Typical diagram of the magnetron power supply circuit

shapanqqcceqd · Post by **shapanqqcceqd** » Tue Feb 18, 2025 11:09 am

Microwave oven structure

Designations:

The door latches serve both to secure the door and to provide a system for blocking operation in the open position.
A rotating tray on which dielectric cookware is placed.
A separator equipped with rollers that drives the tray.
Drive that rotates the separator.
The backlight lamp turns on depending on the operating mode.
Ventilation (usually forced).
Magnetron is a microwave radiation generator, essentially, it is the main element of the design. How it is constructed and the principle of its operation you can find out by reading the article on our website dedicated to this issue.
Waveguide, provides movement of microwave waves to the netherlands telegram data microwave oven chamber. It is a hollow metal pipe of rectangular cross-section.
High voltage diode.
Capacitor.
Waveguide power supply circuit transformer and control circuit.
Control unit.
We will not provide a complete circuit diagram of the device, since they can differ greatly in different models of microwave ovens. In our case, the magnetron power supply circuit will be sufficient. As a rule, it has a typical structure.

Let us briefly describe the operating principle of the given circuit. Power is supplied to the primary winding of the transformer (I) from an external control circuit that regulates the power and duration of microwave radiation. One of the secondary windings (II) supplies voltage to the magnetron filament. Winding II is made of 2-4 turns of thick wire, since the current in the filament circuit can reach 10.0 A at a voltage of about 3 volts.

Another secondary winding (III), which provides a high voltage supply (up to 3.0 kV), is usually called the anode winding. As can be seen from the figure, in this circuit, a rectifier and voltage multiplier are built on the basis of a high-voltage diode (VD1) and a capacitor (C1). In this case, VD1 is connected so that it opens during the positive half-period, as a result of which the capacitor begins to charge.