Patent ID: 8049388
Filing Date: 2011-11-01
Classification: H02K

Abstract:
1. A rotor for an electrical machine excited by permanent magnets, comprising: a substantially cylindrical magnetic body of the rotor fitted onto a shaft of the electrical machine; and, plural sets of permanent magnets that establish alternating first and second poles in a circumferential direction of the rotor, wherein permanent magnet pieces in the sets of permanent magnets are fitted into openings arranged in the rotor and are excited in opposite directions, and wherein each of the plural sets of permanent magnets is fitted at least on an edge of at least one of the first and second pole, wherein the body includes plural segments that extend from the shaft to an outer circumference of the rotor in the circumferential direction, each segment having an outer side that forms the outer circumference of the rotor and edges on either side that extend from the shaft to the outer circumference of the rotor to establish an acute angle with the outer side, between the edges, wherein the body includes plural sections, and each section tapers outwardly in a radial direction of the rotor, and wherein the permanent magnet pieces of respective permanent magnet sets are arranged between each section and segment.