Grandson Nicholas and I developed this simple motor for his school project. We checked the web for ideas and then evolved this motor that has a number of unique features that make the motor easy to start and run. The motor also features a forward-reverse and speed control.
The motor armature rotates due to magnetic pulses created by a pulsating current that flows through the armature coil - these electromagnetic pulses interact with the rare earth neodymium permanent magnets (the "field" of the motor) and cause rotation to take place. The neodymium magnets are mounted on the sliding "direction and speed control" bar. Sliding the magnets under the armature gets the rotation started.