Home made electric motor lifts 20 x 20c pieces

This is a Electrical Engineering Assignment from Charles Darwin University Australia.

The criteria was:

The motor can be powered by a maximum of 6 volts.

You may not use rotors or stators from pre-existing motors.

You may not use commercially available motor construction kits.

The motor must be able to lift at least 1 Australian 5 c coin at least 50cm.

I managed to lift 20x 5c coins with relative ease.

=20 x 2.83g = 56.6grams

My primary aim was to produce a motor with a lot of torque; my thinking was that the more torque the more 5c pieces that could be lifted.

Basically how it works:

The motor is powered by two 6 volt lantern batteries. The positive terminal of one of the batteries is connected to the centre brush. The centre brush is connected to the commutator; the commutator sends current to four plates, two on the left and two on the right which control the electromagnets. The electromagnets attract and repel the permanent magnets 4 times per revolution giving the motor a fair amount of torque

Now I've bumped to voltage up to 12 volts and added a flywheel now it can lift 20 x 20c pieces (I think the flywheel was more a hinderance than a help)

=20 x 11.30g = 226 grams

Earlier video can be viewed at: https://www.youtube.com/watch?v=vlZ56_BEu7g

lambroast@yahoo.com