Synchronous motor having a variable reluctance

Claim 1

In a synchronous motor having a variable reluctance and supplied with three-phase electric current, said motor comprising a stator having a polar face provided with radial teeth and a non-magnetic rotor which is coaxially disposed with respect to the stator and which is externally provided with radial teeth, the improvement wherein: (a) the stator is provided with 3n pairs of poles (P) where n is a positive integer, each of said poles (P) bearing at least one inductive winding (E) and the inductive windings of all the poles (P) being identical; (b) the inductive windings (E) are arranged in groups of six in which each of said inductive windings (E) is connected to a diode (D) to form a group (G) of diode (D) - inductive winding (E) elements; (c) each diode (D) is such that two diodes (D) connected respectively to two inductive windings (E) provided on two adjacent poles (P) permit the passage of oppositely directed electric currents; (d) three pairs (H) of groups (G) of elements are formed by disposing in parallel two groups (G1-G2, G3-G4, G5-G6) of elements which are selected in such a way that the inductive windings which are thus assembled are provided on poles (P) separated by two other poles (P); and (e) the excited poles (P) are always grouped in threes the middle one of which produces an oppositely directed magnetic flow to the two adjacent poles (P), whereby the rotating magnetic fields produced by inductive windings (E) are closed through adjacent poles (P) and only half of the inductive windings (E) are supplied with current at any given instant.