Materials & Preparation

Materials

Lego parts

and/or any parts you feel are right for the job.
For me, building with Lego is a way of expressing my imagination...
I rarely stop to plan a design, it just flows (30+ years of playing :)

Other parts

Special Tools

Safety First

NdFeB magnets are powerful. They should be kept away from electronic equipment and people with pacemakers. Large magnets can cause physical injury.

NdFeB magents are brittle, they can splinter if allowed to slam together. The splinters can be repelled at high velocity causing personal injury. NdFeB magnets should be treated with respect and handled with care.

Your health, safety and electronic euipment is your responsibility, the methods I describe below can be hazardous, and should only be attempted by a responsible adult.
I accept no resposibility should you try this at home.

Preparation

Stator

The stator has three coils, each one, 700 turns of 32 SGW enamelled wire.

To make the coils, I used glue 2 small sheets of acrylic together, and first cut the stator holder.

And from the cutout for the coils, i made the coil former center. The rest of the coil former is a couple of circles of acrylic a bit bigger than the coil.
The coils were wound the coils in my Lego Znap coil winder

The coils are then set in the holder, connected in series, and the stator is complete..

Rotors

The alt has two rotors, each one the same.
The rotor plate is made from 2 50mm washers guled together.
The six magnets are palced on the rotor plate, alternateing between north side and south side up. The magnets are set in place with super glue.

Each rotor has a Lego Technic pulley wheel glued to either side (which have to be carefully lined up.) Then the rotor assembly is made up and balanced using a model airplane prop balancer.

 

Preparation complete, time for construction.

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