PERMANENT-MAGNET SYNCHRONOUS MOTOR FOR DRAINAGE PUMP Russian patent published in 2014 - IPC H02K21/12 H02K3/02 H02K3/32 H02K3/34 H02K3/38 H02K3/44 

FIELD: electricity.

SUBSTANCE: present invention relates to electrical engineering, particularly electrical machines, and peculiarities of making permanent-magnet synchronous motors for a drainage pump. The disclosed synchronous motor comprises a permanent-magnet rotor for rotating the a rotor wheel, a pump housing on which the permanent-magnet rotor rests, a stator core and a stator coil. According to the invention, the stator coil has a winding made of aluminium enamelled wire and is provided with a part for connection by welding the lead wire of said winding with a contact for connecting with the lead wire; the winding is hermetically insulated in a protective housing; the outer surface of the part for connection by welding of the lead wire of the winding made of aluminium enamelled wire is tin-plated by soldering or tin electroplating, wherein the part for connection by welding of the lead wire, tin-plated by soldering or tin electroplating, is welded to the contact for connection with the lead wire; the outer surface of the winding made of aluminium enamelled wire is first coated with insulating paper tape and then hermetically insulated by said protective housing.

EFFECT: enabling prolonged operation of motors in an air medium containing oxygen without oxidation of the aluminium lead wire while simplifying the process of welding said lead wire and simplifying the process of welding to a contact terminal; protecting aluminium enamelled wire from damage under the action of high temperature during hermetic insulation of the winding in the protective housing, formed by filling with plastic or epoxy resin.

8 cl, 4 dwg