Patent ID: 7119468

Claim:
An electric motor, primarily for transport vehicles, comprising: (a) a stator with an annular magnetic conductor having an external and an internal circumferential surface and an axis; (b) a first set of permanent magnets being mounted symmetrically and with alternating polarity round the external circumference of the magnetic conductor, and (c) a second set of permanent magnets being mounted symmetrically and with alternating polarity round the internal circumference of the magnetic conductor, (d) the first and second sets of permanent magnets being arranged pairwise and opposed to each other with opposite polarity in a direction through a thickness of the annular magnetic conductor; (e) a rotor consisting of first and second sections, the first section being external, passing round the said stator, and the second section being internal, located inside the stator, each of the sections carrying equal numbers of electromagnets facing the permanent magnets of the stator, and both sections having a common geometrical axis with the axis of the annular magnetic conductor of the stator; (f) a collector-type current distributor having current-conducting plates located thereabout and separated by dielectric gaps, the plates being connected to a direct current supply so as to have alternating polarity; and (g) current collectors mounted so as to contact the plates of the collector-type distributor, the current collector being connected to windings of the electromagnets on the rotor, wherein the current collectors are mounted on the internal rotor section in such a manner that they can be displaced round the circumference relative to the current distributor.