Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
231 words
A multiphase, synchronous electrical machine excited by permanent magnets, having a stator winding and a rotor, the permanent magnets generating a basic excitation field and electrical current flowing through the stator winding generating an additional magnetic field in a radial direction, said additional magnetic field being added to or subtracted from the basic excitation field in the radial direction, said permanent magnets being disposed in the rotor, said rotor being free of windings, soft magnetic material with intervening spaces of nonmagnetic material forming groups of loops nested within each other in the rotor, the loops being exteriorly open towards an air gap disposed between the stator winding and rotor, said groups of nested loops each enclosing a pole gap disposed at a circumferential surface of the rotor substantially centered in each nested loop group, the rotor being divided into at least two sections arranged axially, said first section being provided with said permanent magnets with said loops of soft magnetic material terminating at said permanent magnets, said second section having loops of soft magnetic material arranged such that said loops are open to the air gap between the stator winding and the rotor, said loops in said second section being nested within each other with nonmagnetic material being provided between said loops, said loops in said second section being provided to control the additional magnetic field generated by the stator winding.
Claim 2
Dependent Claim
231 words
A multiphase, synchronous electrical machine excited by permanent magnets, having a stator winding and a rotor, the permanent magnets generating a basic excitation field and electrical current flowing through the stator winding generating an additional magnetic field in a radial direction, said additional magnetic field being added to or subtracted from the basic excitation field in the radial direction, said permanent magnets being disposed in the rotor, said rotor being free of windings, soft magnetic material with intervening spaces of nonmagnetic material forming groups of loops nested within each other in the rotor, the loops being exteriorly open towards an air gap disposed between the stator winding and rotor, said groups of nested loops each enclosing a pole gap disposed at a circumferential surface of the rotor substantially centered in each nested loop group, the rotor being divided into at least two sections arranged axially, said first section being provided with said permanent magnets with said loops of soft magnetic material terminating at said permanent magnets, said second section having loops of soft magnetic material arranged such that said loops are open to the air gap between the stator winding and the rotor, said loops in said second section being nested within each other with nonmagnetic material being provided between said loops, said loops in said second section being provided to control the additional magnetic field generated by the stator winding.
Claim 3
Dependent Claim
21 words
The multiphase electrical rotating machine recited in claim 1, wherein the first section is disposed between two of said second sections.
Claim 4
Dependent Claim
28 words
The multiphase electrical rotating machine recited in claim 1, wherein the permanent magnets in the first section are disposed so as to be adjacent to the air gap.
Claim 5
Dependent Claim
35 words
The multiphase electrical rotating machine recited in claim 1, wherein the air gap between the stator winding and the second section is smaller than the air gap between the stator winding and the first section.
Claim 6
Dependent Claim
36 words
The multiphase electrical rotating machine recited in claim 1, wherein an extent of said first section in a longitudinal direction of the rotor is greater than an extent of the second section in the longitudinal direction.