A rotor for a rotating electric machine includes a field core having a plurality of claw-shaped magnetic pole portions, a field coil wound on the field core, and a hollow cylindrical core member disposed to cover radially outer peripheries of the claw-shaped magnetic pole portions of the field core. The core member is formed of a plurality of soft-magnetic bodies that are laminated in an axial direction of the core member. At least some of the soft-magnetic bodies forming the core member are fixed to one another by at least one staking portion that is formed along the axial direction of the core member.

A rotary electrical device includes a rotor configured to be rotatable; and a stator disposed in a radial direction of the rotor to surround a rotation axis of the rotor. The stator includes a plurality of stator units that are stacked in an axial direction of the rotor. Each of the stator units includes a winding, a stator core that surrounds the winding, and one or more claw magnetic poles that protrude radially toward the rotor from each of two end portions in an axial direction of the stator core. The rotor includes a magnet that radially faces at least a portion of any of claw magnetic poles of the stator at a predetermined rotation position. At least one of magnet end portions in an axial direction of the magnet protrudes further in the axial direction than all of the claw magnetic poles of the stator.

A salient pole machine a rotor having a rotor rim. A plurality of salient poles having a pole winding and extending in the radial direction are attached to the rotor rim, with the rotor rim having an outermost radial surface between the pole-rim interfaces. A plurality of axial rib-like rim extensions project radially from the outermost radial surface of the rotor rim with a predetermined circumferential distance between neighboring rim extensions. A plurality of axial pole grooves in the salient pole match and receive the rim extensions. Fixing elements fix the rim extensions in the pole grooves and are inserted axially into facing interface holes defined in facing sidewalls of the pole grooves and the rib-like rim extensions. The fixing elements are radially inward of the pole windings and are accessible for axial sliding removal from the facing interface holes.

A rotary electrical machine includes a switch for supplying power to a field winding and a controller. A ratio of an on-time to a switching cycle of the switch, i.e., a duty ratio which is larger than the duty ratio corresponding to the field current that gives the maximum reduction amount of the inductance of the field winding with respect to an increasing amount of the field current in a range that the field current can take and which has a predetermined value less than 100%. The controller calculates the duty ratio on the condition that an upper limit of the duty ratio is set as the predetermined value and turns on/off the switch based on the calculated duty ratio, and sets the predetermined value to be larger as a rotation speed of a rotor is higher, or as a d-axis current flowing through an armature winding is larger.

The invention relates to a rotor for a rotating electrical machine, comprising: a central shaft, an annular core coaxial to the shaft, a winding extending radially around the core, a first claw-pole and a second claw-pole arranged axially on each side of the core and the winding. Each claw-pole of the rotor comprises a plurality of triangular teeth having a base that is tangent to the pole wheel and comprising a first side, denoted a, and a second side, denoted b. The ratio of 1-a/b is between 0 and 0.5, or 0 and −0.5. The tip of the teeth of one of the claw-poles is equidistant between the ends of the bases adjacent to the tip of the teeth of the other claw-pole.

A motor includes a stator, a rotor and a case. The rotor includes a first rotor core, a second rotor core, and a field magnet. Each of the first rotor core and the second rotor core includes a core base and a plurality of claw poles. The field magnet is located between the core bases. The case includes a cylindrical yoke housing and a lid. To balance magnetic flux from the first rotor core with magnetic flux from the second rotor core, the distance between the rotor and the stator is varied from the distance between the rotor and the yoke housing or the teeth of the stator are shaped to enable magnetic saturation.

A circuit board has first rectifying element connecting portions and second rectifying element connecting portions, and is disposed between a first rectifying element holding portion and a second rectifying element holding portion, a plurality of first rectifying elements are each held by the first rectifying element holding portion, and are connected to the first rectifying element connecting portions by extending a first leading electrode axially, a plurality of second rectifying elements are each held by the second rectifying element holding portion, and are connected to the second rectifying element connecting portion by extending a second leading electrode axially, and a radial ventilation channel that passes through the rectifying apparatus in a radial direction is configured by disposing the circuit board so as to be spaced apart from at least one of the first rectifying element holding portion and the second rectifying element holding portion in an axial direction.

In a rotor of a rotary electric machine including a pair of gutter-shaped concave portions which are formed along a side surface positioned at the outside of an axis of field-magnet core components so as to install and protect a pair of lead wires, balance-correction concave portions formed by a molding die are provided at shoulders of claw-shaped magnetic poles being nearest to the gutter-shaped concave portions in claw-shaped magnetic poles arranged at positions which are evenly separated at least in a circumferential direction with respect to the pair of gutter-shaped concave portions.

A rotary electrical machine rotor having claw-shaped poles. The machine comprising a plurality of interpolar magnetic assemblies having at least two magnetic assemblies comprising different magnet grades.

According to an embodiment, a rotating electrical machine includes a rotor and a stator. The rotor includes a first coil, first magnetic poles and second magnetic poles. The stator includes a second coil, third magnetic poles and fourth magnetic poles. One of a first magnetic pole and a second magnetic pole opposite to the first magnetic pole is formed such that a leading end of the one of the first magnetic pole and the second magnetic pole lies opposite a central portion of an opposite surface of the stator. One of a third magnetic pole and a fourth magnetic pole opposite to the third magnetic pole is formed such that a leading end of the one of the third magnetic pole and the fourth magnetic pole lies opposite a central portion of an opposite surface of the rotor.