This is the simplest induction hob design you can imagine. No controllers or microcircuits. The circuit contains only 2 transistors and a few other elements. The circuit is mounted mounted without a board. Excellent for repetition by beginners in radio electronics.
Details
- Two field effect transistors 50N06 -
- Two resistors 220 Ohm 1 W -
- Two UF4007 diodes -
- 4 capacitors 0.33 µF 1000 V -
- Two chokes (inductance) 40-100 mH -
- Wire 1.1-1.5 mm.
How to make an induction cooker
We take two pieces of wire and remove the enamel.
Use it to solder 4 capacitors in parallel.
Let's take the transistors and solder them as drains to a line of capacitors on both sides, see photo.
Solder two chokes to a line of capacitors.
Let's connect the sources of the transistors with a jumper made of thick wire. We will also connect the outputs of the chokes.
Solder the resistor from the chokes to the gate of the transistor.
Next, solder the diode from the gate to the opposite connection of the capacitors.
On another transistor we will do the same: we will solder a resistor to the gate and to the chokes, a diode from the gate to the opposite connection of the capacitors.
Let's connect two radiators to the transistors.
We solder a common wire to the source of one of the transistors. This will be the negative terminal to the power supply. Positive from the connection of the chokes.
It's time to make an induction surface. Take a wire and a rectangle of cardboard 150x200. Let's pierce it and pass the wire through.
Then we will make a curl of about 10 turns.
Secure with glue.
Let's strip the ends of the coil and connect them to the terminals of the capacitors.
Let's connect to a 12 V 6 A current source.
To check the operation of the stove, we will build a coil of wire of a smaller diameter, with a number of turns of 20 pieces. And load it onto a car incandescent lamp.
If you bring this twist to the inductor, the lamp should glow.
We will definitely place a metal plate on the inductor. Pour water and put a thermometer in it.
After some time, the water began to boil.
The transistors also began to heat up; additional airflow from the computer cooler was needed to cool them.
The stove is ready and checked. Now you can try to cook something. Let's put a piece of butter.
And let's try to cook scrambled eggs.
Everything is working. The generation is approximately 60 kHz.
