green and environmentally friendly, without waste smoke, exhaust gas, noise, or dust. So what is the difference between medium frequency induction heating machine and high frequency induction machine?

1. Medium frequency induction heating power supply

The frequency is relatively low, the projection depth of the induced current is large, and the heat transmission depth is relatively high. For large-size workpieces, the penetration is good. The frequency range of the medium frequency induction heating machine is generally between 1kHz and 10kHz, most of which are used for large tempering, quenching, tempering, heating, annealing of modular gears, large diameter thick wall pipes, large workpieces and large diameter shafts, and hot forging, smelting, and quenching of large layer depths.

2. Super audio induction heating frequency power supply

The working frequency band is mainly concentrated between 6KHz~60KHz. Compared with the equipment of 1~10KHz, this frequency band works without operating noise, and the current transmission depth is above 2mm. It is suitable for brazing and small size (typically such as round rods below 35mm)hot forging, hardening operation with a layer depth of about 2~4mm.

3. High frequency induction heating machine

The working frequency of high frequency heating machine is mainly concentrated between 60KHz~200KHz, and the current penetration depth is less than 2mm. It is suitable for brazing, hot forging of small size (typically round bars below 15mm), and quenching operations with a layer depth of about 1~2mm.

In fact, there is no standard answer to which frequency band is used in the selection of equipment. It mainly needs to be based on comprehensive considerations such as the customer's purchase cost, workpiece material, and process requirements. For example, low-power high frequency induction heating machine module and higher-power ultra-audio equipment may have the same heating effect for certain workpieces.