Homemade induction heater. Induction heating, basic principles and technologies

Appliances that heat with electricity rather than gas are safe and convenient. Such heaters do not produce soot and bad smell but consume a large number of electricity. An excellent way out is to assemble an induction heater with your own hands. This saves money and contributes to the family budget. There are many simple schemes according to which the inductor can be assembled independently.

In order to make it easier to understand the circuits and assemble the structure correctly, it would be useful to look into the history of electricity. Heating methods metal structures electromagnetic current coils are widely used in industrial manufacturing household appliances- boilers, heaters and stoves. It turns out that you can make a working and durable induction heater with your own hands.

The principle of operation of devices

The principle of operation of devices

The famous 19th century British scientist Faraday spent 9 years researching to convert magnetic waves into electricity. In 1931, a discovery was finally made, called electromagnetic induction. The wire winding of the coil, in the center of which there is a magnetic metal core, creates a magnetic field under the force alternating current. Under the action of vortex flows, the core heats up.

An important nuance is that heating will occur if the alternating current supplying the coil changes the vector and sign of the field at high frequencies.

Faraday's discovery began to be used both in industry and in the manufacture of home-made motors and electric heaters. The first foundry based on a vortex inductor was opened in 1928 in Sheffield. Later, according to the same principle, the workshops of factories were heated, and for heating water, metal surfaces connoisseurs assembled the inductor with their own hands.

The scheme of the device of that time is valid today. Classic example- induction boiler, which includes:

• metal core;
• frame;
• thermal insulation.

Less weight, size and more high efficiency are carried out due to thin steel pipes that serve as the basis of the core. AT kitchen tiles the inductor is a flattened coil located near the hob.

The features of the circuit for accelerating the frequency of the current are as follows:

• industrial frequency of 50 Hz is not suitable for home-made devices;
• direct connection of the inductor to the network will lead to hum and low heating;
• effective heating is carried out at a frequency of 10 kHz.

Assembly according to schemes

Anyone familiar with the laws of physics can assemble an inductive heater with their own hands. The complexity of the device will vary from the degree of preparedness and experience of the master.

There are many video tutorials that you can follow to create efficient device. It is almost always necessary to use the following basic components:

• steel wire with a diameter of 6-7 mm;
• copper wire for the inductor;
• metal mesh (to hold the wire inside the case);
• adapters;
• pipes for the body (made of plastic or steel);
• high frequency inverter.

This will be enough to assemble an induction coil with your own hands, and it is she who is at the heart of instantaneous water heater. After preparation necessary elements you can go directly to the manufacturing process of the device:

• cut the wire into segments of 6-7 cm;
• cover with metal mesh inner part pipes and fill the wire to the top;
• similarly close the pipe opening from the outside;
• wrap around plastic case copper wire at least 90 times for a coil;
• insert the structure into the heating system;
• using an inverter, connect the coil to electricity.

It is advisable to first ground the inverter and prepare antifreeze or water.

According to a similar algorithm, you can easily assemble an induction boiler, for which you should:

• cut pieces from steel pipe 25 by 45 mm with a wall no thicker than 2 mm;
• weld them together, connecting them with smaller diameters;
• weld iron covers to the ends and drill holes for threaded pipes;
• make a mount for an induction stove by welding two corners on one side;
• insert hob into the mount from the corners and connect to the mains;
• add coolant to the system and turn on the heating.

Many inductors operate at a power not higher than 2 - 2.5 kW. Such heaters are designed for a room of 20 - 25 m². If the generator is used in a car service, you can connect it to a welding machine, but It is important to consider certain nuances:

• You need AC, not DC like an inverter. The welding machine will have to be examined for the presence of points where the voltage does not have a direct direction.
• The number of turns to a wire of a larger cross section is selected by a mathematical calculation.
• Cooling of working elements will be required.

Creating sophisticated fixtures

It is more difficult to make an HDTV heating installation with your own hands, but it is subject to radio amateurs, because to collect it you will need a multivibrator circuit. The principle of operation is similar - eddy currents arising from the interaction of the metal filler in the center of the coil and its own high magnetic field, heat up the surface.

