Polyphase electromagetic transducer with a permanent magnet, in particular a drive motor

A polyphase electromagnetic transducer, in particular a drive motor comprising:

• a stator including first and second principal parts, the first principal part defining a stator hole and including at least three magnetic poles, each of such magnetic poles comprising a polar expansion at one end thereof partially defining said stator hole and a polar lug substantially at another end thereof, said lug serving as a magnetic contact, said polar expansions being separate from one another by zones of high magnetic reluctance, said second principal stator part serving to form part of the magnetic circuits of said motor, said stator further including at least three magnetic flux guidance branches, each of such branches magnetically coupling a polar lug of said first principal stator part to said second principal stator part;
• a rotor rotatably mounted in said stator hole and including at least one permanent magnet, such rotor being adapted to spin in order to furnish a driving couple to a mechanism to be driven;
• at least two coils each mounted on one of said magnetic flux guidance branches, each coil being intended for coupling to an electrical supply source so as to generate a magnetic flux in its associated branch;
• wherein said first and second principal stator parts of such transducer are situated primarily in two different planes and are at least partially superimposed, each of said magnetic flux guidance branches bearing one of said coils being situated primarily in a region intermediate said principal stator part planes.