Patent ID: 6657353
Filing Date: 2003-12-02
Classification: H02K

Abstract:
A dynamo-electric machine with separate and harmonized employment of positive and negative interacting forces, said machine comprising:a primary (2) comprising at least one pair (C1, C2) of pole groups (E1, E2; E3, E4), with the pole groups of the at least one pair being mechanically spaced apart and electrically offset from one another by a pole distance (p), wherein each pole group comprises a ferromagnetic core (A1, A2, A3, A4) and at least an electromagnetic coil (B1, B1â€², B2, B2â€²; B3, B3â€², B4, B4â€²); a secondary (3) comprising a succession of permanent magnets (31, 32, . . . , 310) that alternate in polarity from one permanent magnet to the next in a given direction; and a control system (5) connected for controlling the energization of said at least an electromagnetic coil of each said pole group by alternately supplying energizing current during successive energizing time periods (p1) and halting the supply of energizing current to said at least one electromagnetic coil during successive de-energizing time periods (p2) that alternate with the energizing time periods, wherein each said pole distance corresponds to (n+Â½) times the dimension of a permanent magnet in the given direction, where n=0 or a positive integer, and the energization control performed by said control system causes electromagnetic forces between said primary and said secondary to be balanced by permanent magnet forces for paired dispositions of the pole groups that are active separately during the energizing time periods and the ferromagnetic cores that are active separately during the de-energizing time periods, thereby neutralizing competing forces, in a succession of operating cycles composed of an electromagnetic energy component cycle superimposed on a ferromagnetic energy component cycle, and wherein said control system causes, during each cycle, said at least one electromagnetic coil to have at least one energizing time period and at least one de-energizing time period.