Design of HDTV installations

Since even small coils produce a current of about 100 A, a resonating capacitance will need to be connected with them to balance the induction thrust. There are 2 types of working circuits for heating HDTV at 12 V:

• connected to mains power.

• targeted electrical;
• connected to mains power.

In the first case, a mini HDTV installation can be assembled in an hour. Even in the absence of a 220 V network, you can use such a generator anywhere, but if you have car batteries as power sources. Of course, it is not powerful enough to melt metal, but it is able to heat up to the high temperatures required for fine work, for example, heating knives and screwdrivers to of blue color. To create it, you need to purchase:

• field effect transistors BUZ11, IRFP460, IRFP240;
• car battery from 70 A / h;
• high voltage capacitors.

The current of the 11 A power supply is reduced to 6 A during the heating process due to the resistance of the metal, but the need for thick wires that can withstand a current of 11-12 A remains to avoid overheating.

The second scheme for induction plant heating in plastic case more complex, based on the IR2153 driver, but it is more convenient to build a 100k resonance on the regulator. It is necessary to control the circuit through a network adapter with a voltage of 12 V or more. The power unit can be connected directly to the main network of 220 V using a diode bridge. The resonance frequency is 30 kHz. The following items will be required:

• ferrite core 10 mm and choke 20 turns;
• copper tube as an HDTV coil of 25 turns per mandrel 5–8 cm;
• capacitors 250 V.

Vortex heaters

A more powerful installation capable of heating bolts up to yellow color, can be assembled according to a simple scheme. But during operation, the heat generation will be quite large, so it is recommended to install radiators on transistors. You will also need a choke, which you can borrow from the power supply of any computer, and the following auxiliary materials:

• steel ferromagnetic wire;
• copper wire 1.5 mm;
• field-effect transistors and diodes for reverse voltage from 500 V;
• zener diodes with a power of 2-3 W with a calculation of 15 V;
• simple resistors.

Depending on the desired result, winding wire on a copper base is from 10 to 30 turns. Next comes the assembly of the circuit and the preparation of the base coil of the heater from about 7 turns of 1.5 mm copper wire. It connects to the circuit and then to electricity.

Craftsmen familiar with welding and operating a three-phase transformer can further increase the efficiency of the device while reducing weight and size. To do this, it is necessary to weld the bases of two pipes, which will serve as both a core and a heater, and after winding, weld two pipes into the body to supply and remove the coolant.

Focusing on the schemes, you can quickly assemble inductors of various capacities for heating water, metals, heating a house, a garage and a car service. It is also necessary to remember the safety rules for the effective service of heaters of this type, because the leakage of coolant from homemade device may end in fire.

There are certain conditions for organizing work:

• the distance between the induction boiler, walls, electrical appliances should be at least 40 cm, and it is better to retreat 1 m from the floor and ceiling;
• with the help of a pressure gauge and an air release device, a security system is provided behind the outlet pipe;
• to use devices preferably in closed circuits with forced circulation of the coolant;
• application in plastic pipelines is possible.

Self-assembly of induction generators will be inexpensive, but not free, because you need enough components good quality. If a person does not have special knowledge and experience in radio engineering and welding, then you should not independently assemble a heater for large area, because the heating power will not exceed 2.5 kW.

However self assembly the inductor can be seen as self-education and advanced training of the owner of the house in practice. You can start with small appliances simple circuits, and since the principle of operation in more complex devices is the same, only added additional elements and frequency converters, then it will be easy and quite budgetary to master it in stages.

In contact with

Recently, there was a need to create a small do-it-yourself induction heater. Wandering around the Internet, I found several schemes for induction heaters. Many schemes did not suit because of the rather complicated strapping, some did not work, but there were also working options.

A few days ago I came to the conclusion that an induction heater can be made from an electronic transformer at minimal cost.

