METHOD AND DEVICE FOR MUTUAL COMPENSATION OF BRAKING FORCES IN ELECTRIC GENERATOR WITH PERMANENT FORCES Russian patent published in 2010 - IPC H02K21/12 H02K21/24 H02K29/00 

FIELD: electric engineering.

SUBSTANCE: invention relates to noncontact electric generators with permanent magnets for small wind and hydraulic power plants (SPP). Peculiar feature of SPP is represented by relatively low breakaway torques of wind and hydraulic motors at low speeds of wind and water flows, which imposes specific requirement for electric generator - minimum braking torque at rotor axis of electric generator from the side of stator magnet systems. Method provides for compensation of retraction forces of some permanent magnets of rotor into some magnetic systems of stator by means of ejection forces of other permanent rotor magnets into other magnetic systems of stator. Proposed invention provides for minimisation of force action at generator rotor by forces of magnetic interaction of rotor magnetic sectors with magnetic systems of stator at simultaneous provision of high coefficient of transformation of mechanical energy of rotor rotation into electric one in wide range, both speeds of rotor rotation and value of rotation torque transmitted from wind motor or hydromotor.

EFFECT: elimination of rotor braking by mutual compensation of braking forces acting at rotor from the side of stator magnetic systems, which are inevitably present in electric generators with permanent magnets.

7 cl, 2 dwg