Abstract: A permanent magnet multipole alternator includes an external rotor mechanically connectable to a source of variable velocity and having permanent magnets, an internal stator having windings housed in slots defined by equidistant teeth terminating in projecting extension pieces, a circuit converting the alternating current generated by the alternator into substantially direct current, and a circuit controlling the rotational speed of the energy source based on load. The conversion circuit has a bridge rectifier circuit, the permanent magnets of the rotor are of approximately trapezoidal shape, the distance between the magnets and the extension pieces of the stator teeth is between 0.8 and 1.8 mm, the ratio between the lengths of the major and minor bases of each magnet is between 1.2 and 6, and the ratio between the length of each extension piece of the stator teeth and the distance between the magnets, is between 0.5 and 2.

Abstract: An inductive discharge ingnition system for internal combustion engines, comprising a permanent magnet rotating syncronously with the engine and passing in front of an ignition coil and a control coil during its movement. The control coil controls a controlled discharge electronic circuit connected in series with the primary winding of the ignition coil, the secondary winding of which is connected to the electrodes of a spark plug. The assembly formed from the ignition coil and the control coil is configured in such a manner as to trigger the spark with an advance compatible with that required by the engine on starting.