Induction cookers are firmly taking place in our kitchens, replacing conventional electric ones. And all thanks to their rapid heating, low power consumption and almost instantaneous cooling of the working surface. Have you ever wondered how such a stove works. In our article, we will tell you how to make an induction heater yourself. Of course, you can’t boil potatoes on it, but it’s quite possible to boil a glass of tea.
Content:
Read also: Do-it-yourself induction heating: simple, warm and economical
Materials for manufacturing
In order to make an induction heater, you will need:
- copper wire with a cross section of 1.5 mm;
- two field-effect transistors and cooling radiators for them;
- capacitor (or several), total battery capacity - 2.5 microfarads;
- two resistors for 10 kOhm and 470 Ohm;
- power supply (battery) 12 V;
- insulated wires;
- soldering iron;
- two rods with diameters of 70 and 25 mm;
- wooden block;
- thermal grease;
- pliers.
We will assemble the induction heater according to the following scheme for surface mounting.
Scheme
Step 1. Making an inductor and an inductor
We wind three turns of copper wire onto a rod with a diameter of 70 mm, leaving the edges straight, for subsequent connections. In total, you need to make two such blanks.
Tin the edges with a soldering iron.
On a rod with a diameter of 25 mm we wind a coil of 10 turns.
We solder together two outputs of large coils.
Step 2. Assemble the induction heater
We connect field-effect transistors to radiators, having previously processed the junction with thermal grease.
We collect a battery of capacitors on copper wires. The total battery capacity should be 2.5uF.
We bend the ends of the wire on one of the edges of the battery, and solder field-effect transistors to them with middle legs (drain-drain).
The right legs of the transistors (source-source) are bent up and soldered together with a piece of copper wire.
We solder the resistors by connecting the left leg (gate-gate) of one transistor to the drain of the second with 10 kOhm resistors, and the gates and sources of each transistor with 470 Ohm resistors.
Solder the inductor from the second end of the capacitor bank.
Solder the inductor to the middle terminal of the inductor.
We connect the power wires: one - to the wire connecting the sources of the transistors, the second - to the second end of the inductor.
We attach the induction heater to a wooden block with self-tapping screws. For the convenience of connecting the power supply, we install a terminal block.
Step 3. Testing
Considering the polarity, we connect the battery to the heater.
We place any metal object in the center of the inductor.
The metal glowed red hot. The inductor itself remained almost cold.
With an induction heater, you can boil water in a plastic cup by putting a metal washer there.
We make an induction heater with our own hands
Induction heater? with your own hands | Working scheme