The principle of induction heating is to act on the metal with Foucault currents. Such a heater is actively used in various fields of science and technology. In theory, Foucault currents are indifferent to the types and properties of metals, so the inductor can heat up or melt absolutely any metal.

An electronic transformer is a switching power supply on the basis of which our heater is built. This is a simple half-bridge inverter built around two powerful MJE13007 series bipolar transistors that overheat terribly during operation, so they need a very good heat sink.

To start with the electronic transformer, you need to unsolder the main transformer. We will make a kind of inductor based on a ferrite cup. To do this, we take a cup of 2000 NM (the size of the cup is not particularly important, but a larger one is desirable). On the frame we wind 100 turns with a wire of 0.5 mm, remove from the ends of the wires lacquer coating and lure. Then we solder the ends of the wires to the place of the standard pulse transformer - everything is ready!

It turned out to be a fairly powerful home-made induction heater (efficiency no more than 65%), on the basis of which even a small induction stove can be assembled. If you take a piece of metal and bring this metal closer to the center of the coil, then after a few seconds the metal will heat up. Such a heater can melt wires with a diameter of 1.5 mm - I managed to do this in just 20 seconds, but at the same time, the high-voltage ET transistors got so hot that they could fry eggs on them!

During operation, there may be a need for additional cooling for heat sinks, since experience has shown that the heat sink simply does not have time to remove heat from the transistors.

The basis of the operation of such an inverter is quite simple. The induction heater circuit itself is convenient in that it does not require any configuration.(in more complex schemes often there is a need to adjust the circuit to the resonance frequency, an accurate calculation of the number of turns and the diameter of the circuit wire, as well as counting the circuit capacitor, but here all this is not there and the circuit works immediately).

The mains voltage (220 Volts) is first rectified by a diode rectifier, then fed to the circuit. The frequency is set by the dinistor (diac) of the DB3 brand. The circuit itself has no protections, only a limiting resistor at the power input, which supposedly should work as a mains fuse, but at the slightest problem, transistors fly out first. The reliability of the induction heater circuit can be improved by replacing the diodes in the rectifier with more powerful ones by adding network filter to the input of the circuit and replacing the power transistors with more powerful ones, say MJE13009.

In general, I do not advise turning on such a heater for a long time if there is no active cooling, otherwise you will be forced to change transistors every 5 minutes.

The modern and most economical device for heating water is an induction water heater. Unlike analogues, it is completely environmentally friendly, does not dry or burn out the air, and meets modern safety requirements. It can be used both as an instantaneous water heater and as a boiler for space heating. The device is usually bought in a store, we offer an alternative - independent production. In the latter case, the device may not have such an attractive appearance but will be much cheaper.

Pros and cons of induction devices for heating water

The device has quite simple design and does not require special documents authorizing the use and installation. induction heating The water dispenser has a high degree of efficiency and optimum reliability for the user. When using it as a boiler for heating, you don’t even need to install a pump, since water flows through the pipes due to convection (when heated, the liquid practically turns into steam).

Also, the device has a number of advantages, which distinguishes it from other types of water heaters. So, induction heater:

In induction heaters, water becomes hot due to the pipe through which it flows, and the latter is heated due to the induction current created by the coil.

• much cheaper than their counterparts, such a device can be easily assembled independently;
• completely silent (although the coil vibrates during operation, this vibration is not noticeable to a person);
• vibrates during operation, due to which dirt and scale do not stick to its walls, and therefore does not need to be cleaned;
• has a heat generator that can be easily sealed due to the principle of operation: the coolant is inside the heating element and the energy is transferred to the heater through an electromagnetic field, no contacts are needed; therefore not needed sealing gum, seals and other elements that can quickly deteriorate or leak;
• there is simply nothing to break in the heat generator, since the water is heated by an ordinary pipe, which is unable to deteriorate or burn out, unlike a heating element;

Do not forget that the maintenance of an induction heater will be much cheaper than a boiler or gas boiler. The device has a minimum of parts that almost never fail.

