Permanent magnet excited synchronous machine with embedded magnets

摘要

A permanent magnet excited synchronous machine (1) with embedded magnets, which is particularly suitable for range extender generator. It includes stator (2) and rotor (3) being provided with exciter magnets (7). The rotor (3) has at least two rotor poles (4), each is provided with one exciter magnet (7). In order to increase the magnetic torque limit of the synchronous machine (1)—in each rotor pole (4) at least one, preferably several selective magnetic flux barriers, preferably as substantially radial slots (8) being parallel with the main pole flux is/are provided in the area of the pole shoe.

主权项

1. A permanent magnet excited synchronous machine comprising:
a stator, said stator having a plurality of circumferential stator teeth; a rotor configured to rotate in said stator; a rotary shaft supporting said rotor for rotation on its axis; a salient pole on said rotor, said salient pole including a shank, said salient pole including a shoe on said shank; a rectangular cross-section cavity in said salient pole, said rectangular cavity having a cross-section major axis coincident with a chord of a circle delimited by the rotor diameter, said rectangular cavity having a radially-outer top wall parallel to said chord and said major axis; an exciter permanent magnet in said rectangular cavity; a plurality of selective flux barrier slots in said salient pole, said plurality of slots disposed radially outwardly of said permanent magnet and between said radially-outer top wall of said rectangular cavity and an external surface of said shoe; said plurality of slots disposed in a fan arrangement relative to said chord so that slots of said plurality that are located circumferentially nearer to a main axis of said pole are inclined at a lesser absolute value of inclination angle relative to the main pole axis than are others of said slots relatively located circumferentially farther from the main pole axis; and, said plurality of slots is a number selected to correspond to the number of said stator teeth radially opposite to said shoe.