Mechanical converter from a microwave oven motor

The converter we are talking about does not contain a single radio element. Built entirely on two electric motors, one of which was taken from a microwave oven. The conversion principle is very simple: a low-voltage motor is supplied with direct current. This motor rotates a high-voltage motor (acting as a generator), as a result it produces an alternating voltage of up to 500 V at the output.

Will need

• Plexiglas stand.
  
• Clamp terminals.
  
• Wires.
  
• Motor 12-24 V.
  
• Microwave motor (used to rotate the dish).

As you can see, the microwave motor is designed for a voltage of 250 V, its power is 4 W. These are, of course, consumed values. If we use it as a generator, the readings will be slightly different; more precisely, they will depend on the frequency of its rotation.

Manufacturing of high voltage converter

The microwave motor also contains a gearbox that needs to be removed. We bend the bent clamps and remove the gearbox along with the rotor on permanent magnets.

This rotor must be placed on the shaft of the drive motor.

We fix everything on a plexiglass stand so that the axes of the motors are in the same plane without distortion. We connect the wires, connect the terminals for a convenient connection.

Tests

We supply the low-voltage motor with a constant voltage of 24 V (the maximum for it). As you can see, at idle the generator produces more than 300 V. It reaches 500 if you slightly increase the speed by raising the voltage.

Now we look under the load, which is a 220 V LED lamp with a power of 5 W.

As you can see, the voltage dropped significantly, almost 3 times.

The driving motor consumes 0.2 A at 24 V, resulting in a power consumption of 4.8 W. But there is no such power at the output; it is significantly lower. This suggests that the converter itself has low efficiency.

Application

In principle, it is always there. For example, if you take a 12 V motor and use a cell phone charger as a load, you can easily charge your cell phone from a battery.

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