Induction heater: self-heating circuit, how to make a vortex from a welding inverter

independently make the induction heater can, if properly approach this process Induction - a modern method of heat treatment of electrically conductive substances and materials, which has the highest efficiency among the existing methods. For more economical operation of heating and household appliances, today, use special induction heaters. How induction devices work and how to make an induction heater yourself - read below.

What induction heating:Advantages

induction heating principle is based on the effects of AC on the transformer winding and the subsequent occurrence of the electromagnetic field. As a result of the occurrence of a magnetic field, an electric current is formed between the magnetic and non-magnetic parts. It is high-frequency currents( HF) and there is heating of various electrically conductive materials.

induction heater advantage that it lightweight

Induction heating has many advantages:

• induction heating device has a small weight, so it can easily be used for domestic purposes;
• Induction heating is ideal for all types of heat treatment of metals, among which welding, soldering and forging are very popular;
• High-frequency heating can be carried out in vacuum, protective gas;
• With the help of induction, it is possible to quickly and evenly heat electrically conductive substances, to obtain ultrapure metals.

Furthermore, such a heating method is sverhekonomichny: it is converted to 90% of consumed energy into heat( when that conventional electric heaters have, on average, 45-50% indicators).

Vortex induction heater

Thanks to the economic benefits, today, induction heating has a wide application. The vortex induction heating apparatus is excellent for rooms of up to 60 square meters. M, which must be heated by electricity. So, VIN can be used for heating private houses, industrial and storage facilities, gas stations, car service and other free-standing objects.

The vortex induction heater

is quite popular. The main advantages of using the VIN as the "heart" of the heating system include:

• Heating occurs almost instantaneously, because the heat occurs directly in the part;
• Over the years, the installation works with the same power, its performance is not reduced;
• Compared to conventional electric heating elements, the induction vortex saves up to 50% of the electricity.

That's why today, more and more, companies producing household appliances and manufacturing machines use induction heating. An example of such use, in addition to heating boilers, is an induction electric furnace. In the food industry, an ultrasonic induction heater is used. For heating of metals used in industry inverter induction apparatus for melting nonferrous metals - smelting reduction unit, forging of iron and manufacturing preforms - induction electric horn.

Diagram of induction heater based on PCB

You can make a WINE with your own hands. In order to properly assemble the vortex induction heating apparatus, it is necessary to find the device circuit. The simplest is the circuit board layout, which is a breaker operating on high-power transistors.

Typical differences of this scheme are:

• Heating inductor( coil) in the form of a spiral with 6-8 turns;
• Presence of a voltage regulator( can be taken from an old computer unit);
• The presence of a resistance protecting transistors from overheating.

Before manufacturing an induction heater for a printed circuit board, you first need to familiarize yourself with its

circuit. It is recommended to install transistors in a heater assembled in this way using special radiators: this will avoid overheating the device. The same circuit can be used to assemble an inductor water heater.

The vortex induction heater device includes:

• Coil;
• Heat Exchanger;
• Terminal box;
• Control cabinet;
• Inlet and outlet nozzles.

The basis of this scheme is the resonance principle of operation, occurring in a series oscillatory circuit. The magnetic flux between coils of the coil is closed in the air.

To assemble a heater for water heating, the simplest way is to use a circuit with a transformer consisting of primary and secondary short-circuited windings. The water will be heated, passing through the tubes inside the coil and fed heated from the outlet branch pipe.

In this case, it should be remembered that in water heating systems with LEDs it is necessary to use a pump for forced circulation of water.

If there is no possibility to install a flow pump, it is possible to select a mechanical heater for the heat transfer fluid as a heating element or to attach a permanent magnet heater to the wall of the heat carrier tank.

Simplest induction heater by one's own hands

The most budgetary induction generator can be made by taking a transformer core. A sufficiently powerful device for induction heating can be assembled from an electronic transformer, which is a switching power supply.

In order to assemble a simple induction heater, it is necessary to prepare tools for the operation of the

. In order to assemble the device it is necessary: ​​

1. Solder the main transformer from the electric;
2. Make an inductor based on a ferrite cup;
3. Seal the ends of the wires in place of the switching power supply.

This heater will have an efficiency of at least 65%.This will be enough to assemble a small induction electric furnace. In addition, with the help of such a device it will be possible to quickly melt wires with a diameter of up to 4 mm.

How to make an induction heater by one's own hands: Instruction

An induction heating device can be made from an inverter current source of a welding machine. In this case, the design can be simplified by placing a straight pipe inside the induction coil. It will work as a core. In order to make the heater you need: a polymer pipe with a diameter of 5 cm;Steel wire with a diameter of 0.6 cm;Copper wire at 3mm;Building metal fine mesh.

Before manufacturing the induction heater, you can also read the detailed instruction

. Getting Started:

• Cut the wire rod into 3-6 mm lengths;
• Close one end of the pipe with a building mesh;
• We fall asleep inside the pipe pieces of wire;
• Close the second end of the pipe with a mesh;
• Over the pipe we perform winding( the turns must be at least 85 and not more than 95);
• We isolate the ends of the winding and connect them to the output of one of the types of power source of the welding arc.

The device is ready!Now, during the operation of the apparatus, the coil will create an electromagnetic field and fluxes of the eddy current. This will cause the device to heat up quickly.

Induction heater from welding inverter:

features

In conventional form, induction heaters made from a welding inverter represent an increased danger, because they can not autonomously control the temperature of the water. Thus, the use of a heater in systems with a heat transfer medium can be fraught with short circuits and rupture of pipes. This can occur because of the high hydraulic resistance in the system, which arises from the movement of the coolant through pieces of wire rod. Therefore, such devices require modifications.

Practical and qualitative is the induction heater from the welding inverter

To avoid emergencies, it is necessary to supply a homemade induction heater made of a welding inverter with emergency shutdown devices.

To control the heating, you can use a temperature controller with a temperature sensor and a relay that opens the circuit when the temperature of the heating medium reaches the set values. In addition, the system can be avoided by attaching a safety valve to the heater through a tee on the one hand.

Experienced electricians say that the conversion of one of the types of power sources of the welding arc into the heater is not justified: the thermal power of the heater will limit the electric power of the inverter.

This generator of heat is enough to heat the room, the area of ​​which is no more than 30 square meters. M. The savings in this case will be 30-50%( depending on the size of the apartments).At the same time, you will lose the expensive welding machine today.

What is an induction heater( video)

Inductive heating is a modern method of heat treatment of electrically conductive substances, which has found wide domestic use. Thus, vortex induction heaters are excellent for organizing more efficient and efficient operation of the heating system. Make an induction generator, at the same time, you can do it yourself. The main thing - take into account the recommendations of professional electricians and perform all the work consistently!