Despite the huge number of advantages, the induction water heater has a number of disadvantages:

• the first and most painful for the owners is the electricity bill; the device cannot be called economical, so you have to pay a decent amount of time for its use;
• secondly, the device gets very hot and heats up not only itself, but also the surrounding space, so it is better not to touch the body of the heat generator during its operation;
• third - the device has an extremely high efficiency and heat transfer, therefore, when using it be sure to install a temperature sensor, otherwise the system may explode.

Do-it-yourself induction water heater: diagram

The device is a transformer having two windings: primary and secondary. The first circuit converts electrical energy into eddy currents, thereby creating a directional induction field, which provides induction heating. On the secondary circuit, the converted energy is transferred to the coolant (in our case, it is water).

It is important to consider the type of material from which the winding is made. So, in household models, copper wire is most often used. Such material is well suited for heating water in boilers.

In addition to the transformer, the device has a generator and a pump (optional).

Scheme of a simple induction water heater. As you can see, the device has a fairly simple design and a small number of elements.

Units and parts of the heat generator

The device includes:

• an alternator that increases the frequency of the current;
• an inductor that transforms electricity into magnetic energy is a coil of copper wire;
• a heating element, most often its role is played by a metal pipe.

Thanks to this design, energy transfer is carried out almost without loss. The efficiency reaches 98%.

Principle of operation

The induction water heater consists of a generator, a coil and a core, the latter is heated by electromagnetic energy.

The device converts electrical energy into electromagnetic energy. The latter, in turn, acts on the core (pipe), which heats up and transfers to water thermal energy. All these energies are converted by an inductor consisting of a coil and a core. The generator is used to increase the frequency of the current, since it is difficult to achieve high heating with a standard frequency of 50 Hz.

In factory models, the current frequency reaches 1 kHz.

Do-it-yourself flowing induction water heater

Before proceeding with the installation, you need to stock up necessary details. So, the best option there will be a welding high-frequency inverter, smoothly changing current range. Such a device will cost the least. More an expensive option becomes a three-phase transformer, which is the AC power source for the water heater inductor. In this case, it is worth using a coil of 50-90 turns, and as a material, take copper wire with a diameter of 3 or more millimeters.

As a core, you can use both a metal and a polymer pipe along with a wire (it is used as a heating element). In the latter case, the thickness of the walls should not be less than 3 mm in order to calmly withstand high temperatures.

To assemble the water heater, you will need: wire cutters, screwdrivers, a soldering iron and welding machine if a metal pipe is used.

Installation of an induction water heater

Wrap the pipe with copper wire, making about 90 turns.

There are many options for assembling the device. We suggest trying to assemble the device according to the following scheme:

1. Prepare workplace, materials and tools.
2. Fix a small piece of polymer pipe (do not forget that minimum thickness walls should be 3 mm).
3. Trim the ends of the core to leave 10 cm of spare wire for the taps.
4. Mount a corner on the lower outlet. In the future, the return from the heating should be connected here (if the heater is used as a boiler).
5. Lay the chopped wire tightly around the pipe. It is necessary to make at least 90 turns.
6. Install a tee on the top pipe through which hot water will exit.
7. Mount protective circuit devices. It can be made from both polymer and metal.
8. Connect copper wire to the water heater terminals, then fill the core with water.
9. Check the functionality of the inductor.

Recommendations. On all conclusions it is better to install Ball Valves for convenience and ease of dismantling the water heater in the event of a breakdown. But it is not necessary to fill the pipe with metal pieces, since this does not give the desired effect. Do not forget to leave a window in the housing for access to the control panel of the welding machine.

Induction water heaters for heating

Heating circuit, where an induction boiler serves as a coolant heater.

Such a device has proven itself not only as an instantaneous water heater, but also as a boiler for heating. True, in this case, the welding machine as a generator is no longer suitable, you have to use a transformer with two windings. The latter transforms the eddy currents that occur on the primary winding into an electromagnetic field that is created on the secondary circuit.

