Abstract: A motor 1 comprises a stator 2, a rotor 10 mounted for rotation about a rotor axis 50 in the stator 2, a pole 11 of the stator 2, a winding on the stator pole 11, and at least one pair of salient poles 10a-d of the rotor 10. The rotor 10 is magnetised so that said rotor poles 10a-d are oppositely magnetised. The motor 1 further comprises an electrical circuit being provided with control means to produce an alternating magnetic field in the pole 11 of the stator 2 to attract each pole 10a-d of the rotor 10 as it approaches the pole 11 and to repel each pole 10a-d of the rotor 10 as it moves away from the pole 11, said field alternating as many times per revolution of the rotor 10 as there are poles of the rotor 10. Each pole 10a-d of the rotor 10 is magnetised by a permanent magnet 72 carried by said pole 10a-d, wherein the magnet 72 has a magnet axis of magnetisation 80, which magnet axis 80 is inclined with respect to a radial direction 82 of said rotor axis 50.

Abstract: A motor (1) has a stator (2) and a rotor (10) mounted for rotation in the stator. A commutating salient pole (11) of the stator as a winding (7), and a field-producing salient pole (12) has a winding (8). The rotor has at least two salient poles (10a, b). An outer back-iron (13) magnetically joins bases of said stator poles. An inner back-iron (14) extends from the field pole around the rotor to such an extent that a substantial amount of the magnetic field in the rotor between its poles is short-circuited by the inner back-iron, at least for a part of its rotation. An electrical circuit powers the windings to drivingly rotate the rotor.

Abstract: A system and method for producing electrochemical conversion in an electrochemical device comprises a power converter, for example, a resonant circuit, connected to the electrochemical device and a triggering circuit connected to the power converter. The triggering circuit comprises a pulse generator to trigger the power converter to generate positive pulses of current for passing through the electrochemical device causing electrochemical conversion in the electrochemical device.

Abstract: A motor (1) has a stator (2) and a rotor (10) mounted for rotation in the stator. A commutating salient pole (11) of the stator as a winding (7), and a field-producing salient pole (12) has a winding (8). The rotor has at least two salient poles (10a,b). An outer back-iron (13) magnetically joins bases of said stator poles. An inner back-iron (14) extends from the field pole around the rotor to such an extent that a substantial amount of the magnetic field in the rotor between its poles is short-circuited by the inner back-iron, at least for a part of its rotation. An electrical circuit powers the windings to drivingly rotate the rotor.