Processing unit comprising means for controlling an electromagnetic actuator and electromagnetic actuator comprising such a processing unit

A processing unit has control units (21) acting on an excitation coil (3) to displace a mobile armature (12) of an electromagnetic actuator (100) and generating a periodical voltage wave frame including at least n rectifying alternation. Each alternation includes at least one first impulsive excitation order starting at a zero voltage of the alternation, and at least one second impulsive excitation order terminating at a zero voltage of the alternation. Electrical energy of the orders of the first alternation is lower than or equal to an electrical energy of the orders of the second alternation posterior to the first alternation.