In the heating system, the coolant can be not only water, but also oil or antifreeze. That is, any liquid that can conduct electricity.

The boiler from the induction water heater must be equipped with two pipes for hot and cold water. From the bottom will come cold water, it must be mounted on the introductory section of the line, and on top it is necessary to place a branch pipe that will supply hot water into the heating system. As a result, the circulation of water is carried out naturally by convection without a pump.

What you need to know about security

Do not forget that we are dealing with a source of increased danger - an electric heater, so when assembling and using it, you must follow some rules:

Be sure to use a separate electrical line to connect the induction boiler, and also equip it with a safety group.

1. If water circulates naturally in the boiler, then be sure to equip it with a temperature sensor so that the device turns off automatically when overheated.
2. Do not connect homemade water heater into the socket, it is better to run a separate line for this with an increased cable cross-section.
3. All open areas wires must be insulated to protect people from electric shock or burns.
4. Never turn on the inductor if the pipe is not filled with water. Otherwise, the pipe will melt, and the device will close, or it may even catch fire.
5. The device must be mounted at a height of 80 cm from the floor, but so that about 30 cm remains to the ceiling. Also, you should not install it in a residential area, since the electromagnetic field has a bad effect on people's health.
6. Don't forget to ground the inductor.
7. Be sure to connect the device through the machine so that in the event of an accident, the latter will turn off the power from the water heater.
8. to be installed in the piping system safety valve, which will reduce the pressure in the system automatically.

Conclusion

The induction water heater has a high efficiency, can act as a boiler for the heating system, self-assembly and installation is also allowed, and its use is in no way regulated by the law of the Russian Federation. But still, before using it, it is worth weighing the pros and cons. Despite its high efficiency, the device consumes a large amount of energy, is considered unsafe (especially home-made) and has a bad effect on human health. Therefore, we recommend mounting the inductor in a private house or in the country.

induction heater- This is a high stage in the evolution of electrical appliances. Thanks to this device, you can significantly save energy consumption. The heat generator used in this device is completely harmless, does not emit soot during operation. For example, in terms of efficiency, a heating boiler (the diagram of an induction heater is shown below) is second only to infrared heater. However, unlike infrared devices, which are sold only in specialized stores, induction heaters can not only be bought, but also assembled by hand.

Such devices come in several levels of complexity and purpose, for example, for water and metal. Their devices, of course, are different, but the principle of operation is identical. The photo below shows a diagram of an induction metal heater; it is quite easy to assemble this device using it.

So, in this article we will consider the process of assembling an induction heater from improvised means that can be found in the "bins" of any home master.

How does a DIY induction heater work?

The principle of operation of a homemade heater is no different from a factory device. That is, the coolant circulates in the core, heating up from its walls or contents. It heats up due to the eddy currents generated by the winding.

Important: polymer cores are stuffed with chopped wire!

In turn, the winding is wound around the body of the core and closed to a current source. high frequency. It is this energy that is able to generate an alternating electromagnetic field - the root cause of the appearance of eddy currents in a stationary core (or its filler).

The scheme of the induction water heater, presented below, is often used in heating boilers.

The source of high-frequency alternating current can be a conventional or more a complex system based on a transformer and a frequency converter.

It should be noted that when right approach to the choice of the source and the formation of the winding, you can create really effective device, which will work no worse than the factory counterpart. By the way, in its kit there is always an instruction and a diagram of the induction heater.

We assemble an induction device with our own hands: important details

To assemble such a heater you will need:

It is this device that will be the source of the alternating electric current high frequency feeding the inductor.

After that, you need to take Wind it with a spring on the core body. This device will act as an inductor. It is very important to connect the wire contacts to the inverter terminals, avoiding soldering and twisting. Based on this, the piece of this material used to form the core must be of sufficient length. The number of turns is usually 50 and the wire diameter is usually 3 mm. The diagram of an induction heater shows the connection sequence of the individual components.

