ELECTROMAGNETICALLY EXCITED CONTACTLESS VALVE-TYPE INDUCTOR MACHINE Russian patent published in 2006 - IPC H02K19/10 H02K29/00 

FIELD: electrical engineering; contactless valve-type electrical machines.

SUBSTANCE: proposed electrical machine designed for driving medium- and heavy-power ships, large motor cars, trolley buses, subway trains, excavators, drilling rigs and miscellaneous material-handling facilities, and pumps of water-purification structures, as well as for lifting active components of nuclear power stations has frame accommodating laminated stacks of electric steel stampings whose quantity is a multiple of two, with teeth whose quantity is a multiple of three, and slots to receive phase windings, the latter being placed in slots of these stacks so that their turns in slot portions of winding are parallel to longitudinal axis of machine and one turn encloses all teeth of stator stacks opposing one another; field winding disposed on stator between its stacks, with its longitudinal axis parallel to that of electrical machine; nonmagnetic metal shaft carrying magnetically soft metal bushing that mounts toothed rotor stacks of magnetically soft stampings whose quantity equals that of stator stacks; and two end plates with bearings; novelty is that total number of phase windings is greater than three and its quantity is a multiple of three, every three phase windings having their independent neutral point, and adjacent triads being shifted in phase through certain angle, with stator-to-rotor tooth ratio Z_st-to-Z_r starting with five: 5, 7, 11, 13, 17 .... Such design provides for attaining desired power level, reduced torque pulsation of motor or voltage ripples for generator, ability of using inverters having low-voltage integrated-circuit components and machine operation at heavy loads and low temperatures, varying machine characteristics within wide range, using well-known and mastered digital technologies for controlling machine operation.

EFFECT: facilitated manufacture, extended service life, enhanced operating reliability and reparability of machine.

5 cl, 8 dwg