Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
Electrical machine comprising a stationary part having a multiphase winding, and a movable part separated from said stationary part by an effective gap, said movable part including a plurality of poles each comprising a pair of adjacent pole portions each having first and second end regions located, respectively, at and remote from said effective gap, said pole portions of each pole being shaped so as to diverge away from each other in the direction away from said effective gap and having their first end regions separated from each other by a magnetically non-conductive separating gap which is greater than said effective gap, and a respective permanent magnet interposed between each of said pole portions and the proximate pole portion of the next adjacent one of said poles, the direction of flux of each of said permanent magnets being opposite to the direction of flux of each next adjacent permanent magnet.
Claim 2
Dependent Claim
150 words
Electrical machine comprising a stationary part having a multiphase winding, and a movable part separated from said stationary part by an effective gap, said movable part including a plurality of poles each comprising a pair of adjacent pole portions each having first and second end regions located, respectively, at and remote from said effective gap, said pole portions of each pole being shaped so as to diverge away from each other in the direction away from said effective gap and having their first end regions separated from each other by a magnetically non-conductive separating gap which is greater than said effective gap, and a respective permanent magnet interposed between each of said pole portions and the proximate pole portion of the next adjacent one of said poles, the direction of flux of each of said permanent magnets being opposite to the direction of flux of each next adjacent permanent magnet.
Claim 3
Dependent Claim
22 words
Electrical machine according to claim 1, wherein the direction of flux of each permanent magnet is mainly parallel to the effective gap.
Claim 4
Dependent Claim
49 words
Electrical machine according to claim 1, wherein in the area between each two adjacent poles of said movable part at said effective gap a magnetically effective enlargement of the width of said effective gap is provided, said enlargement extending over at least one slot pitch of said stationary part.
Claim 5
Dependent Claim
34 words
Electrical machine according to claim 3, wherein the ratio of the magnet surface area to the pole surface area for each permanent magnet and its associated pole of said movable part is about 2.
Claim 6
Dependent Claim
30 words
Electrical machine according to claim 1, wherein the phase number of said multiphase winding of said stationary part is greater than three per each pole pitch of said movable part.
Claim 7
Dependent Claim
29 words
Electrical machine according to claim 5, wherein said phase number is an odd number with reference to said pole pitch of said movable part, being preferably five or seven.
Claim 8
Dependent Claim
46 words
Electrical machine according to claim 1, wherein each of said pole portions is composed of a plurality of pole laminations oriented transversely to the direction of motion of said movable part, said pole laminations of each pole portion being separated from each other by non-magnetic spaces.
Claim 9
Dependent Claim
21 words
Electrical machine according to claim 6, wherein said non-magnetic spaces are filled by a mechanically resistant and magnetically poorly conductive material.
Claim 10
Dependent Claim
24 words
Electrical machine according to claim 6, wherein the width of each of said non-magnetic spaces approximately corresponds to the width of said effective gap.
Claim 11
Dependent Claim
27 words
Electrical machine according to claim 7, wherein said pole laminations consist of iron sheets having their planes oriented in the direction of motion of the movable part.
Claim 12
Dependent Claim
34 words
Electrical machine according to claim 7, wherein the sum of the thicknesses of said pole laminations of said movable part corresponds at least to the sum of the tooth widths of said stationary part.