Making the core

The core is an ordinary polymer pipe made of cross-linked polyethylene or polypropylene. These grades of plastic withstand maximum high temperature. Throughput diameter the core pipe should be 50 mm, and the wall thickness cannot be less than 2.5-3 mm. Then this part can be used as a caliber on which copper wire is wound, forming an inductor.

An approximate diagram of an induction heater is shown in this picture.

The heating element of such a boiler will be a polymer core filler - chopped pieces with a diameter of 7 mm. Moreover, their length cannot be less than 5 cm.

Assembly of the device using the example of a heating induction boiler

The process of assembling all these components into a single system is as follows:

• First, take a piece of polymer pipe, fix it and wind 50 turns of 3 mm copper wire over the future core.
• Next, cut the ends of the core, leaving 7-10 cm from the edge of the wire to the taps.

Important: Do-it-yourself induction heater circuit is carried out in several stages, the sequence of which must not be violated in any case. To avoid mistakes, you must follow the instructions exactly.

Making an induction heater with my own hands, you need to worry about the security of the device. This requires guidance the following rules, increasing the level of reliability of the overall system:

1. A safety valve should be inserted into the upper tee to relieve excess pressure. Otherwise, upon failure circulation pump the core will simply burst under the influence of steam. As a rule, the scheme of a simple induction heater provides for such moments.
2. The inverter is connected to the network only through the RCD. This device works in critical situations and will help to avoid a short circuit.
3. The welding inverter must be grounded by leading the cable to a special metal outline, mounted in the ground behind the walls of the structure.
4. The body of the induction heater must be placed at a height of 80 cm above the floor. Moreover, the distance to the ceiling must be at least 70 cm, and to other pieces of furniture - more than 30 cm.
5. An induction heater generates a very strong electromagnetic field and should therefore be kept away from living quarters and pet enclosures.

Summarizing

A do-it-yourself induction heater will work no worse than a factory appliance. It is not inferior in performance, efficiency and safety, of course, if all the rules have been followed.

Before we talk about how to assemble a homemade induction heater, you need to find out what it is and how it works.

History of induction heaters

In the period from 1822 to 1831, the famous English scientist Faraday conducted a series of experiments, the purpose of which was to achieve the conversion of magnetism into electrical energy. He spent a lot of time in his laboratory. Until one day, in 1831, Michael Faraday finally got his way. The scientist finally managed to get an electric current in the primary winding from a wire that was wound on an iron core. This is how electromagnetic induction was discovered.

Power of induction

This discovery began to be used in industry, in transformers, various motors and generators.

However, this discovery really became popular and necessary only after 70 years. During the rise and development of the metallurgical industry, new, modern methods melting of metals in the conditions of metallurgical productions. By the way, the first foundry, which used a vortex induction heater, was launched in 1927. The plant was located in the small English town of Sheffield.

And in the tail and in the mane

In the 80s, the principle of induction began to be applied according to full program. Engineers were able to create heaters that worked on the same principle of induction as a metallurgical furnace for melting metals. Such devices heated the workshops of factories. A little later they began to release home appliances. And some craftsmen did not buy them, but assembled induction heaters with their own hands.

Operating principle

If you disassemble the induction type boiler, then there you will find a core, electrical and thermal insulation, then body. The difference between this heater and those used in industry is the toroidal winding copper conductors. It is located between two pipes welded together. These pipes are made of ferromagnetic steel. The wall of such a pipe is more than 10 mm. As a result of this design, the heater has a much lower weight, higher efficiency, and also small size. A pipe with a winding works here as a core. And the other serves directly to heat the coolant.

The induction current, which is generated by a high-frequency magnetic field from the external winding to the pipe, heats the coolant. This process causes the walls to vibrate. Due to this, scale is not deposited on them.

Heating occurs due to the fact that the core is heated during operation. Its temperature rises due to eddy currents. The latter are formed due to the magnetic field, which, in turn, is generated by high voltage currents. This is how an induction water heater and many modern boilers work.

DIY induction power

Heating appliances that use electricity as energy are as convenient and comfortable to use as possible. They are much safer than gas powered equipment. In addition, in this case there is neither soot nor soot.

