Abstract: A synchronous motor having a variable reluctance comprising a stator provided with poles each bearing an inductive winding and comprising radial teeth on their polar face. The synchronous motor further comprises a rotor which is coaxially disposed with respect to the stator and which is externally provided with radial teeth.The windings, which are all identical and which are supplied with a threephase electric current, are connected in such a way that the rotating magnetic fields produced by the windings are closed through adjacent poles. In a motor having twelve poles, the windings (E) provided on the diametrically opposed poles are placed in series with a diode (D) to form a group (G) of elements. Each diode (D) is such that two diodes (D) connected respectively to two windings (E) provided on two adjacent poles permit the passage of oppositely directed electric currents.