DOUBLE ROTOR STEPPING MOTOR

The invention lies in the field of precision mechanical actuators. It relates to a high precision stepping motor and can notably be used in the actuating mechanisms of artificial satellites. The stepping motor (10) according to the invention comprises two rotors (12, 13) that rotate in opposite directions so as to generate a low-amplitude movement between one of the rotors (13) and a stator (11). More specifically, the first rotor (12) comprises a first set of teeth (121) distributed at a first pitch pi and a second set of teeth (122) distributed at a second pitch p2. The stator (11) comprises N stator contacts (111-114) comprising a plurality a of teeth distributed at the pitch pi, distributed at a third pitch equal to p1(a+1/N), and able to cooperate with the teeth (121) of the first set. The second rotor (13, 33) comprises N rotor contacts (131-134) comprising a plurality b of teeth distributed at the pitch p2, distributed at a fourth pitch equal to p1(b+1/N), and able to cooperate with the teeth (122) of the second set of the first rotor.