Introduction: Electrostatic Motor

3D printed electrostatic motor

Goal: No ball bearings, easy mounting, new different design with low power requirements


1x 3mm screw about 10mm long e.g. unused screw from old PC hardware

1x 50 mm wire ~0.5-1mm e.g. paperclip

1x aluminium foil or copper foil e.g. self-adhesive aluminum tape for sealing or plain foil to glue

1x HV power source e.g. Wimshurst, Van-de-Graaff, Flyback Transformers

3D printed parts:

558.384 base.stl
58.984 electrode.stl - you need at least two printed
287.884 rotor.stl
258.384 screw_top.stl - to fix the wire for the rotor

All files netfabb checked

Step 1: Assembly

Print the parts on your 3D printer - i used 100% infill and only standard settings, no support required

Electrode.stl has to be printed twice. But you can use up to four electrodes with this design

First add the copper or aluminium foil to the rotor and the electrodes as shown in the picture

The electrodes have a sharp edge at one side which will only fit in one direction to the base - towards the rotor blades. The rotor blades need also be covered with foil because it will receive the charge from the electrodes.

When you have glued or used self-adhesive foil for the eight motor blades and at least two electrodes you

can add a piece of wire ~ 50 mm long e.g. the bigger paper clips. The wire has to be strong enough to hold the rotor in place and goes into the middle hole of the base. It will not fall through - just put it in and then take the screw_top.stl (alias the nut) printed part and screw (press fit by closing the screw) it together with the base to fix the wire.

Put the rotor on the wire so the small cylinder of the rotor is on the top side and the wire goes through

Cut the wire just above it is visible from the rotor and then add the 3mm screw to adust the height about the base.

Finally clip the electrodes into the slot you want e.g. 180° opposite from picture or 90° works too.

Attach your HV power source to the electrodes.

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