One of the disadvantages of such a heater is the high consumption of electricity. In order to somehow save money, craftsmen learned how to assemble induction heaters with their own hands. The result is an excellent device that requires much less electrical energy to operate.

Manufacturing process

To make such a device yourself, you do not need to have serious knowledge in electrical engineering, and anyone can handle the assembly of the structure.

For this we need a piece of thick-walled plastic pipe. It will work as the body of our unit. Next, you need a steel wire with a diameter of not more than 7 mm. Also, if you need to connect the heater to the heating in the house or apartment, it is advisable to purchase adapters. You also need a metal mesh that should hold steel wire inside the hull. Naturally, copper wire is needed to create an inductor. Also, almost everyone in the garage has a high-frequency inverter. Well, in the private sector, such equipment can be found without difficulty. Surprisingly, from improvised means it is possible without special costs make induction heaters with your own hands.

First you need to carry out preparatory work for wire. We cut it into pieces 5-6 cm long. The bottom of the part of the pipe must be closed with a net, and pieces of cut wire should be poured inside. From above, the pipe must also be closed with a net. It is necessary to pour so much wire to fill the pipe from top to bottom.

When the part is ready, you need to install it in the heating system. Then you can connect the coil to electricity through the inverter. It is believed that an induction heater from an inverter is a very simple and most budgetary device.

Do not test the apparatus if there is no water or antifreeze supply. You just melt the pipe. Before starting this system, it is advisable to make a ground for the inverter.

Modern heater

This is the second option. It involves the use of modern products electronic appliances. Such an induction heater, the diagram of which is presented below, does not need to be adjusted.

This circuit implies the principle of series resonance and can develop decent power. If you use more powerful diodes and larger capacitors, you can increase the performance of the unit to a serious level.

Assembling the vortex induction heater

In order to assemble this device, you need a choke. It can be found if you open the power supply of a regular computer. Next, you need to wind a wire made of ferromagnetic steel, copper wire 1.5 mm. Depending on the required parameters, it may take from 10 to 30 turns. Then you need to pick up field effect transistors. They are selected based on the maximum open junction resistance. As for the diodes, they need to be taken under a reverse voltage of at least 500 V, while the current will be somewhere around 3-4 A. You will also need zener diodes rated for 15-18 V. And their power should be about 2-3 Tue Resistors - up to 0.5 W.

Next, you need to assemble the circuit and make a coil. This is the basis on which the entire VIN induction heater is based. The coil will consist of 6-7 turns of 1.5 mm copper wire. Then the part must be included in the circuit and connected to electricity.

The device is able to heat the bolts to yellow. The circuit is extremely simple, however, the system generates a lot of heat in operation, so it is better to install radiators on transistors.

More complex design

In order to assemble this unit, you need to be able to work with welding, and a three-phase transformer is also useful. The design is presented in the form of two pipes that must be welded into each other. At the same time, they will play the role of a core and a heater. The winding is wound on the body. In this way, you can significantly increase productivity and at the same time achieve small overall dimensions and low weight.

To perform the supply and removal of the coolant, it is necessary to weld two pipes into the device body.

recommended to avoid as much as possible possible losses heat, as well as protect yourself from possible current leaks, make insulation for the boiler. It will eliminate the occurrence of excessive noise, especially during intensive work.

It is desirable to use such systems in closed heating circuits in which there is a forced circulation of the coolant. It is allowed to use such units for plastic pipelines. The boiler must be installed in such a way that the distance between it and walls, other electrical appliances it was at least 30 cm. It is also desirable to keep a distance of 80 cm from the floor and ceiling. It is also recommended to mount a security system behind the outlet pipe. For this, a pressure gauge, an air release device, as well as a blast valve are suitable.

It's so easy and without high costs you can assemble induction heaters with your own hands. This equipment may well serve you long years and heat your home.

So, we found out how an induction heater is made with our own hands. The assembly scheme is not very complicated, so you can handle it in a matter of hours.