Make a Powerful 48V DC Motor From a Dead Blender/Drill Motor





Introduction: Make a Powerful 48V DC Motor From a Dead Blender/Drill Motor


In this instructable, you will learn how to transform a dead Blender/drill machine motor (Universal motor) into a very powerful permanent magnet DC motor with upto 10,000 RPM and a good value of torque.

Note:This method is applicable only if the field coils of a Universal motor get burnt and not the rotor coils.

You can also perform this even if the field coils a perfectly fine since they are detachable.

With this modification everything will be enhanced ie. higher starting torque, higher running torque, higher full load torque, higher RPM to voltage ratio, lower resistance, lower voltage, negligible current change.

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Step 1: Requirements:

List of Requirements:

  1. universal motor (blender/drill universal motor)
  2. Two Magnets (better if concave)
  3. screw driver
  4. glue gun
  5. 30 to 50 volts DC supply
  6. machine oil

We need magnets because we are going to replace the electromagnetic field of the Universal motor with permanent magnets to transform it into a pmdc motor.

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Step 2: Field Modification:

After securing all that is required for the project what you have to do is to completely open up the Universal motor as shown in the pictures.

The motor should have three major parts - the field, the Rotor and the brushes.

Remove the field part and place everything back as before.After doing that put some machine oil on the moving parts like on the commutator, the shaft etc.

Now take one of the concave magnets and place it there where the electromagnetic field was attached.Stick the magnet properly with the help a hot glue gun.

Take the other magnet and place it vertically opposite to the first magnet and remember that the concave side will always face the rotor.Do the same with the second magnet too.

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Step 3: Test:

Now take a 30 to 50 volts DC power source and connect it to the wires of this newly modified motor.Remember to hold the motor properly before you connect both the wires.

The Motor should start smoothly with a very high torque and should attain its highest speed of up to 10000 RPM within 3 seconds.

Initially the voltage rating of the motor was 250 volts AC or DC and now it is only 48 volts DC for the same value of speed and torque.

So guys that was all about this instructable.


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