ENGINE WITH PERMANENT MAGNETS AND DIRECT STARTING FROM MAINS AND METHOD OF ITS CONNECTION Russian patent published in 2020 - IPC H02P1/48 H02P1/50 

FIELD: electrical equipment.

SUBSTANCE: invention relates to a motor with permanent magnets and direct starting from a mains intended for driving a centrifugal pump from a three-phase network, as well as a method for its activation, preferably for engines with power of at least 5 kW. Motor with permanent magnets and direct starting from the mains comprises rotor and stator with stator winding, wherein stator winding is made as pole-switched winding. With such method of connection, it is possible to avoid the saddle of the dynamic braking curve slowing the engine acceleration. Polus-switchable winding comprises the first winding stage and the second winding stage, which can operate separately from each other, note also that first stage of winding has number of pole pairs, denoted below as number p₁ of pole pairs for start, which is not equal to number of pole pairs of second stage of winding, hereinafter referred to as number p₂ of working pairs of poles.

EFFECT: technical result consists in prevention of dynamic braking moment developed during asynchronous acceleration process, by switching pole-switchable winding inducing rotary magnetic field at acceleration stage.

12 cl, 9 dwg