What is the difference between a magneto and stator?

Answer 1

A stator and a magneto quite similar except a stator system requires the presents of power inorder to generate power and as for the magneto generates its own energy, a stator inside state magneto outside state.

Answer 2

A magneto uses permanent magnets for the field which may be a spinning rotor or a fixed field. As long as the magnetic field cuts through a coil or coils of wire is what matters. A motorcycle magneto is just that, a stator with a number of coils wired to get the volts and current needed and a rotor lined with magnets to supply the field. altho bikers call it the stator that charges the battery and works the lites ignition etc. it is STILL a magneto. It does require a rectifier to charge the battery and is usually a combo rectifier/regulator.

A car alternator has a stator or frame of coils the does not move, hence the name stator for stationary. It has a multi-pole rotor that is not made of magnets but is an electro-magnet meaning current must flow through a coil to get the rotor excited or having a magnetic field. This is done by sliprings on the rotor wired to the coil and current enters through brushes. when the battery is 'up' less current goes thru the rotor and voltage out is a bit less so as not to sazzle the lights.

The alternator has a built in diode bridge to turn a.c. to d.c. to charge the battery work the lites and ignition system as well as other accessories.

Both motorcycle mag /stator and car alternator require a voltage

regulator so the battery gets a proper charge. The regulator and rectifier are mostly one unit on the bike.