Electric motor of a submersible pump

H - Electricity – 02 – K

Patent

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Details

H02K 3/12 (2006.01) F04B 47/00 (2006.01) F04D 13/08 (2006.01)

Patent

CA 2285415

The present invention relates to a motor for a submerged pump, wherein said motor comprises a rotor (5) as well as a body (1) having the magnetic conductor (2) of a stator mounted therein. The stator has a dented area (8) comprising grooves (9) in which are arranged the multiple-coil sections of a dual-layer winding having lobe-shaped portions. The magnetic conductor (2) of the stator comprises two parts (6, 7), i.e. an inner part (6) whose grooves open towards its periphery as well as an outer part (7) forming an annular magnet yoke. Each section of the stator winding has an essentially square cross section and is formed by the coils (12) of a conductor having an essentially rectangular cross section, wherein said coils rest against each other along their large surfaces. The first and second sides of each section are arranged in the various layers (13, 14) of the dual layer winding so that in each groove (9) of the winding layers (13, 14), the large surfaces of the coils (12) are mutually perpendicular and so that the lobe-shaped portions have a height not exceeding that of the groove (9). This motor is mainly intended for submerged pumping equipment used in submerged wells.

Cette invention concerne un moteur électrique pour pompe immergée, lequel comprend un rotor (5) ainsi qu'un un corps (1) dans lequel est monté de conducteur magnétique (2) d'un stator. Le stator comprend une zone dentée (8) dans les gorges (9) de laquelle sont disposées les sections à spires multiples d'un enroulement à deux couches qui possède des parties en forme de lobes. Le conducteur magnétique (2) du stator comprend deux parties (6, 7), à savoir une partie interne (6) dont les gorges (9) sont ouvertes en direction de sa périphérie et une partie externe (7) qui consiste en une culasse annulaire. Chaque section de l'enroulement du stator possède une section transversale globalement carrée, et est formée par les spires (12) d'un conducteur dont la section transversale est globalement rectangulaire, lesdites spires reposant l'une contre l'autre le long de leurs grandes surfaces. Le premier et le deuxième côté de chaque section sont disposés dans diverses couches (13, 14) de l'enroulement à deux couches, ceci de sorte que dans chaque gorge (9) des couches (13, 14) de l'enroulement, les grandes surfaces des spires (12) soient perpendiculaires les unes aux autres et que la hauteur des parties en forme de lobe ne dépasse pas la hauteur de la gorge (9). Ce moteur électrique est notamment destiné à des installation de pompage immergées que l'on utilise dans des puits immergés.

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